ffmpeg/ffmpeg.c

/*
 * FFmpeg main
 * Copyright (c) 2000-2003 Fabrice Bellard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/* needed for usleep() */
#define _XOPEN_SOURCE 600

#include "config.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <limits.h>
#include <unistd.h>
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libavcodec/opt.h"
#include "libavcodec/audioconvert.h"
#include "libavcore/audioconvert.h"
#include "libavcore/parseutils.h"
#include "libavcore/samplefmt.h"
#include "libavutil/colorspace.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/libm.h"
#include "libavformat/os_support.h"

#if CONFIG_AVFILTER
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
# include "libavfilter/vsrc_buffer.h"
#endif

#if HAVE_SYS_RESOURCE_H
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#elif HAVE_GETPROCESSTIMES
#include <windows.h>
#endif
#if HAVE_GETPROCESSMEMORYINFO
#include <windows.h>
#include <psapi.h>
#endif

#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

#if HAVE_TERMIOS_H
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <termios.h>
#elif HAVE_CONIO_H
#include <conio.h>
#endif
#include <time.h>

#include "cmdutils.h"

#include "libavutil/avassert.h"

const char program_name[] = "FFmpeg";
const int program_birth_year = 2000;

/* select an input stream for an output stream */
typedef struct AVStreamMap {
    int file_index;
    int stream_index;
    int sync_file_index;
    int sync_stream_index;
} AVStreamMap;

/**
 * select an input file for an output file
 */
typedef struct AVMetaDataMap {
    int  file;      //< file index
    char type;      //< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
    int  index;     //< stream/chapter/program number
} AVMetaDataMap;

typedef struct AVChapterMap {
    int in_file;
    int out_file;
} AVChapterMap;

static const OptionDef options[];

#define MAX_FILES 100
#if !FF_API_MAX_STREAMS
#define MAX_STREAMS 1024    /* arbitrary sanity check value */
#endif

static const char *last_asked_format = NULL;
static AVFormatContext *input_files[MAX_FILES];
static int64_t input_files_ts_offset[MAX_FILES];
static double *input_files_ts_scale[MAX_FILES] = {NULL};
static AVCodec **input_codecs = NULL;
static int nb_input_files = 0;
static int nb_input_codecs = 0;
static int nb_input_files_ts_scale[MAX_FILES] = {0};

static AVFormatContext *output_files[MAX_FILES];
static AVCodec **output_codecs = NULL;
static int nb_output_files = 0;
static int nb_output_codecs = 0;

static AVStreamMap *stream_maps = NULL;
static int nb_stream_maps;

/* first item specifies output metadata, second is input */
static AVMetaDataMap (*meta_data_maps)[2] = NULL;
static int nb_meta_data_maps;
static int metadata_global_autocopy   = 1;
static int metadata_streams_autocopy  = 1;
static int metadata_chapters_autocopy = 1;

static AVChapterMap *chapter_maps = NULL;
static int nb_chapter_maps;

/* indexed by output file stream index */
static int *streamid_map = NULL;
static int nb_streamid_map = 0;

static int frame_width  = 0;
static int frame_height = 0;
static float frame_aspect_ratio = 0;
static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;
static enum AVSampleFormat audio_sample_fmt = AV_SAMPLE_FMT_NONE;
static int max_frames[4] = {INT_MAX, INT_MAX, INT_MAX, INT_MAX};
static AVRational frame_rate;
static float video_qscale = 0;
static uint16_t *intra_matrix = NULL;
static uint16_t *inter_matrix = NULL;
static const char *video_rc_override_string=NULL;
static int video_disable = 0;
static int video_discard = 0;
static char *video_codec_name = NULL;
static unsigned int video_codec_tag = 0;
static char *video_language = NULL;
static int same_quality = 0;
static int do_deinterlace = 0;
static int top_field_first = -1;
static int me_threshold = 0;
static int intra_dc_precision = 8;
static int loop_input = 0;
static int loop_output = AVFMT_NOOUTPUTLOOP;
static int qp_hist = 0;
#if CONFIG_AVFILTER
static char *vfilters = NULL;
AVFilterGraph *graph = NULL;
#endif

static int intra_only = 0;
static int audio_sample_rate = 44100;
static int64_t channel_layout = 0;
#define QSCALE_NONE -99999
static float audio_qscale = QSCALE_NONE;
static int audio_disable = 0;
static int audio_channels = 1;
static char  *audio_codec_name = NULL;
static unsigned int audio_codec_tag = 0;
static char *audio_language = NULL;

static int subtitle_disable = 0;
static char *subtitle_codec_name = NULL;
static char *subtitle_language = NULL;
static unsigned int subtitle_codec_tag = 0;

static float mux_preload= 0.5;
static float mux_max_delay= 0.7;

static int64_t recording_time = INT64_MAX;
static int64_t start_time = 0;
static int64_t recording_timestamp = 0;
static int64_t input_ts_offset = 0;
static int file_overwrite = 0;
static AVMetadata *metadata;
static int do_benchmark = 0;
static int do_hex_dump = 0;
static int do_pkt_dump = 0;
static int do_psnr = 0;
static int do_pass = 0;
static char *pass_logfilename_prefix = NULL;
static int audio_stream_copy = 0;
static int video_stream_copy = 0;
static int subtitle_stream_copy = 0;
static int video_sync_method= -1;
static int audio_sync_method= 0;
static float audio_drift_threshold= 0.1;
static int copy_ts= 0;
static int copy_tb;
static int opt_shortest = 0;
static int video_global_header = 0;
static char *vstats_filename;
static FILE *vstats_file;
static int opt_programid = 0;
static int copy_initial_nonkeyframes = 0;

static int rate_emu = 0;

static int  video_channel = 0;
static char *video_standard;

static int audio_volume = 256;

static int exit_on_error = 0;
static int using_stdin = 0;
static int verbose = 1;
static int thread_count= 1;
static int q_pressed = 0;
static int64_t video_size = 0;
static int64_t audio_size = 0;
static int64_t extra_size = 0;
static int nb_frames_dup = 0;
static int nb_frames_drop = 0;
static int input_sync;
static uint64_t limit_filesize = 0;
static int force_fps = 0;
static char *forced_key_frames = NULL;

static float dts_delta_threshold = 10;

static unsigned int sws_flags = SWS_BICUBIC;

static int64_t timer_start;

static uint8_t *audio_buf;
static uint8_t *audio_out;
unsigned int allocated_audio_out_size, allocated_audio_buf_size;

static short *samples;

static AVBitStreamFilterContext *video_bitstream_filters=NULL;
static AVBitStreamFilterContext *audio_bitstream_filters=NULL;
static AVBitStreamFilterContext *subtitle_bitstream_filters=NULL;

#define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"

struct AVInputStream;

typedef struct AVOutputStream {
    int file_index;          /* file index */
    int index;               /* stream index in the output file */
    int source_index;        /* AVInputStream index */
    AVStream *st;            /* stream in the output file */
    int encoding_needed;     /* true if encoding needed for this stream */
    int frame_number;
    /* input pts and corresponding output pts
       for A/V sync */
    //double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
    struct AVInputStream *sync_ist; /* input stream to sync against */
    int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number
    AVBitStreamFilterContext *bitstream_filters;
    /* video only */
    int video_resample;
    AVFrame pict_tmp;      /* temporary image for resampling */
    struct SwsContext *img_resample_ctx; /* for image resampling */
    int resample_height;
    int resample_width;
    int resample_pix_fmt;

    /* full frame size of first frame */
    int original_height;
    int original_width;

    /* forced key frames */
    int64_t *forced_kf_pts;
    int forced_kf_count;
    int forced_kf_index;

    /* audio only */
    int audio_resample;
    ReSampleContext *resample; /* for audio resampling */
    int resample_sample_fmt;
    int resample_channels;
    int resample_sample_rate;
    int reformat_pair;
    AVAudioConvert *reformat_ctx;
    AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
    FILE *logfile;
} AVOutputStream;

static AVOutputStream **output_streams_for_file[MAX_FILES] = { NULL };
static int nb_output_streams_for_file[MAX_FILES] = { 0 };

typedef struct AVInputStream {
    int file_index;
    int index;
    AVStream *st;
    int discard;             /* true if stream data should be discarded */
    int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
    int64_t sample_index;      /* current sample */

    int64_t       start;     /* time when read started */
    int64_t       next_pts;  /* synthetic pts for cases where pkt.pts
                                is not defined */
    int64_t       pts;       /* current pts */
    PtsCorrectionContext pts_ctx;
    int is_start;            /* is 1 at the start and after a discontinuity */
    int showed_multi_packet_warning;
    int is_past_recording_time;
#if CONFIG_AVFILTER
    AVFilterContext *output_video_filter;
    AVFilterContext *input_video_filter;
    AVFrame *filter_frame;
    int has_filter_frame;
    AVFilterBufferRef *picref;
#endif
} AVInputStream;

typedef struct AVInputFile {
    int eof_reached;      /* true if eof reached */
    int ist_index;        /* index of first stream in ist_table */
    int buffer_size;      /* current total buffer size */
    int nb_streams;       /* nb streams we are aware of */
} AVInputFile;

#if HAVE_TERMIOS_H

/* init terminal so that we can grab keys */
static struct termios oldtty;
#endif

#if CONFIG_AVFILTER

static int configure_filters(AVInputStream *ist, AVOutputStream *ost)
{
    AVFilterContext *last_filter, *filter;
    /** filter graph containing all filters including input & output */
    AVCodecContext *codec = ost->st->codec;
    AVCodecContext *icodec = ist->st->codec;
    FFSinkContext ffsink_ctx = { .pix_fmt = codec->pix_fmt };
    char args[255];
    int ret;

    graph = avfilter_graph_alloc();

    snprintf(args, 255, "%d:%d:%d:%d:%d", ist->st->codec->width,
             ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE);
    ret = avfilter_graph_create_filter(&ist->input_video_filter, avfilter_get_by_name("buffer"),
                                       "src", args, NULL, graph);
    if (ret < 0)
        return ret;
    ret = avfilter_graph_create_filter(&ist->output_video_filter, &ffsink,
                                       "out", NULL, &ffsink_ctx, graph);
    if (ret < 0)
        return ret;
    last_filter = ist->input_video_filter;

    if (codec->width  != icodec->width || codec->height != icodec->height) {
        snprintf(args, 255, "%d:%d:flags=0x%X",
                 codec->width,
                 codec->height,
                 (int)av_get_int(sws_opts, "sws_flags", NULL));
        if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
                                                NULL, args, NULL, graph)) < 0)
            return ret;
        if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
            return ret;
        last_filter = filter;
    }

    snprintf(args, sizeof(args), "flags=0x%X", (int)av_get_int(sws_opts, "sws_flags", NULL));
    graph->scale_sws_opts = av_strdup(args);

    if (vfilters) {
        AVFilterInOut *outputs = av_malloc(sizeof(AVFilterInOut));
        AVFilterInOut *inputs  = av_malloc(sizeof(AVFilterInOut));

        outputs->name    = av_strdup("in");
        outputs->filter_ctx = last_filter;
        outputs->pad_idx = 0;
        outputs->next    = NULL;

        inputs->name    = av_strdup("out");
        inputs->filter_ctx = ist->output_video_filter;
        inputs->pad_idx = 0;
        inputs->next    = NULL;

        if ((ret = avfilter_graph_parse(graph, vfilters, inputs, outputs, NULL)) < 0)
            return ret;
        av_freep(&vfilters);
    } else {
        if ((ret = avfilter_link(last_filter, 0, ist->output_video_filter, 0)) < 0)
            return ret;
    }

    if ((ret = avfilter_graph_config(graph, NULL)) < 0)
        return ret;

    codec->width  = ist->output_video_filter->inputs[0]->w;
    codec->height = ist->output_video_filter->inputs[0]->h;

    return 0;
}
#endif /* CONFIG_AVFILTER */

static void term_exit(void)
{
    av_log(NULL, AV_LOG_QUIET, "");
#if HAVE_TERMIOS_H
    tcsetattr (0, TCSANOW, &oldtty);
#endif
}

static volatile int received_sigterm = 0;

static void
sigterm_handler(int sig)
{
    received_sigterm = sig;
    term_exit();
}

static void term_init(void)
{
#if HAVE_TERMIOS_H
    struct termios tty;

    tcgetattr (0, &tty);
    oldtty = tty;
    atexit(term_exit);

    tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
                          |INLCR|IGNCR|ICRNL|IXON);
    tty.c_oflag |= OPOST;
    tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
    tty.c_cflag &= ~(CSIZE|PARENB);
    tty.c_cflag |= CS8;
    tty.c_cc[VMIN] = 1;
    tty.c_cc[VTIME] = 0;

    tcsetattr (0, TCSANOW, &tty);
    signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
#endif

    signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).  */
    signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
#ifdef SIGXCPU
    signal(SIGXCPU, sigterm_handler);
#endif
}

/* read a key without blocking */
static int read_key(void)
{
#if HAVE_TERMIOS_H
    int n = 1;
    unsigned char ch;
    struct timeval tv;
    fd_set rfds;

    FD_ZERO(&rfds);
    FD_SET(0, &rfds);
    tv.tv_sec = 0;
    tv.tv_usec = 0;
    n = select(1, &rfds, NULL, NULL, &tv);
    if (n > 0) {
        n = read(0, &ch, 1);
        if (n == 1)
            return ch;

        return n;
    }
#elif HAVE_CONIO_H
    if(kbhit())
        return(getch());
#endif
    return -1;
}

static int decode_interrupt_cb(void)
{
    return q_pressed || (q_pressed = read_key() == 'q');
}

static int ffmpeg_exit(int ret)
{
    int i;

    /* close files */
    for(i=0;i<nb_output_files;i++) {
        /* maybe av_close_output_file ??? */
        AVFormatContext *s = output_files[i];
        int j;
        if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
            url_fclose(s->pb);
        for(j=0;j<s->nb_streams;j++) {
            av_metadata_free(&s->streams[j]->metadata);
            av_free(s->streams[j]->codec);
            av_free(s->streams[j]->info);
            av_free(s->streams[j]);
        }
        for(j=0;j<s->nb_programs;j++) {
            av_metadata_free(&s->programs[j]->metadata);
        }
        for(j=0;j<s->nb_chapters;j++) {
            av_metadata_free(&s->chapters[j]->metadata);
        }
        av_metadata_free(&s->metadata);
        av_free(s);
        av_free(output_streams_for_file[i]);
    }
    for(i=0;i<nb_input_files;i++) {
        av_close_input_file(input_files[i]);
        av_free(input_files_ts_scale[i]);
    }

    av_free(intra_matrix);
    av_free(inter_matrix);

    if (vstats_file)
        fclose(vstats_file);
    av_free(vstats_filename);

    av_free(opt_names);
    av_free(streamid_map);
    av_free(input_codecs);
    av_free(output_codecs);
    av_free(stream_maps);
    av_free(meta_data_maps);

    av_free(video_codec_name);
    av_free(audio_codec_name);
    av_free(subtitle_codec_name);

    av_free(video_standard);

    uninit_opts();
    av_free(audio_buf);
    av_free(audio_out);
    allocated_audio_buf_size= allocated_audio_out_size= 0;
    av_free(samples);

#if CONFIG_AVFILTER
    avfilter_uninit();
#endif

    if (received_sigterm) {
        fprintf(stderr,
            "Received signal %d: terminating.\n",
            (int) received_sigterm);
        exit (255);
    }

    exit(ret); /* not all OS-es handle main() return value */
    return ret;
}

/* similar to ff_dynarray_add() and av_fast_realloc() */
static void *grow_array(void *array, int elem_size, int *size, int new_size)
{
    if (new_size >= INT_MAX / elem_size) {
        fprintf(stderr, "Array too big.\n");
        ffmpeg_exit(1);
    }
    if (*size < new_size) {
        uint8_t *tmp = av_realloc(array, new_size*elem_size);
        if (!tmp) {
            fprintf(stderr, "Could not alloc buffer.\n");
            ffmpeg_exit(1);
        }
        memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
        *size = new_size;
        return tmp;
    }
    return array;
}

static void choose_sample_fmt(AVStream *st, AVCodec *codec)
{
    if(codec && codec->sample_fmts){
        const enum AVSampleFormat *p= codec->sample_fmts;
        for(; *p!=-1; p++){
            if(*p == st->codec->sample_fmt)
                break;
        }
        if(*p == -1)
            st->codec->sample_fmt = codec->sample_fmts[0];
    }
}

static void choose_sample_rate(AVStream *st, AVCodec *codec)
{
    if(codec && codec->supported_samplerates){
        const int *p= codec->supported_samplerates;
        int best=0;
        int best_dist=INT_MAX;
        for(; *p; p++){
            int dist= abs(st->codec->sample_rate - *p);
            if(dist < best_dist){
                best_dist= dist;
                best= *p;
            }
        }
        if(best_dist){
            av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
        }
        st->codec->sample_rate= best;
    }
}

static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
{
    if(codec && codec->pix_fmts){
        const enum PixelFormat *p= codec->pix_fmts;
        if(st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL){
            if(st->codec->codec_id==CODEC_ID_MJPEG){
                p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE};
            }else if(st->codec->codec_id==CODEC_ID_LJPEG){
                p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE};
            }
        }
        for(; *p!=-1; p++){
            if(*p == st->codec->pix_fmt)
                break;
        }
        if(*p == -1)
            st->codec->pix_fmt = codec->pix_fmts[0];
    }
}

static AVOutputStream *new_output_stream(AVFormatContext *oc, int file_idx)
{
    int idx = oc->nb_streams - 1;
    AVOutputStream *ost;

    output_streams_for_file[file_idx] =
        grow_array(output_streams_for_file[file_idx],
                   sizeof(*output_streams_for_file[file_idx]),
                   &nb_output_streams_for_file[file_idx],
                   oc->nb_streams);
    ost = output_streams_for_file[file_idx][idx] =
        av_mallocz(sizeof(AVOutputStream));
    if (!ost) {
        fprintf(stderr, "Could not alloc output stream\n");
        ffmpeg_exit(1);
    }
    ost->file_index = file_idx;
    ost->index = idx;
    return ost;
}

static int read_ffserver_streams(AVFormatContext *s, const char *filename)
{
    int i, err;
    AVFormatContext *ic;
    int nopts = 0;

    err = av_open_input_file(&ic, filename, NULL, FFM_PACKET_SIZE, NULL);
    if (err < 0)
        return err;
    /* copy stream format */
    s->nb_streams = 0;
    for(i=0;i<ic->nb_streams;i++) {
        AVStream *st;
        AVCodec *codec;

        s->nb_streams++;

        // FIXME: a more elegant solution is needed
        st = av_mallocz(sizeof(AVStream));
        memcpy(st, ic->streams[i], sizeof(AVStream));
        st->codec = avcodec_alloc_context();
        if (!st->codec) {
            print_error(filename, AVERROR(ENOMEM));
            ffmpeg_exit(1);
        }
        avcodec_copy_context(st->codec, ic->streams[i]->codec);
        s->streams[i] = st;

        codec = avcodec_find_encoder(st->codec->codec_id);
        if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
            if (audio_stream_copy) {
                st->stream_copy = 1;
            } else
                choose_sample_fmt(st, codec);
        } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
            if (video_stream_copy) {
                st->stream_copy = 1;
            } else
                choose_pixel_fmt(st, codec);
        }

        if(!st->codec->thread_count)
            st->codec->thread_count = 1;
        if(st->codec->thread_count>1)
            avcodec_thread_init(st->codec, st->codec->thread_count);

        if(st->codec->flags & CODEC_FLAG_BITEXACT)
            nopts = 1;

        new_output_stream(s, nb_output_files);
    }

    if (!nopts)
        s->timestamp = av_gettime();

    av_close_input_file(ic);
    return 0;
}

static double
get_sync_ipts(const AVOutputStream *ost)
{
    const AVInputStream *ist = ost->sync_ist;
    return (double)(ist->pts - start_time)/AV_TIME_BASE;
}

static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx, AVBitStreamFilterContext *bsfc){
    int ret;

    while(bsfc){
        AVPacket new_pkt= *pkt;
        int a= av_bitstream_filter_filter(bsfc, avctx, NULL,
                                          &new_pkt.data, &new_pkt.size,
                                          pkt->data, pkt->size,
                                          pkt->flags & AV_PKT_FLAG_KEY);
        if(a>0){
            av_free_packet(pkt);
            new_pkt.destruct= av_destruct_packet;
        } else if(a<0){
            fprintf(stderr, "%s failed for stream %d, codec %s",
                    bsfc->filter->name, pkt->stream_index,
                    avctx->codec ? avctx->codec->name : "copy");
            print_error("", a);
            if (exit_on_error)
                ffmpeg_exit(1);
        }
        *pkt= new_pkt;

        bsfc= bsfc->next;
    }

    ret= av_interleaved_write_frame(s, pkt);
    if(ret < 0){
        print_error("av_interleaved_write_frame()", ret);
        ffmpeg_exit(1);
    }
}

#define MAX_AUDIO_PACKET_SIZE (128 * 1024)

static void do_audio_out(AVFormatContext *s,
                         AVOutputStream *ost,
                         AVInputStream *ist,
                         unsigned char *buf, int size)
{
    uint8_t *buftmp;
    int64_t audio_out_size, audio_buf_size;
    int64_t allocated_for_size= size;

    int size_out, frame_bytes, ret, resample_changed;
    AVCodecContext *enc= ost->st->codec;
    AVCodecContext *dec= ist->st->codec;
    int osize= av_get_bits_per_sample_fmt(enc->sample_fmt)/8;
    int isize= av_get_bits_per_sample_fmt(dec->sample_fmt)/8;
    const int coded_bps = av_get_bits_per_sample(enc->codec->id);

need_realloc:
    audio_buf_size= (allocated_for_size + isize*dec->channels - 1) / (isize*dec->channels);
    audio_buf_size= (audio_buf_size*enc->sample_rate + dec->sample_rate) / dec->sample_rate;
    audio_buf_size= audio_buf_size*2 + 10000; //safety factors for the deprecated resampling API
    audio_buf_size= FFMAX(audio_buf_size, enc->frame_size);
    audio_buf_size*= osize*enc->channels;

    audio_out_size= FFMAX(audio_buf_size, enc->frame_size * osize * enc->channels);
    if(coded_bps > 8*osize)
        audio_out_size= audio_out_size * coded_bps / (8*osize);
    audio_out_size += FF_MIN_BUFFER_SIZE;

    if(audio_out_size > INT_MAX || audio_buf_size > INT_MAX){
        fprintf(stderr, "Buffer sizes too large\n");
        ffmpeg_exit(1);
    }

    av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
    av_fast_malloc(&audio_out, &allocated_audio_out_size, audio_out_size);
    if (!audio_buf || !audio_out){
        fprintf(stderr, "Out of memory in do_audio_out\n");
        ffmpeg_exit(1);
    }

    if (enc->channels != dec->channels)
        ost->audio_resample = 1;

    resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
                       ost->resample_channels    != dec->channels   ||
                       ost->resample_sample_rate != dec->sample_rate;

    if ((ost->audio_resample && !ost->resample) || resample_changed) {
        if (resample_changed) {
            av_log(NULL, AV_LOG_INFO, "Input stream #%d.%d frame changed from rate:%d fmt:%s ch:%d to rate:%d fmt:%s ch:%d\n",
                   ist->file_index, ist->index,
                   ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
                   dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
            ost->resample_sample_fmt  = dec->sample_fmt;
            ost->resample_channels    = dec->channels;
            ost->resample_sample_rate = dec->sample_rate;
            if (ost->resample)
                audio_resample_close(ost->resample);
        }
        if (ost->resample_sample_fmt  == enc->sample_fmt &&
            ost->resample_channels    == enc->channels   &&
            ost->resample_sample_rate == enc->sample_rate) {
            ost->resample = NULL;
            ost->audio_resample = 0;
        } else {
            if (dec->sample_fmt != AV_SAMPLE_FMT_S16)
                fprintf(stderr, "Warning, using s16 intermediate sample format for resampling\n");
            ost->resample = av_audio_resample_init(enc->channels,    dec->channels,
                                                   enc->sample_rate, dec->sample_rate,
                                                   enc->sample_fmt,  dec->sample_fmt,
                                                   16, 10, 0, 0.8);
            if (!ost->resample) {
                fprintf(stderr, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
                        dec->channels, dec->sample_rate,
                        enc->channels, enc->sample_rate);
                ffmpeg_exit(1);
            }
        }
    }

#define MAKE_SFMT_PAIR(a,b) ((a)+AV_SAMPLE_FMT_NB*(b))
    if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt &&
        MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt)!=ost->reformat_pair) {
        if (ost->reformat_ctx)
            av_audio_convert_free(ost->reformat_ctx);
        ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
                                                   dec->sample_fmt, 1, NULL, 0);
        if (!ost->reformat_ctx) {
            fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",
                av_get_sample_fmt_name(dec->sample_fmt),
                av_get_sample_fmt_name(enc->sample_fmt));
            ffmpeg_exit(1);
        }
        ost->reformat_pair=MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
    }

    if(audio_sync_method){
        double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts
                - av_fifo_size(ost->fifo)/(enc->channels * 2);
        double idelta= delta*dec->sample_rate / enc->sample_rate;
        int byte_delta= ((int)idelta)*2*dec->channels;

        //FIXME resample delay
        if(fabs(delta) > 50){
            if(ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate){
                if(byte_delta < 0){
                    byte_delta= FFMAX(byte_delta, -size);
                    size += byte_delta;
                    buf  -= byte_delta;
                    if(verbose > 2)
                        fprintf(stderr, "discarding %d audio samples\n", (int)-delta);
                    if(!size)
                        return;
                    ist->is_start=0;
                }else{
                    static uint8_t *input_tmp= NULL;
                    input_tmp= av_realloc(input_tmp, byte_delta + size);

                    if(byte_delta > allocated_for_size - size){
                        allocated_for_size= byte_delta + (int64_t)size;
                        goto need_realloc;
                    }
                    ist->is_start=0;

                    memset(input_tmp, 0, byte_delta);
                    memcpy(input_tmp + byte_delta, buf, size);
                    buf= input_tmp;
                    size += byte_delta;
                    if(verbose > 2)
                        fprintf(stderr, "adding %d audio samples of silence\n", (int)delta);
                }
            }else if(audio_sync_method>1){
                int comp= av_clip(delta, -audio_sync_method, audio_sync_method);
                av_assert0(ost->audio_resample);
                if(verbose > 2)
                    fprintf(stderr, "compensating audio timestamp drift:%f compensation:%d in:%d\n", delta, comp, enc->sample_rate);
//                fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
                av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
            }
        }
    }else
        ost->sync_opts= lrintf(get_sync_ipts(ost) * enc->sample_rate)
                        - av_fifo_size(ost->fifo)/(enc->channels * 2); //FIXME wrong

    if (ost->audio_resample) {
        buftmp = audio_buf;
        size_out = audio_resample(ost->resample,
                                  (short *)buftmp, (short *)buf,
                                  size / (dec->channels * isize));
        size_out = size_out * enc->channels * osize;
    } else {
        buftmp = buf;
        size_out = size;
    }

    if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt) {
        const void *ibuf[6]= {buftmp};
        void *obuf[6]= {audio_buf};
        int istride[6]= {isize};
        int ostride[6]= {osize};
        int len= size_out/istride[0];
        if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
            printf("av_audio_convert() failed\n");
            if (exit_on_error)
                ffmpeg_exit(1);
            return;
        }
        buftmp = audio_buf;
        size_out = len*osize;
    }

    /* now encode as many frames as possible */
    if (enc->frame_size > 1) {
        /* output resampled raw samples */
        if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
            fprintf(stderr, "av_fifo_realloc2() failed\n");
            ffmpeg_exit(1);
        }
        av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);

        frame_bytes = enc->frame_size * osize * enc->channels;

        while (av_fifo_size(ost->fifo) >= frame_bytes) {
            AVPacket pkt;
            av_init_packet(&pkt);

            av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);

            //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()

            ret = avcodec_encode_audio(enc, audio_out, audio_out_size,
                                       (short *)audio_buf);
            if (ret < 0) {
                fprintf(stderr, "Audio encoding failed\n");
                ffmpeg_exit(1);
            }
            audio_size += ret;
            pkt.stream_index= ost->index;
            pkt.data= audio_out;
            pkt.size= ret;
            if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
                pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
            pkt.flags |= AV_PKT_FLAG_KEY;
            write_frame(s, &pkt, enc, ost->bitstream_filters);

            ost->sync_opts += enc->frame_size;
        }
    } else {
        AVPacket pkt;
        av_init_packet(&pkt);

        ost->sync_opts += size_out / (osize * enc->channels);

        /* output a pcm frame */
        /* determine the size of the coded buffer */
        size_out /= osize;
        if (coded_bps)
            size_out = size_out*coded_bps/8;

        if(size_out > audio_out_size){
            fprintf(stderr, "Internal error, buffer size too small\n");
            ffmpeg_exit(1);
        }

        //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
        ret = avcodec_encode_audio(enc, audio_out, size_out,
                                   (short *)buftmp);
        if (ret < 0) {
            fprintf(stderr, "Audio encoding failed\n");
            ffmpeg_exit(1);
        }
        audio_size += ret;
        pkt.stream_index= ost->index;
        pkt.data= audio_out;
        pkt.size= ret;
        if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
            pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
        pkt.flags |= AV_PKT_FLAG_KEY;
        write_frame(s, &pkt, enc, ost->bitstream_filters);
    }
}

static void pre_process_video_frame(AVInputStream *ist, AVPicture *picture, void **bufp)
{
    AVCodecContext *dec;
    AVPicture *picture2;
    AVPicture picture_tmp;
    uint8_t *buf = 0;

    dec = ist->st->codec;

    /* deinterlace : must be done before any resize */
    if (do_deinterlace) {
        int size;

        /* create temporary picture */
        size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
        buf = av_malloc(size);
        if (!buf)
            return;

        picture2 = &picture_tmp;
        avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);

        if(avpicture_deinterlace(picture2, picture,
                                 dec->pix_fmt, dec->width, dec->height) < 0) {
            /* if error, do not deinterlace */
            fprintf(stderr, "Deinterlacing failed\n");
            av_free(buf);
            buf = NULL;
            picture2 = picture;
        }
    } else {
        picture2 = picture;
    }

    if (picture != picture2)
        *picture = *picture2;
    *bufp = buf;
}

/* we begin to correct av delay at this threshold */
#define AV_DELAY_MAX 0.100

static void do_subtitle_out(AVFormatContext *s,
                            AVOutputStream *ost,
                            AVInputStream *ist,
                            AVSubtitle *sub,
                            int64_t pts)
{
    static uint8_t *subtitle_out = NULL;
    int subtitle_out_max_size = 1024 * 1024;
    int subtitle_out_size, nb, i;
    AVCodecContext *enc;
    AVPacket pkt;

    if (pts == AV_NOPTS_VALUE) {
        fprintf(stderr, "Subtitle packets must have a pts\n");
        if (exit_on_error)
            ffmpeg_exit(1);
        return;
    }

    enc = ost->st->codec;

    if (!subtitle_out) {
        subtitle_out = av_malloc(subtitle_out_max_size);
    }

    /* Note: DVB subtitle need one packet to draw them and one other
       packet to clear them */
    /* XXX: signal it in the codec context ? */
    if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
        nb = 2;
    else
        nb = 1;

    for(i = 0; i < nb; i++) {
        sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
        // start_display_time is required to be 0
        sub->pts              += av_rescale_q(sub->start_display_time, (AVRational){1, 1000}, AV_TIME_BASE_Q);
        sub->end_display_time -= sub->start_display_time;
        sub->start_display_time = 0;
        subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
                                                    subtitle_out_max_size, sub);
        if (subtitle_out_size < 0) {
            fprintf(stderr, "Subtitle encoding failed\n");
            ffmpeg_exit(1);
        }

        av_init_packet(&pkt);
        pkt.stream_index = ost->index;
        pkt.data = subtitle_out;
        pkt.size = subtitle_out_size;
        pkt.pts = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
        if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
            /* XXX: the pts correction is handled here. Maybe handling
               it in the codec would be better */
            if (i == 0)
                pkt.pts += 90 * sub->start_display_time;
            else
                pkt.pts += 90 * sub->end_display_time;
        }
        write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
    }
}

static int bit_buffer_size= 1024*256;
static uint8_t *bit_buffer= NULL;

static void do_video_out(AVFormatContext *s,
                         AVOutputStream *ost,
                         AVInputStream *ist,
                         AVFrame *in_picture,
                         int *frame_size)
{
    int nb_frames, i, ret;
    AVFrame *final_picture, *formatted_picture, *resampling_dst, *padding_src;
    AVCodecContext *enc, *dec;
    double sync_ipts;

    enc = ost->st->codec;
    dec = ist->st->codec;

    sync_ipts = get_sync_ipts(ost) / av_q2d(enc->time_base);

    /* by default, we output a single frame */
    nb_frames = 1;

    *frame_size = 0;

    if(video_sync_method){
        double vdelta = sync_ipts - ost->sync_opts;
        //FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
        if (vdelta < -1.1)
            nb_frames = 0;
        else if (video_sync_method == 2 || (video_sync_method<0 && (s->oformat->flags & AVFMT_VARIABLE_FPS))){
            if(vdelta<=-0.6){
                nb_frames=0;
            }else if(vdelta>0.6)
                ost->sync_opts= lrintf(sync_ipts);
        }else if (vdelta > 1.1)
            nb_frames = lrintf(vdelta);
//fprintf(stderr, "vdelta:%f, ost->sync_opts:%"PRId64", ost->sync_ipts:%f nb_frames:%d\n", vdelta, ost->sync_opts, get_sync_ipts(ost), nb_frames);
        if (nb_frames == 0){
            ++nb_frames_drop;
            if (verbose>2)
                fprintf(stderr, "*** drop!\n");
        }else if (nb_frames > 1) {
            nb_frames_dup += nb_frames - 1;
            if (verbose>2)
                fprintf(stderr, "*** %d dup!\n", nb_frames-1);
        }
    }else
        ost->sync_opts= lrintf(sync_ipts);

    nb_frames= FFMIN(nb_frames, max_frames[AVMEDIA_TYPE_VIDEO] - ost->frame_number);
    if (nb_frames <= 0)
        return;

    formatted_picture = in_picture;
    final_picture = formatted_picture;
    padding_src = formatted_picture;
    resampling_dst = &ost->pict_tmp;

    if (   ost->resample_height != ist->st->codec->height
        || ost->resample_width  != ist->st->codec->width
        || (ost->resample_pix_fmt!= ist->st->codec->pix_fmt) ) {

        fprintf(stderr,"Input Stream #%d.%d frame size changed to %dx%d, %s\n", ist->file_index, ist->index, ist->st->codec->width,     ist->st->codec->height,avcodec_get_pix_fmt_name(ist->st->codec->pix_fmt));
        if(!ost->video_resample)
            ffmpeg_exit(1);
    }

#if !CONFIG_AVFILTER
    if (ost->video_resample) {
        padding_src = NULL;
        final_picture = &ost->pict_tmp;
        if(  ost->resample_height != ist->st->codec->height
          || ost->resample_width  != ist->st->codec->width
          || (ost->resample_pix_fmt!= ist->st->codec->pix_fmt) ) {

            /* initialize a new scaler context */
            sws_freeContext(ost->img_resample_ctx);
            sws_flags = av_get_int(sws_opts, "sws_flags", NULL);
            ost->img_resample_ctx = sws_getContext(
                ist->st->codec->width,
                ist->st->codec->height,
                ist->st->codec->pix_fmt,
                ost->st->codec->width,
                ost->st->codec->height,
                ost->st->codec->pix_fmt,
                sws_flags, NULL, NULL, NULL);
            if (ost->img_resample_ctx == NULL) {
                fprintf(stderr, "Cannot get resampling context\n");
                ffmpeg_exit(1);
            }
        }
        sws_scale(ost->img_resample_ctx, formatted_picture->data, formatted_picture->linesize,
              0, ost->resample_height, resampling_dst->data, resampling_dst->linesize);
    }
#endif

    /* duplicates frame if needed */
    for(i=0;i<nb_frames;i++) {
        AVPacket pkt;
        av_init_packet(&pkt);
        pkt.stream_index= ost->index;

        if (s->oformat->flags & AVFMT_RAWPICTURE) {
            /* raw pictures are written as AVPicture structure to
               avoid any copies. We support temorarily the older
               method. */
            AVFrame* old_frame = enc->coded_frame;
            enc->coded_frame = dec->coded_frame; //FIXME/XXX remove this hack
            pkt.data= (uint8_t *)final_picture;
            pkt.size=  sizeof(AVPicture);
            pkt.pts= av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
            pkt.flags |= AV_PKT_FLAG_KEY;

            write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
            enc->coded_frame = old_frame;
        } else {
            AVFrame big_picture;

            big_picture= *final_picture;
            /* better than nothing: use input picture interlaced
               settings */
            big_picture.interlaced_frame = in_picture->interlaced_frame;
            if(avcodec_opts[AVMEDIA_TYPE_VIDEO]->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)){
                if(top_field_first == -1)
                    big_picture.top_field_first = in_picture->top_field_first;
                else
                    big_picture.top_field_first = top_field_first;
            }

            /* handles sameq here. This is not correct because it may
               not be a global option */
            big_picture.quality = same_quality ? ist->st->quality : ost->st->quality;
            if(!me_threshold)
                big_picture.pict_type = 0;
//            big_picture.pts = AV_NOPTS_VALUE;
            big_picture.pts= ost->sync_opts;
//            big_picture.pts= av_rescale(ost->sync_opts, AV_TIME_BASE*(int64_t)enc->time_base.num, enc->time_base.den);
//av_log(NULL, AV_LOG_DEBUG, "%"PRId64" -> encoder\n", ost->sync_opts);
            if (ost->forced_kf_index < ost->forced_kf_count &&
                big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
                big_picture.pict_type = FF_I_TYPE;
                ost->forced_kf_index++;
            }
            ret = avcodec_encode_video(enc,
                                       bit_buffer, bit_buffer_size,
                                       &big_picture);
            if (ret < 0) {
                fprintf(stderr, "Video encoding failed\n");
                ffmpeg_exit(1);
            }

            if(ret>0){
                pkt.data= bit_buffer;
                pkt.size= ret;
                if(enc->coded_frame->pts != AV_NOPTS_VALUE)
                    pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
/*av_log(NULL, AV_LOG_DEBUG, "encoder -> %"PRId64"/%"PRId64"\n",
   pkt.pts != AV_NOPTS_VALUE ? av_rescale(pkt.pts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1,
   pkt.dts != AV_NOPTS_VALUE ? av_rescale(pkt.dts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1);*/

                if(enc->coded_frame->key_frame)
                    pkt.flags |= AV_PKT_FLAG_KEY;
                write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);
                *frame_size = ret;
                video_size += ret;
                //fprintf(stderr,"\nFrame: %3d size: %5d type: %d",
                //        enc->frame_number-1, ret, enc->pict_type);
                /* if two pass, output log */
                if (ost->logfile && enc->stats_out) {
                    fprintf(ost->logfile, "%s", enc->stats_out);
                }
            }
        }
        ost->sync_opts++;
        ost->frame_number++;
    }
}

static double psnr(double d){
    return -10.0*log(d)/log(10.0);
}

static void do_video_stats(AVFormatContext *os, AVOutputStream *ost,
                           int frame_size)
{
    AVCodecContext *enc;
    int frame_number;
    double ti1, bitrate, avg_bitrate;

    /* this is executed just the first time do_video_stats is called */
    if (!vstats_file) {
        vstats_file = fopen(vstats_filename, "w");
        if (!vstats_file) {
            perror("fopen");
            ffmpeg_exit(1);
        }
    }

    enc = ost->st->codec;
    if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
        frame_number = ost->frame_number;
        fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality/(float)FF_QP2LAMBDA);
        if (enc->flags&CODEC_FLAG_PSNR)
            fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0]/(enc->width*enc->height*255.0*255.0)));

        fprintf(vstats_file,"f_size= %6d ", frame_size);
        /* compute pts value */
        ti1 = ost->sync_opts * av_q2d(enc->time_base);
        if (ti1 < 0.01)
            ti1 = 0.01;

        bitrate = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
        avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
        fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
            (double)video_size / 1024, ti1, bitrate, avg_bitrate);
        fprintf(vstats_file,"type= %c\n", av_get_pict_type_char(enc->coded_frame->pict_type));
    }
}

static void print_report(AVFormatContext **output_files,
                         AVOutputStream **ost_table, int nb_ostreams,
                         int is_last_report)
{
    char buf[1024];
    AVOutputStream *ost;
    AVFormatContext *oc;
    int64_t total_size;
    AVCodecContext *enc;
    int frame_number, vid, i;
    double bitrate, ti1, pts;
    static int64_t last_time = -1;
    static int qp_histogram[52];

    if (!is_last_report) {
        int64_t cur_time;
        /* display the report every 0.5 seconds */
        cur_time = av_gettime();
        if (last_time == -1) {
            last_time = cur_time;
            return;
        }
        if ((cur_time - last_time) < 500000)
            return;
        last_time = cur_time;
    }


    oc = output_files[0];

    total_size = url_fsize(oc->pb);
    if(total_size<0) // FIXME improve url_fsize() so it works with non seekable output too
        total_size= url_ftell(oc->pb);

    buf[0] = '\0';
    ti1 = 1e10;
    vid = 0;
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        enc = ost->st->codec;
        if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ",
                     !ost->st->stream_copy ?
                     enc->coded_frame->quality/(float)FF_QP2LAMBDA : -1);
        }
        if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
            float t = (av_gettime()-timer_start) / 1000000.0;

            frame_number = ost->frame_number;
            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
                     frame_number, (t>1)?(int)(frame_number/t+0.5) : 0,
                     !ost->st->stream_copy ?
                     enc->coded_frame->quality/(float)FF_QP2LAMBDA : -1);
            if(is_last_report)
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
            if(qp_hist){
                int j;
                int qp= lrintf(enc->coded_frame->quality/(float)FF_QP2LAMBDA);
                if(qp>=0 && qp<FF_ARRAY_ELEMS(qp_histogram))
                    qp_histogram[qp]++;
                for(j=0; j<32; j++)
                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j]+1)/log(2)));
            }
            if (enc->flags&CODEC_FLAG_PSNR){
                int j;
                double error, error_sum=0;
                double scale, scale_sum=0;
                char type[3]= {'Y','U','V'};
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
                for(j=0; j<3; j++){
                    if(is_last_report){
                        error= enc->error[j];
                        scale= enc->width*enc->height*255.0*255.0*frame_number;
                    }else{
                        error= enc->coded_frame->error[j];
                        scale= enc->width*enc->height*255.0*255.0;
                    }
                    if(j) scale/=4;
                    error_sum += error;
                    scale_sum += scale;
                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error/scale));
                }
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum/scale_sum));
            }
            vid = 1;
        }
        /* compute min output value */
        pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
        if ((pts < ti1) && (pts > 0))
            ti1 = pts;
    }
    if (ti1 < 0.01)
        ti1 = 0.01;

    if (verbose || is_last_report) {
        bitrate = (double)(total_size * 8) / ti1 / 1000.0;

        snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
            "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
            (double)total_size / 1024, ti1, bitrate);

        if (nb_frames_dup || nb_frames_drop)
          snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
                  nb_frames_dup, nb_frames_drop);

        if (verbose >= 0)
            fprintf(stderr, "%s    \r", buf);

        fflush(stderr);
    }

    if (is_last_report && verbose >= 0){
        int64_t raw= audio_size + video_size + extra_size;
        fprintf(stderr, "\n");
        fprintf(stderr, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
                video_size/1024.0,
                audio_size/1024.0,
                extra_size/1024.0,
                100.0*(total_size - raw)/raw
        );
    }
}

/* pkt = NULL means EOF (needed to flush decoder buffers) */
static int output_packet(AVInputStream *ist, int ist_index,
                         AVOutputStream **ost_table, int nb_ostreams,
                         const AVPacket *pkt)
{
    AVFormatContext *os;
    AVOutputStream *ost;
    int ret, i;
    int got_picture;
    AVFrame picture;
    void *buffer_to_free;
    static unsigned int samples_size= 0;
    AVSubtitle subtitle, *subtitle_to_free;
    int64_t pkt_pts = AV_NOPTS_VALUE;
#if CONFIG_AVFILTER
    int frame_available;
#endif

    AVPacket avpkt;
    int bps = av_get_bits_per_sample_fmt(ist->st->codec->sample_fmt)>>3;

    if(ist->next_pts == AV_NOPTS_VALUE)
        ist->next_pts= ist->pts;

    if (pkt == NULL) {
        /* EOF handling */
        av_init_packet(&avpkt);
        avpkt.data = NULL;
        avpkt.size = 0;
        goto handle_eof;
    } else {
        avpkt = *pkt;
    }

    if(pkt->dts != AV_NOPTS_VALUE)
        ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
    if(pkt->pts != AV_NOPTS_VALUE)
        pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);

    //while we have more to decode or while the decoder did output something on EOF
    while (avpkt.size > 0 || (!pkt && ist->next_pts != ist->pts)) {
        uint8_t *data_buf, *decoded_data_buf;
        int data_size, decoded_data_size;
    handle_eof:
        ist->pts= ist->next_pts;

        if(avpkt.size && avpkt.size != pkt->size &&
           ((!ist->showed_multi_packet_warning && verbose>0) || verbose>1)){
            fprintf(stderr, "Multiple frames in a packet from stream %d\n", pkt->stream_index);
            ist->showed_multi_packet_warning=1;
        }

        /* decode the packet if needed */
        decoded_data_buf = NULL; /* fail safe */
        decoded_data_size= 0;
        data_buf  = avpkt.data;
        data_size = avpkt.size;
        subtitle_to_free = NULL;
        if (ist->decoding_needed) {
            switch(ist->st->codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:{
                if(pkt && samples_size < FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE)) {
                    samples_size = FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE);
                    av_free(samples);
                    samples= av_malloc(samples_size);
                }
                decoded_data_size= samples_size;
                    /* XXX: could avoid copy if PCM 16 bits with same
                       endianness as CPU */
                ret = avcodec_decode_audio3(ist->st->codec, samples, &decoded_data_size,
                                            &avpkt);
                if (ret < 0)
                    goto fail_decode;
                avpkt.data += ret;
                avpkt.size -= ret;
                data_size   = ret;
                /* Some bug in mpeg audio decoder gives */
                /* decoded_data_size < 0, it seems they are overflows */
                if (decoded_data_size <= 0) {
                    /* no audio frame */
                    continue;
                }
                decoded_data_buf = (uint8_t *)samples;
                ist->next_pts += ((int64_t)AV_TIME_BASE/bps * decoded_data_size) /
                    (ist->st->codec->sample_rate * ist->st->codec->channels);
                break;}
            case AVMEDIA_TYPE_VIDEO:
                    decoded_data_size = (ist->st->codec->width * ist->st->codec->height * 3) / 2;
                    /* XXX: allocate picture correctly */
                    avcodec_get_frame_defaults(&picture);
                    ist->st->codec->reordered_opaque = pkt_pts;
                    pkt_pts = AV_NOPTS_VALUE;

                    ret = avcodec_decode_video2(ist->st->codec,
                                                &picture, &got_picture, &avpkt);
                    ist->st->quality= picture.quality;
                    if (ret < 0)
                        goto fail_decode;
                    if (!got_picture) {
                        /* no picture yet */
                        goto discard_packet;
                    }
                    ist->next_pts = ist->pts = guess_correct_pts(&ist->pts_ctx, picture.reordered_opaque, ist->pts);
                    if (ist->st->codec->time_base.num != 0) {
                        int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
                        ist->next_pts += ((int64_t)AV_TIME_BASE *
                                          ist->st->codec->time_base.num * ticks) /
                            ist->st->codec->time_base.den;
                    }
                    avpkt.size = 0;
                    break;
            case AVMEDIA_TYPE_SUBTITLE:
                ret = avcodec_decode_subtitle2(ist->st->codec,
                                               &subtitle, &got_picture, &avpkt);
                if (ret < 0)
                    goto fail_decode;
                if (!got_picture) {
                    goto discard_packet;
                }
                subtitle_to_free = &subtitle;
                avpkt.size = 0;
                break;
            default:
                goto fail_decode;
            }
        } else {
            switch(ist->st->codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                ist->next_pts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
                    ist->st->codec->sample_rate;
                break;
            case AVMEDIA_TYPE_VIDEO:
                if (ist->st->codec->time_base.num != 0) {
                    int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
                    ist->next_pts += ((int64_t)AV_TIME_BASE *
                                      ist->st->codec->time_base.num * ticks) /
                        ist->st->codec->time_base.den;
                }
                break;
            }
            ret = avpkt.size;
            avpkt.size = 0;
        }

        buffer_to_free = NULL;
        if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
            pre_process_video_frame(ist, (AVPicture *)&picture,
                                    &buffer_to_free);
        }

#if CONFIG_AVFILTER
        if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && ist->input_video_filter) {
            AVRational sar;
            if (ist->st->sample_aspect_ratio.num) sar = ist->st->sample_aspect_ratio;
            else                                  sar = ist->st->codec->sample_aspect_ratio;
            // add it to be filtered
            av_vsrc_buffer_add_frame(ist->input_video_filter, &picture,
                                     ist->pts,
                                     sar);
        }
#endif

        // preprocess audio (volume)
        if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
            if (audio_volume != 256) {
                short *volp;
                volp = samples;
                for(i=0;i<(decoded_data_size / sizeof(short));i++) {
                    int v = ((*volp) * audio_volume + 128) >> 8;
                    if (v < -32768) v = -32768;
                    if (v >  32767) v = 32767;
                    *volp++ = v;
                }
            }
        }

        /* frame rate emulation */
        if (rate_emu) {
            int64_t pts = av_rescale(ist->pts, 1000000, AV_TIME_BASE);
            int64_t now = av_gettime() - ist->start;
            if (pts > now)
                usleep(pts - now);
        }
#if CONFIG_AVFILTER
        frame_available = ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO ||
            !ist->output_video_filter || avfilter_poll_frame(ist->output_video_filter->inputs[0]);
#endif
        /* if output time reached then transcode raw format,
           encode packets and output them */
        if (start_time == 0 || ist->pts >= start_time)
#if CONFIG_AVFILTER
        while (frame_available) {
            AVRational ist_pts_tb;
            if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && ist->output_video_filter)
                get_filtered_video_frame(ist->output_video_filter, &picture, &ist->picref, &ist_pts_tb);
            if (ist->picref)
                ist->pts = av_rescale_q(ist->picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
#endif
            for(i=0;i<nb_ostreams;i++) {
                int frame_size;

                ost = ost_table[i];
                if (ost->source_index == ist_index) {
                    os = output_files[ost->file_index];

                    /* set the input output pts pairs */
                    //ost->sync_ipts = (double)(ist->pts + input_files_ts_offset[ist->file_index] - start_time)/ AV_TIME_BASE;

                    if (ost->encoding_needed) {
                        av_assert0(ist->decoding_needed);
                        switch(ost->st->codec->codec_type) {
                        case AVMEDIA_TYPE_AUDIO:
                            do_audio_out(os, ost, ist, decoded_data_buf, decoded_data_size);
                            break;
                        case AVMEDIA_TYPE_VIDEO:
#if CONFIG_AVFILTER
                            if (ist->picref->video)
                                ost->st->codec->sample_aspect_ratio = ist->picref->video->pixel_aspect;
#endif
                            do_video_out(os, ost, ist, &picture, &frame_size);
                            if (vstats_filename && frame_size)
                                do_video_stats(os, ost, frame_size);
                            break;
                        case AVMEDIA_TYPE_SUBTITLE:
                            do_subtitle_out(os, ost, ist, &subtitle,
                                            pkt->pts);
                            break;
                        default:
                            abort();
                        }
                    } else {
                        AVFrame avframe; //FIXME/XXX remove this
                        AVPacket opkt;
                        int64_t ost_tb_start_time= av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);

                        av_init_packet(&opkt);

                        if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) && !copy_initial_nonkeyframes)
                            continue;

                        /* no reencoding needed : output the packet directly */
                        /* force the input stream PTS */

                        avcodec_get_frame_defaults(&avframe);
                        ost->st->codec->coded_frame= &avframe;
                        avframe.key_frame = pkt->flags & AV_PKT_FLAG_KEY;

                        if(ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
                            audio_size += data_size;
                        else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
                            video_size += data_size;
                            ost->sync_opts++;
                        }

                        opkt.stream_index= ost->index;
                        if(pkt->pts != AV_NOPTS_VALUE)
                            opkt.pts= av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
                        else
                            opkt.pts= AV_NOPTS_VALUE;

                        if (pkt->dts == AV_NOPTS_VALUE)
                            opkt.dts = av_rescale_q(ist->pts, AV_TIME_BASE_Q, ost->st->time_base);
                        else
                            opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
                        opkt.dts -= ost_tb_start_time;

                        opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
                        opkt.flags= pkt->flags;

                        //FIXME remove the following 2 lines they shall be replaced by the bitstream filters
                        if(   ost->st->codec->codec_id != CODEC_ID_H264
                           && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
                           && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
                           ) {
                            if(av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, data_buf, data_size, pkt->flags & AV_PKT_FLAG_KEY))
                                opkt.destruct= av_destruct_packet;
                        } else {
                            opkt.data = data_buf;
                            opkt.size = data_size;
                        }

                        write_frame(os, &opkt, ost->st->codec, ost->bitstream_filters);
                        ost->st->codec->frame_number++;
                        ost->frame_number++;
                        av_free_packet(&opkt);
                    }
                }
            }

#if CONFIG_AVFILTER
            frame_available = (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) &&
                              ist->output_video_filter && avfilter_poll_frame(ist->output_video_filter->inputs[0]);
            if(ist->picref)
                avfilter_unref_buffer(ist->picref);
        }
#endif
        av_free(buffer_to_free);
        /* XXX: allocate the subtitles in the codec ? */
        if (subtitle_to_free) {
            avsubtitle_free(subtitle_to_free);
            subtitle_to_free = NULL;
        }
    }
 discard_packet:
    if (pkt == NULL) {
        /* EOF handling */

        for(i=0;i<nb_ostreams;i++) {
            ost = ost_table[i];
            if (ost->source_index == ist_index) {
                AVCodecContext *enc= ost->st->codec;
                os = output_files[ost->file_index];

                if(ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <=1)
                    continue;
                if(ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE))
                    continue;

                if (ost->encoding_needed) {
                    for(;;) {
                        AVPacket pkt;
                        int fifo_bytes;
                        av_init_packet(&pkt);
                        pkt.stream_index= ost->index;

                        switch(ost->st->codec->codec_type) {
                        case AVMEDIA_TYPE_AUDIO:
                            fifo_bytes = av_fifo_size(ost->fifo);
                            ret = 0;
                            /* encode any samples remaining in fifo */
                            if (fifo_bytes > 0) {
                                int osize = av_get_bits_per_sample_fmt(enc->sample_fmt) >> 3;
                                int fs_tmp = enc->frame_size;

                                av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);
                                if (enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
                                    enc->frame_size = fifo_bytes / (osize * enc->channels);
                                } else { /* pad */
                                    int frame_bytes = enc->frame_size*osize*enc->channels;
                                    if (allocated_audio_buf_size < frame_bytes)
                                        ffmpeg_exit(1);
                                    memset(audio_buf+fifo_bytes, 0, frame_bytes - fifo_bytes);
                                }

                                ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, (short *)audio_buf);
                                pkt.duration = av_rescale((int64_t)enc->frame_size*ost->st->time_base.den,
                                                          ost->st->time_base.num, enc->sample_rate);
                                enc->frame_size = fs_tmp;
                            }
                            if(ret <= 0) {
                                ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, NULL);
                            }
                            if (ret < 0) {
                                fprintf(stderr, "Audio encoding failed\n");
                                ffmpeg_exit(1);
                            }
                            audio_size += ret;
                            pkt.flags |= AV_PKT_FLAG_KEY;
                            break;
                        case AVMEDIA_TYPE_VIDEO:
                            ret = avcodec_encode_video(enc, bit_buffer, bit_buffer_size, NULL);
                            if (ret < 0) {
                                fprintf(stderr, "Video encoding failed\n");
                                ffmpeg_exit(1);
                            }
                            video_size += ret;
                            if(enc->coded_frame && enc->coded_frame->key_frame)
                                pkt.flags |= AV_PKT_FLAG_KEY;
                            if (ost->logfile && enc->stats_out) {
                                fprintf(ost->logfile, "%s", enc->stats_out);
                            }
                            break;
                        default:
                            ret=-1;
                        }

                        if(ret<=0)
                            break;
                        pkt.data= bit_buffer;
                        pkt.size= ret;
                        if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
                            pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
                        write_frame(os, &pkt, ost->st->codec, ost->bitstream_filters);
                    }
                }
            }
        }
    }

    return 0;
 fail_decode:
    return -1;
}

static void print_sdp(AVFormatContext **avc, int n)
{
    char sdp[2048];

    avf_sdp_create(avc, n, sdp, sizeof(sdp));
    printf("SDP:\n%s\n", sdp);
    fflush(stdout);
}

static int copy_chapters(int infile, int outfile)
{
    AVFormatContext *is = input_files[infile];
    AVFormatContext *os = output_files[outfile];
    int i;

    for (i = 0; i < is->nb_chapters; i++) {
        AVChapter *in_ch = is->chapters[i], *out_ch;
        int64_t ts_off   = av_rescale_q(start_time - input_files_ts_offset[infile],
                                      AV_TIME_BASE_Q, in_ch->time_base);
        int64_t rt       = (recording_time == INT64_MAX) ? INT64_MAX :
                           av_rescale_q(recording_time, AV_TIME_BASE_Q, in_ch->time_base);


        if (in_ch->end < ts_off)
            continue;
        if (rt != INT64_MAX && in_ch->start > rt + ts_off)
            break;

        out_ch = av_mallocz(sizeof(AVChapter));
        if (!out_ch)
            return AVERROR(ENOMEM);

        out_ch->id        = in_ch->id;
        out_ch->time_base = in_ch->time_base;
        out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
        out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);

        if (metadata_chapters_autocopy)
            av_metadata_copy(&out_ch->metadata, in_ch->metadata, 0);

        os->nb_chapters++;
        os->chapters = av_realloc(os->chapters, sizeof(AVChapter)*os->nb_chapters);
        if (!os->chapters)
            return AVERROR(ENOMEM);
        os->chapters[os->nb_chapters - 1] = out_ch;
    }
    return 0;
}

static void parse_forced_key_frames(char *kf, AVOutputStream *ost,
                                    AVCodecContext *avctx)
{
    char *p;
    int n = 1, i;
    int64_t t;

    for (p = kf; *p; p++)
        if (*p == ',')
            n++;
    ost->forced_kf_count = n;
    ost->forced_kf_pts = av_malloc(sizeof(*ost->forced_kf_pts) * n);
    if (!ost->forced_kf_pts) {
        av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
        ffmpeg_exit(1);
    }
    for (i = 0; i < n; i++) {
        p = i ? strchr(p, ',') + 1 : kf;
        t = parse_time_or_die("force_key_frames", p, 1);
        ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
    }
}

/*
 * The following code is the main loop of the file converter
 */
static int transcode(AVFormatContext **output_files,
                     int nb_output_files,
                     AVFormatContext **input_files,
                     int nb_input_files,
                     AVStreamMap *stream_maps, int nb_stream_maps)
{
    int ret = 0, i, j, k, n, nb_istreams = 0, nb_ostreams = 0;
    AVFormatContext *is, *os;
    AVCodecContext *codec, *icodec;
    AVOutputStream *ost, **ost_table = NULL;
    AVInputStream *ist, **ist_table = NULL;
    AVInputFile *file_table;
    char error[1024];
    int key;
    int want_sdp = 1;
    uint8_t no_packet[MAX_FILES]={0};
    int no_packet_count=0;

    file_table= av_mallocz(nb_input_files * sizeof(AVInputFile));
    if (!file_table)
        goto fail;

    /* input stream init */
    j = 0;
    for(i=0;i<nb_input_files;i++) {
        is = input_files[i];
        file_table[i].ist_index = j;
        file_table[i].nb_streams = is->nb_streams;
        j += is->nb_streams;
    }
    nb_istreams = j;

    ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
    if (!ist_table)
        goto fail;

    for(i=0;i<nb_istreams;i++) {
        ist = av_mallocz(sizeof(AVInputStream));
        if (!ist)
            goto fail;
        ist_table[i] = ist;
    }
    j = 0;
    for(i=0;i<nb_input_files;i++) {
        is = input_files[i];
        for(k=0;k<is->nb_streams;k++) {
            ist = ist_table[j++];
            ist->st = is->streams[k];
            ist->file_index = i;
            ist->index = k;
            ist->discard = 1; /* the stream is discarded by default
                                 (changed later) */

            if (rate_emu) {
                ist->start = av_gettime();
            }
        }
    }

    /* output stream init */
    nb_ostreams = 0;
    for(i=0;i<nb_output_files;i++) {
        os = output_files[i];
        if (!os->nb_streams && !(os->oformat->flags & AVFMT_NOSTREAMS)) {
            dump_format(output_files[i], i, output_files[i]->filename, 1);
            fprintf(stderr, "Output file #%d does not contain any stream\n", i);
            ret = AVERROR(EINVAL);
            goto fail;
        }
        nb_ostreams += os->nb_streams;
    }
    if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
        fprintf(stderr, "Number of stream maps must match number of output streams\n");
        ret = AVERROR(EINVAL);
        goto fail;
    }

    /* Sanity check the mapping args -- do the input files & streams exist? */
    for(i=0;i<nb_stream_maps;i++) {
        int fi = stream_maps[i].file_index;
        int si = stream_maps[i].stream_index;

        if (fi < 0 || fi > nb_input_files - 1 ||
            si < 0 || si > file_table[fi].nb_streams - 1) {
            fprintf(stderr,"Could not find input stream #%d.%d\n", fi, si);
            ret = AVERROR(EINVAL);
            goto fail;
        }
        fi = stream_maps[i].sync_file_index;
        si = stream_maps[i].sync_stream_index;
        if (fi < 0 || fi > nb_input_files - 1 ||
            si < 0 || si > file_table[fi].nb_streams - 1) {
            fprintf(stderr,"Could not find sync stream #%d.%d\n", fi, si);
            ret = AVERROR(EINVAL);
            goto fail;
        }
    }

    ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
    if (!ost_table)
        goto fail;
    n = 0;
    for(k=0;k<nb_output_files;k++) {
        os = output_files[k];
        for(i=0;i<os->nb_streams;i++,n++) {
            int found;
            ost = ost_table[n] = output_streams_for_file[k][i];
            ost->st = os->streams[i];
            if (nb_stream_maps > 0) {
                ost->source_index = file_table[stream_maps[n].file_index].ist_index +
                    stream_maps[n].stream_index;

                /* Sanity check that the stream types match */
                if (ist_table[ost->source_index]->st->codec->codec_type != ost->st->codec->codec_type) {
                    int i= ost->file_index;
                    dump_format(output_files[i], i, output_files[i]->filename, 1);
                    fprintf(stderr, "Codec type mismatch for mapping #%d.%d -> #%d.%d\n",
                        stream_maps[n].file_index, stream_maps[n].stream_index,
                        ost->file_index, ost->index);
                    ffmpeg_exit(1);
                }

            } else {
                int best_nb_frames=-1;
                /* get corresponding input stream index : we select the first one with the right type */
                found = 0;
                for(j=0;j<nb_istreams;j++) {
                    int skip=0;
                    ist = ist_table[j];
                    if(opt_programid){
                        int pi,si;
                        AVFormatContext *f= input_files[ ist->file_index ];
                        skip=1;
                        for(pi=0; pi<f->nb_programs; pi++){
                            AVProgram *p= f->programs[pi];
                            if(p->id == opt_programid)
                                for(si=0; si<p->nb_stream_indexes; si++){
                                    if(f->streams[ p->stream_index[si] ] == ist->st)
                                        skip=0;
                                }
                        }
                    }
                    if (ist->discard && ist->st->discard != AVDISCARD_ALL && !skip &&
                        ist->st->codec->codec_type == ost->st->codec->codec_type) {
                        if(best_nb_frames < ist->st->codec_info_nb_frames){
                            best_nb_frames= ist->st->codec_info_nb_frames;
                            ost->source_index = j;
                            found = 1;
                        }
                    }
                }

                if (!found) {
                    if(! opt_programid) {
                        /* try again and reuse existing stream */
                        for(j=0;j<nb_istreams;j++) {
                            ist = ist_table[j];
                            if (   ist->st->codec->codec_type == ost->st->codec->codec_type
                                && ist->st->discard != AVDISCARD_ALL) {
                                ost->source_index = j;
                                found = 1;
                            }
                        }
                    }
                    if (!found) {
                        int i= ost->file_index;
                        dump_format(output_files[i], i, output_files[i]->filename, 1);
                        fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
                                ost->file_index, ost->index);
                        ffmpeg_exit(1);
                    }
                }
            }
            ist = ist_table[ost->source_index];
            ist->discard = 0;
            ost->sync_ist = (nb_stream_maps > 0) ?
                ist_table[file_table[stream_maps[n].sync_file_index].ist_index +
                         stream_maps[n].sync_stream_index] : ist;
        }
    }

    /* for each output stream, we compute the right encoding parameters */
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        os = output_files[ost->file_index];
        ist = ist_table[ost->source_index];

        codec = ost->st->codec;
        icodec = ist->st->codec;

        if (metadata_streams_autocopy)
            av_metadata_copy(&ost->st->metadata, ist->st->metadata,
                             AV_METADATA_DONT_OVERWRITE);

        ost->st->disposition = ist->st->disposition;
        codec->bits_per_raw_sample= icodec->bits_per_raw_sample;
        codec->chroma_sample_location = icodec->chroma_sample_location;

        if (ost->st->stream_copy) {
            uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;

            if (extra_size > INT_MAX)
                goto fail;

            /* if stream_copy is selected, no need to decode or encode */
            codec->codec_id = icodec->codec_id;
            codec->codec_type = icodec->codec_type;

            if(!codec->codec_tag){
                if(   !os->oformat->codec_tag
                   || av_codec_get_id (os->oformat->codec_tag, icodec->codec_tag) == codec->codec_id
                   || av_codec_get_tag(os->oformat->codec_tag, icodec->codec_id) <= 0)
                    codec->codec_tag = icodec->codec_tag;
            }

            codec->bit_rate = icodec->bit_rate;
            codec->rc_max_rate    = icodec->rc_max_rate;
            codec->rc_buffer_size = icodec->rc_buffer_size;
            codec->extradata= av_mallocz(extra_size);
            if (!codec->extradata)
                goto fail;
            memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
            codec->extradata_size= icodec->extradata_size;
            if(!copy_tb && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base) && av_q2d(ist->st->time_base) < 1.0/500){
                codec->time_base = icodec->time_base;
                codec->time_base.num *= icodec->ticks_per_frame;
                av_reduce(&codec->time_base.num, &codec->time_base.den,
                          codec->time_base.num, codec->time_base.den, INT_MAX);
            }else
                codec->time_base = ist->st->time_base;
            switch(codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                if(audio_volume != 256) {
                    fprintf(stderr,"-acodec copy and -vol are incompatible (frames are not decoded)\n");
                    ffmpeg_exit(1);
                }
                codec->channel_layout = icodec->channel_layout;
                codec->sample_rate = icodec->sample_rate;
                codec->channels = icodec->channels;
                codec->frame_size = icodec->frame_size;
                codec->block_align= icodec->block_align;
                if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
                    codec->block_align= 0;
                if(codec->codec_id == CODEC_ID_AC3)
                    codec->block_align= 0;
                break;
            case AVMEDIA_TYPE_VIDEO:
                codec->pix_fmt = icodec->pix_fmt;
                codec->width = icodec->width;
                codec->height = icodec->height;
                codec->has_b_frames = icodec->has_b_frames;
                break;
            case AVMEDIA_TYPE_SUBTITLE:
                codec->width = icodec->width;
                codec->height = icodec->height;
                break;
            default:
                abort();
            }
        } else {
            switch(codec->codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                ost->fifo= av_fifo_alloc(1024);
                if(!ost->fifo)
                    goto fail;
                ost->reformat_pair = MAKE_SFMT_PAIR(AV_SAMPLE_FMT_NONE,AV_SAMPLE_FMT_NONE);
                ost->audio_resample = codec->sample_rate != icodec->sample_rate || audio_sync_method > 1;
                icodec->request_channels = codec->channels;
                ist->decoding_needed = 1;
                ost->encoding_needed = 1;
                ost->resample_sample_fmt  = icodec->sample_fmt;
                ost->resample_sample_rate = icodec->sample_rate;
                ost->resample_channels    = icodec->channels;
                break;
            case AVMEDIA_TYPE_VIDEO:
                if (ost->st->codec->pix_fmt == PIX_FMT_NONE) {
                    fprintf(stderr, "Video pixel format is unknown, stream cannot be encoded\n");
                    ffmpeg_exit(1);
                }
                ost->video_resample = (codec->width != icodec->width   ||
                                       codec->height != icodec->height ||
                        (codec->pix_fmt != icodec->pix_fmt));
                if (ost->video_resample) {
#if !CONFIG_AVFILTER
                    avcodec_get_frame_defaults(&ost->pict_tmp);
                    if(avpicture_alloc((AVPicture*)&ost->pict_tmp, codec->pix_fmt,
                                         codec->width, codec->height)) {
                        fprintf(stderr, "Cannot allocate temp picture, check pix fmt\n");
                        ffmpeg_exit(1);
                    }
                    sws_flags = av_get_int(sws_opts, "sws_flags", NULL);
                    ost->img_resample_ctx = sws_getContext(
                        icodec->width,
                        icodec->height,
                            icodec->pix_fmt,
                            codec->width,
                            codec->height,
                            codec->pix_fmt,
                            sws_flags, NULL, NULL, NULL);
                    if (ost->img_resample_ctx == NULL) {
                        fprintf(stderr, "Cannot get resampling context\n");
                        ffmpeg_exit(1);
                    }

                    ost->original_height = icodec->height;
                    ost->original_width  = icodec->width;
#endif
                    codec->bits_per_raw_sample= 0;
                }
                ost->resample_height = icodec->height;
                ost->resample_width  = icodec->width;
                ost->resample_pix_fmt= icodec->pix_fmt;
                ost->encoding_needed = 1;
                ist->decoding_needed = 1;

#if CONFIG_AVFILTER
                if (configure_filters(ist, ost)) {
                    fprintf(stderr, "Error opening filters!\n");
                    exit(1);
                }
#endif
                break;
            case AVMEDIA_TYPE_SUBTITLE:
                ost->encoding_needed = 1;
                ist->decoding_needed = 1;
                break;
            default:
                abort();
                break;
            }
            /* two pass mode */
            if (ost->encoding_needed &&
                (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
                char logfilename[1024];
                FILE *f;

                snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
                         pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
                         i);
                if (codec->flags & CODEC_FLAG_PASS1) {
                    f = fopen(logfilename, "wb");
                    if (!f) {
                        fprintf(stderr, "Cannot write log file '%s' for pass-1 encoding: %s\n", logfilename, strerror(errno));
                        ffmpeg_exit(1);
                    }
                    ost->logfile = f;
                } else {
                    char  *logbuffer;
                    size_t logbuffer_size;
                    if (read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
                        fprintf(stderr, "Error reading log file '%s' for pass-2 encoding\n", logfilename);
                        ffmpeg_exit(1);
                    }
                    codec->stats_in = logbuffer;
                }
            }
        }
        if(codec->codec_type == AVMEDIA_TYPE_VIDEO){
            int size= codec->width * codec->height;
            bit_buffer_size= FFMAX(bit_buffer_size, 6*size + 200);
        }
    }

    if (!bit_buffer)
        bit_buffer = av_malloc(bit_buffer_size);
    if (!bit_buffer) {
        fprintf(stderr, "Cannot allocate %d bytes output buffer\n",
                bit_buffer_size);
        ret = AVERROR(ENOMEM);
        goto fail;
    }

    /* open each encoder */
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        if (ost->encoding_needed) {
            AVCodec *codec = i < nb_output_codecs ? output_codecs[i] : NULL;
            AVCodecContext *dec = ist_table[ost->source_index]->st->codec;
            if (!codec)
                codec = avcodec_find_encoder(ost->st->codec->codec_id);
            if (!codec) {
                snprintf(error, sizeof(error), "Encoder (codec id %d) not found for output stream #%d.%d",
                         ost->st->codec->codec_id, ost->file_index, ost->index);
                ret = AVERROR(EINVAL);
                goto dump_format;
            }
            if (dec->subtitle_header) {
                ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
                if (!ost->st->codec->subtitle_header) {
                    ret = AVERROR(ENOMEM);
                    goto dump_format;
                }
                memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
                ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
            }
            if (avcodec_open(ost->st->codec, codec) < 0) {
                snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height",
                        ost->file_index, ost->index);
                ret = AVERROR(EINVAL);
                goto dump_format;
            }
            extra_size += ost->st->codec->extradata_size;
        }
    }

    /* open each decoder */
    for(i=0;i<nb_istreams;i++) {
        ist = ist_table[i];
        if (ist->decoding_needed) {
            AVCodec *codec = i < nb_input_codecs ? input_codecs[i] : NULL;
            if (!codec)
                codec = avcodec_find_decoder(ist->st->codec->codec_id);
            if (!codec) {
                snprintf(error, sizeof(error), "Decoder (codec id %d) not found for input stream #%d.%d",
                        ist->st->codec->codec_id, ist->file_index, ist->index);
                ret = AVERROR(EINVAL);
                goto dump_format;
            }
            if (avcodec_open(ist->st->codec, codec) < 0) {
                snprintf(error, sizeof(error), "Error while opening decoder for input stream #%d.%d",
                        ist->file_index, ist->index);
                ret = AVERROR(EINVAL);
                goto dump_format;
            }
            //if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
            //    ist->st->codec->flags |= CODEC_FLAG_REPEAT_FIELD;
        }
    }

    /* init pts */
    for(i=0;i<nb_istreams;i++) {
        AVStream *st;
        ist = ist_table[i];
        st= ist->st;
        ist->pts = st->avg_frame_rate.num ? - st->codec->has_b_frames*AV_TIME_BASE / av_q2d(st->avg_frame_rate) : 0;
        ist->next_pts = AV_NOPTS_VALUE;
        init_pts_correction(&ist->pts_ctx);
        ist->is_start = 1;
    }

    /* set meta data information from input file if required */
    for (i=0;i<nb_meta_data_maps;i++) {
        AVFormatContext *files[2];
        AVMetadata      **meta[2];
        int j;

#define METADATA_CHECK_INDEX(index, nb_elems, desc)\
        if ((index) < 0 || (index) >= (nb_elems)) {\
            snprintf(error, sizeof(error), "Invalid %s index %d while processing metadata maps\n",\
                     (desc), (index));\
            ret = AVERROR(EINVAL);\
            goto dump_format;\
        }

        int out_file_index = meta_data_maps[i][0].file;
        int in_file_index = meta_data_maps[i][1].file;
        if (in_file_index < 0 || out_file_index < 0)
            continue;
        METADATA_CHECK_INDEX(out_file_index, nb_output_files, "output file")
        METADATA_CHECK_INDEX(in_file_index, nb_input_files, "input file")

        files[0] = output_files[out_file_index];
        files[1] = input_files[in_file_index];

        for (j = 0; j < 2; j++) {
            AVMetaDataMap *map = &meta_data_maps[i][j];

            switch (map->type) {
            case 'g':
                meta[j] = &files[j]->metadata;
                break;
            case 's':
                METADATA_CHECK_INDEX(map->index, files[j]->nb_streams, "stream")
                meta[j] = &files[j]->streams[map->index]->metadata;
                break;
            case 'c':
                METADATA_CHECK_INDEX(map->index, files[j]->nb_chapters, "chapter")
                meta[j] = &files[j]->chapters[map->index]->metadata;
                break;
            case 'p':
                METADATA_CHECK_INDEX(map->index, files[j]->nb_programs, "program")
                meta[j] = &files[j]->programs[map->index]->metadata;
                break;
            }
        }

        av_metadata_copy(meta[0], *meta[1], AV_METADATA_DONT_OVERWRITE);
    }

    /* copy global metadata by default */
    if (metadata_global_autocopy) {

        for (i = 0; i < nb_output_files; i++)
            av_metadata_copy(&output_files[i]->metadata, input_files[0]->metadata,
                             AV_METADATA_DONT_OVERWRITE);
    }

    /* copy chapters according to chapter maps */
    for (i = 0; i < nb_chapter_maps; i++) {
        int infile  = chapter_maps[i].in_file;
        int outfile = chapter_maps[i].out_file;

        if (infile < 0 || outfile < 0)
            continue;
        if (infile >= nb_input_files) {
            snprintf(error, sizeof(error), "Invalid input file index %d in chapter mapping.\n", infile);
            ret = AVERROR(EINVAL);
            goto dump_format;
        }
        if (outfile >= nb_output_files) {
            snprintf(error, sizeof(error), "Invalid output file index %d in chapter mapping.\n",outfile);
            ret = AVERROR(EINVAL);
            goto dump_format;
        }
        copy_chapters(infile, outfile);
    }

    /* copy chapters from the first input file that has them*/
    if (!nb_chapter_maps)
        for (i = 0; i < nb_input_files; i++) {
            if (!input_files[i]->nb_chapters)
                continue;

            for (j = 0; j < nb_output_files; j++)
                if ((ret = copy_chapters(i, j)) < 0)
                    goto dump_format;
            break;
        }

    /* open files and write file headers */
    for(i=0;i<nb_output_files;i++) {
        os = output_files[i];
        if (av_write_header(os) < 0) {
            snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);
            ret = AVERROR(EINVAL);
            goto dump_format;
        }
        if (strcmp(output_files[i]->oformat->name, "rtp")) {
            want_sdp = 0;
        }
    }

 dump_format:
    /* dump the file output parameters - cannot be done before in case
       of stream copy */
    for(i=0;i<nb_output_files;i++) {
        dump_format(output_files[i], i, output_files[i]->filename, 1);
    }

    /* dump the stream mapping */
    if (verbose >= 0) {
        fprintf(stderr, "Stream mapping:\n");
        for(i=0;i<nb_ostreams;i++) {
            ost = ost_table[i];
            fprintf(stderr, "  Stream #%d.%d -> #%d.%d",
                    ist_table[ost->source_index]->file_index,
                    ist_table[ost->source_index]->index,
                    ost->file_index,
                    ost->index);
            if (ost->sync_ist != ist_table[ost->source_index])
                fprintf(stderr, " [sync #%d.%d]",
                        ost->sync_ist->file_index,
                        ost->sync_ist->index);
            fprintf(stderr, "\n");
        }
    }

    if (ret) {
        fprintf(stderr, "%s\n", error);
        goto fail;
    }

    if (want_sdp) {
        print_sdp(output_files, nb_output_files);
    }

    if (!using_stdin && verbose >= 0) {
        fprintf(stderr, "Press [q] to stop encoding\n");
        url_set_interrupt_cb(decode_interrupt_cb);
    }
    term_init();

    timer_start = av_gettime();

    for(; received_sigterm == 0;) {
        int file_index, ist_index;
        AVPacket pkt;
        double ipts_min;
        double opts_min;

    redo:
        ipts_min= 1e100;
        opts_min= 1e100;
        /* if 'q' pressed, exits */
        if (!using_stdin) {
            if (q_pressed)
                break;
            /* read_key() returns 0 on EOF */
            key = read_key();
            if (key == 'q')
                break;
        }

        /* select the stream that we must read now by looking at the
           smallest output pts */
        file_index = -1;
        for(i=0;i<nb_ostreams;i++) {
            double ipts, opts;
            ost = ost_table[i];
            os = output_files[ost->file_index];
            ist = ist_table[ost->source_index];
            if(ist->is_past_recording_time || no_packet[ist->file_index])
                continue;
                opts = ost->st->pts.val * av_q2d(ost->st->time_base);
            ipts = (double)ist->pts;
            if (!file_table[ist->file_index].eof_reached){
                if(ipts < ipts_min) {
                    ipts_min = ipts;
                    if(input_sync ) file_index = ist->file_index;
                }
                if(opts < opts_min) {
                    opts_min = opts;
                    if(!input_sync) file_index = ist->file_index;
                }
            }
            if(ost->frame_number >= max_frames[ost->st->codec->codec_type]){
                file_index= -1;
                break;
            }
        }
        /* if none, if is finished */
        if (file_index < 0) {
            if(no_packet_count){
                no_packet_count=0;
                memset(no_packet, 0, sizeof(no_packet));
                usleep(10000);
                continue;
            }
            break;
        }

        /* finish if limit size exhausted */
        if (limit_filesize != 0 && limit_filesize <= url_ftell(output_files[0]->pb))
            break;

        /* read a frame from it and output it in the fifo */
        is = input_files[file_index];
        ret= av_read_frame(is, &pkt);
        if(ret == AVERROR(EAGAIN)){
            no_packet[file_index]=1;
            no_packet_count++;
            continue;
        }
        if (ret < 0) {
            file_table[file_index].eof_reached = 1;
            if (opt_shortest)
                break;
            else
                continue;
        }

        no_packet_count=0;
        memset(no_packet, 0, sizeof(no_packet));

        if (do_pkt_dump) {
            av_pkt_dump_log(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump);
        }
        /* the following test is needed in case new streams appear
           dynamically in stream : we ignore them */
        if (pkt.stream_index >= file_table[file_index].nb_streams)
            goto discard_packet;
        ist_index = file_table[file_index].ist_index + pkt.stream_index;
        ist = ist_table[ist_index];
        if (ist->discard)
            goto discard_packet;

        if (pkt.dts != AV_NOPTS_VALUE)
            pkt.dts += av_rescale_q(input_files_ts_offset[ist->file_index], AV_TIME_BASE_Q, ist->st->time_base);
        if (pkt.pts != AV_NOPTS_VALUE)
            pkt.pts += av_rescale_q(input_files_ts_offset[ist->file_index], AV_TIME_BASE_Q, ist->st->time_base);

        if (pkt.stream_index < nb_input_files_ts_scale[file_index]
            && input_files_ts_scale[file_index][pkt.stream_index]){
            if(pkt.pts != AV_NOPTS_VALUE)
                pkt.pts *= input_files_ts_scale[file_index][pkt.stream_index];
            if(pkt.dts != AV_NOPTS_VALUE)
                pkt.dts *= input_files_ts_scale[file_index][pkt.stream_index];
        }

//        fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n", ist->next_pts, pkt.dts, input_files_ts_offset[ist->file_index], ist->st->codec->codec_type);
        if (pkt.dts != AV_NOPTS_VALUE && ist->next_pts != AV_NOPTS_VALUE
            && (is->iformat->flags & AVFMT_TS_DISCONT)) {
            int64_t pkt_dts= av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
            int64_t delta= pkt_dts - ist->next_pts;
            if((FFABS(delta) > 1LL*dts_delta_threshold*AV_TIME_BASE || pkt_dts+1<ist->pts)&& !copy_ts){
                input_files_ts_offset[ist->file_index]-= delta;
                if (verbose > 2)
                    fprintf(stderr, "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n", delta, input_files_ts_offset[ist->file_index]);
                pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
                if(pkt.pts != AV_NOPTS_VALUE)
                    pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
            }
        }

        /* finish if recording time exhausted */
        if (recording_time != INT64_MAX &&
            av_compare_ts(pkt.pts, ist->st->time_base, recording_time + start_time, (AVRational){1, 1000000}) >= 0) {
            ist->is_past_recording_time = 1;
            goto discard_packet;
        }

        //fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size);
        if (output_packet(ist, ist_index, ost_table, nb_ostreams, &pkt) < 0) {

            if (verbose >= 0)
                fprintf(stderr, "Error while decoding stream #%d.%d\n",
                        ist->file_index, ist->index);
            if (exit_on_error)
                ffmpeg_exit(1);
            av_free_packet(&pkt);
            goto redo;
        }

    discard_packet:
        av_free_packet(&pkt);

        /* dump report by using the output first video and audio streams */
        print_report(output_files, ost_table, nb_ostreams, 0);
    }

    /* at the end of stream, we must flush the decoder buffers */
    for(i=0;i<nb_istreams;i++) {
        ist = ist_table[i];
        if (ist->decoding_needed) {
            output_packet(ist, i, ost_table, nb_ostreams, NULL);
        }
    }

    term_exit();

    /* write the trailer if needed and close file */
    for(i=0;i<nb_output_files;i++) {
        os = output_files[i];
        av_write_trailer(os);
    }

    /* dump report by using the first video and audio streams */
    print_report(output_files, ost_table, nb_ostreams, 1);

    /* close each encoder */
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        if (ost->encoding_needed) {
            av_freep(&ost->st->codec->stats_in);
            avcodec_close(ost->st->codec);
        }
    }

    /* close each decoder */
    for(i=0;i<nb_istreams;i++) {
        ist = ist_table[i];
        if (ist->decoding_needed) {
            avcodec_close(ist->st->codec);
        }
    }
#if CONFIG_AVFILTER
    if (graph) {
        avfilter_graph_free(graph);
        av_freep(&graph);
    }
#endif

    /* finished ! */
    ret = 0;

 fail:
    av_freep(&bit_buffer);
    av_free(file_table);

    if (ist_table) {
        for(i=0;i<nb_istreams;i++) {
            ist = ist_table[i];
            av_free(ist);
        }
        av_free(ist_table);
    }
    if (ost_table) {
        for(i=0;i<nb_ostreams;i++) {
            ost = ost_table[i];
            if (ost) {
                if (ost->st->stream_copy)
                    av_freep(&ost->st->codec->extradata);
                if (ost->logfile) {
                    fclose(ost->logfile);
                    ost->logfile = NULL;
                }
                av_fifo_free(ost->fifo); /* works even if fifo is not
                                             initialized but set to zero */
                av_freep(&ost->st->codec->subtitle_header);
                av_free(ost->pict_tmp.data[0]);
                av_free(ost->forced_kf_pts);
                if (ost->video_resample)
                    sws_freeContext(ost->img_resample_ctx);
                if (ost->resample)
                    audio_resample_close(ost->resample);
                if (ost->reformat_ctx)
                    av_audio_convert_free(ost->reformat_ctx);
                av_free(ost);
            }
        }
        av_free(ost_table);
    }
    return ret;
}

static void opt_format(const char *arg)
{
    last_asked_format = arg;
}

static void opt_video_rc_override_string(const char *arg)
{
    video_rc_override_string = arg;
}

static int opt_me_threshold(const char *opt, const char *arg)
{
    me_threshold = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
    return 0;
}

static int opt_verbose(const char *opt, const char *arg)
{
    verbose = parse_number_or_die(opt, arg, OPT_INT64, -10, 10);
    return 0;
}

static int opt_frame_rate(const char *opt, const char *arg)
{
    if (av_parse_video_rate(&frame_rate, arg) < 0) {
        fprintf(stderr, "Incorrect value for %s: %s\n", opt, arg);
        ffmpeg_exit(1);
    }
    return 0;
}

static int opt_bitrate(const char *opt, const char *arg)
{
    int codec_type = opt[0]=='a' ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;

    opt_default(opt, arg);

    if (av_get_int(avcodec_opts[codec_type], "b", NULL) < 1000)
        fprintf(stderr, "WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s\n");

    return 0;
}

static int opt_frame_crop(const char *opt, const char *arg)
{
    fprintf(stderr, "Option '%s' has been removed, use the crop filter instead\n", opt);
    return AVERROR(EINVAL);
}

static void opt_frame_size(const char *arg)
{
    if (av_parse_video_size(&frame_width, &frame_height, arg) < 0) {
        fprintf(stderr, "Incorrect frame size\n");
        ffmpeg_exit(1);
    }
}

static int opt_pad(const char *opt, const char *arg) {
    fprintf(stderr, "Option '%s' has been removed, use the pad filter instead\n", opt);
    return -1;
}

static void opt_frame_pix_fmt(const char *arg)
{
    if (strcmp(arg, "list")) {
        frame_pix_fmt = av_get_pix_fmt(arg);
        if (frame_pix_fmt == PIX_FMT_NONE) {
            fprintf(stderr, "Unknown pixel format requested: %s\n", arg);
            ffmpeg_exit(1);
        }
    } else {
        show_pix_fmts();
        ffmpeg_exit(0);
    }
}

static void opt_frame_aspect_ratio(const char *arg)
{
    int x = 0, y = 0;
    double ar = 0;
    const char *p;
    char *end;

    p = strchr(arg, ':');
    if (p) {
        x = strtol(arg, &end, 10);
        if (end == p)
            y = strtol(end+1, &end, 10);
        if (x > 0 && y > 0)
            ar = (double)x / (double)y;
    } else
        ar = strtod(arg, NULL);

    if (!ar) {
        fprintf(stderr, "Incorrect aspect ratio specification.\n");
        ffmpeg_exit(1);
    }
    frame_aspect_ratio = ar;
}

static int opt_metadata(const char *opt, const char *arg)
{
    char *mid= strchr(arg, '=');

    if(!mid){
        fprintf(stderr, "Missing =\n");
        ffmpeg_exit(1);
    }
    *mid++= 0;

    av_metadata_set2(&metadata, arg, mid, 0);

    return 0;
}

static void opt_qscale(const char *arg)
{
    video_qscale = atof(arg);
    if (video_qscale <= 0 ||
        video_qscale > 255) {
        fprintf(stderr, "qscale must be > 0.0 and <= 255\n");
        ffmpeg_exit(1);
    }
}

static void opt_top_field_first(const char *arg)
{
    top_field_first= atoi(arg);
}

static int opt_thread_count(const char *opt, const char *arg)
{
    thread_count= parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
#if !HAVE_THREADS
    if (verbose >= 0)
        fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
#endif
    return 0;
}

static void opt_audio_sample_fmt(const char *arg)
{
    if (strcmp(arg, "list")) {
        audio_sample_fmt = av_get_sample_fmt(arg);
        if (audio_sample_fmt == AV_SAMPLE_FMT_NONE) {
            av_log(NULL, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg);
            ffmpeg_exit(1);
        }
    } else {
        list_fmts(av_get_sample_fmt_string, AV_SAMPLE_FMT_NB);
        ffmpeg_exit(0);
    }
}

static int opt_audio_rate(const char *opt, const char *arg)
{
    audio_sample_rate = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
    return 0;
}

static int opt_audio_channels(const char *opt, const char *arg)
{
    audio_channels = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
    return 0;
}

static void opt_video_channel(const char *arg)
{
    video_channel = strtol(arg, NULL, 0);
}

static void opt_video_standard(const char *arg)
{
    video_standard = av_strdup(arg);
}

static void opt_codec(int *pstream_copy, char **pcodec_name,
                      int codec_type, const char *arg)
{
    av_freep(pcodec_name);
    if (!strcmp(arg, "copy")) {
        *pstream_copy = 1;
    } else {
        *pcodec_name = av_strdup(arg);
    }
}

static void opt_audio_codec(const char *arg)
{
    opt_codec(&audio_stream_copy, &audio_codec_name, AVMEDIA_TYPE_AUDIO, arg);
}

static void opt_video_codec(const char *arg)
{
    opt_codec(&video_stream_copy, &video_codec_name, AVMEDIA_TYPE_VIDEO, arg);
}

static void opt_subtitle_codec(const char *arg)
{
    opt_codec(&subtitle_stream_copy, &subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, arg);
}

static int opt_codec_tag(const char *opt, const char *arg)
{
    char *tail;
    uint32_t *codec_tag;

    codec_tag = !strcmp(opt, "atag") ? &audio_codec_tag :
                !strcmp(opt, "vtag") ? &video_codec_tag :
                !strcmp(opt, "stag") ? &subtitle_codec_tag : NULL;
    if (!codec_tag)
        return -1;

    *codec_tag = strtol(arg, &tail, 0);
    if (!tail || *tail)
        *codec_tag = AV_RL32(arg);

    return 0;
}

static void opt_map(const char *arg)
{
    AVStreamMap *m;
    char *p;

    stream_maps = grow_array(stream_maps, sizeof(*stream_maps), &nb_stream_maps, nb_stream_maps + 1);
    m = &stream_maps[nb_stream_maps-1];

    m->file_index = strtol(arg, &p, 0);
    if (*p)
        p++;

    m->stream_index = strtol(p, &p, 0);
    if (*p) {
        p++;
        m->sync_file_index = strtol(p, &p, 0);
        if (*p)
            p++;
        m->sync_stream_index = strtol(p, &p, 0);
    } else {
        m->sync_file_index = m->file_index;
        m->sync_stream_index = m->stream_index;
    }
}

static void parse_meta_type(char *arg, char *type, int *index, char **endptr)
{
    *endptr = arg;
    if (*arg == ',') {
        *type = *(++arg);
        switch (*arg) {
        case 'g':
            break;
        case 's':
        case 'c':
        case 'p':
            *index = strtol(++arg, endptr, 0);
            break;
        default:
            fprintf(stderr, "Invalid metadata type %c.\n", *arg);
            ffmpeg_exit(1);
        }
    } else
        *type = 'g';
}

static void opt_map_meta_data(const char *arg)
{
    AVMetaDataMap *m, *m1;
    char *p;

    meta_data_maps = grow_array(meta_data_maps, sizeof(*meta_data_maps),
                                &nb_meta_data_maps, nb_meta_data_maps + 1);

    m = &meta_data_maps[nb_meta_data_maps - 1][0];
    m->file = strtol(arg, &p, 0);
    parse_meta_type(p, &m->type, &m->index, &p);
    if (*p)
        p++;

    m1 = &meta_data_maps[nb_meta_data_maps - 1][1];
    m1->file = strtol(p, &p, 0);
    parse_meta_type(p, &m1->type, &m1->index, &p);

    if (m->type == 'g' || m1->type == 'g')
        metadata_global_autocopy = 0;
    if (m->type == 's' || m1->type == 's')
        metadata_streams_autocopy = 0;
    if (m->type == 'c' || m1->type == 'c')
        metadata_chapters_autocopy = 0;
}

static void opt_map_chapters(const char *arg)
{
    AVChapterMap *c;
    char *p;

    chapter_maps = grow_array(chapter_maps, sizeof(*chapter_maps), &nb_chapter_maps,
                              nb_chapter_maps + 1);
    c = &chapter_maps[nb_chapter_maps - 1];
    c->out_file = strtol(arg, &p, 0);
    if (*p)
        p++;

    c->in_file = strtol(p, &p, 0);
}

static void opt_input_ts_scale(const char *arg)
{
    unsigned int stream;
    double scale;
    char *p;

    stream = strtol(arg, &p, 0);
    if (*p)
        p++;
    scale= strtod(p, &p);

    if(stream >= MAX_STREAMS)
        ffmpeg_exit(1);

    input_files_ts_scale[nb_input_files] = grow_array(input_files_ts_scale[nb_input_files], sizeof(*input_files_ts_scale[nb_input_files]), &nb_input_files_ts_scale[nb_input_files], stream + 1);
    input_files_ts_scale[nb_input_files][stream]= scale;
}

static int opt_recording_time(const char *opt, const char *arg)
{
    recording_time = parse_time_or_die(opt, arg, 1);
    return 0;
}

static int opt_start_time(const char *opt, const char *arg)
{
    start_time = parse_time_or_die(opt, arg, 1);
    return 0;
}

static int opt_recording_timestamp(const char *opt, const char *arg)
{
    recording_timestamp = parse_time_or_die(opt, arg, 0) / 1000000;
    return 0;
}

static int opt_input_ts_offset(const char *opt, const char *arg)
{
    input_ts_offset = parse_time_or_die(opt, arg, 1);
    return 0;
}

static enum CodecID find_codec_or_die(const char *name, int type, int encoder, int strict)
{
    const char *codec_string = encoder ? "encoder" : "decoder";
    AVCodec *codec;

    if(!name)
        return CODEC_ID_NONE;
    codec = encoder ?
        avcodec_find_encoder_by_name(name) :
        avcodec_find_decoder_by_name(name);
    if(!codec) {
        fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
        ffmpeg_exit(1);
    }
    if(codec->type != type) {
        fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
        ffmpeg_exit(1);
    }
    if(codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
       strict > FF_COMPLIANCE_EXPERIMENTAL) {
        fprintf(stderr, "%s '%s' is experimental and might produce bad "
                "results.\nAdd '-strict experimental' if you want to use it.\n",
                codec_string, codec->name);
        codec = encoder ?
            avcodec_find_encoder(codec->id) :
            avcodec_find_decoder(codec->id);
        if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
            fprintf(stderr, "Or use the non experimental %s '%s'.\n",
                    codec_string, codec->name);
        ffmpeg_exit(1);
    }
    return codec->id;
}

static void opt_input_file(const char *filename)
{
    AVFormatContext *ic;
    AVFormatParameters params, *ap = &params;
    AVInputFormat *file_iformat = NULL;
    int err, i, ret, rfps, rfps_base;
    int64_t timestamp;

    if (last_asked_format) {
        if (!(file_iformat = av_find_input_format(last_asked_format))) {
            fprintf(stderr, "Unknown input format: '%s'\n", last_asked_format);
            ffmpeg_exit(1);
        }
        last_asked_format = NULL;
    }

    if (!strcmp(filename, "-"))
        filename = "pipe:";

    using_stdin |= !strncmp(filename, "pipe:", 5) ||
                    !strcmp(filename, "/dev/stdin");

    /* get default parameters from command line */
    ic = avformat_alloc_context();
    if (!ic) {
        print_error(filename, AVERROR(ENOMEM));
        ffmpeg_exit(1);
    }

    memset(ap, 0, sizeof(*ap));
    ap->prealloced_context = 1;
    ap->sample_rate = audio_sample_rate;
    ap->channels = audio_channels;
    ap->time_base.den = frame_rate.num;
    ap->time_base.num = frame_rate.den;
    ap->width = frame_width;
    ap->height = frame_height;
    ap->pix_fmt = frame_pix_fmt;
   // ap->sample_fmt = audio_sample_fmt; //FIXME:not implemented in libavformat
    ap->channel = video_channel;
    ap->standard = video_standard;

    set_context_opts(ic, avformat_opts, AV_OPT_FLAG_DECODING_PARAM, NULL);

    ic->video_codec_id   =
        find_codec_or_die(video_codec_name   , AVMEDIA_TYPE_VIDEO   , 0,
                          avcodec_opts[AVMEDIA_TYPE_VIDEO   ]->strict_std_compliance);
    ic->audio_codec_id   =
        find_codec_or_die(audio_codec_name   , AVMEDIA_TYPE_AUDIO   , 0,
                          avcodec_opts[AVMEDIA_TYPE_AUDIO   ]->strict_std_compliance);
    ic->subtitle_codec_id=
        find_codec_or_die(subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, 0,
                          avcodec_opts[AVMEDIA_TYPE_SUBTITLE]->strict_std_compliance);
    ic->flags |= AVFMT_FLAG_NONBLOCK;

    /* open the input file with generic libav function */
    err = av_open_input_file(&ic, filename, file_iformat, 0, ap);
    if (err < 0) {
        print_error(filename, err);
        ffmpeg_exit(1);
    }
    if(opt_programid) {
        int i, j;
        int found=0;
        for(i=0; i<ic->nb_streams; i++){
            ic->streams[i]->discard= AVDISCARD_ALL;
        }
        for(i=0; i<ic->nb_programs; i++){
            AVProgram *p= ic->programs[i];
            if(p->id != opt_programid){
                p->discard = AVDISCARD_ALL;
            }else{
                found=1;
                for(j=0; j<p->nb_stream_indexes; j++){
                    ic->streams[p->stream_index[j]]->discard= AVDISCARD_DEFAULT;
                }
            }
        }
        if(!found){
            fprintf(stderr, "Specified program id not found\n");
            ffmpeg_exit(1);
        }
        opt_programid=0;
    }

    ic->loop_input = loop_input;

    /* If not enough info to get the stream parameters, we decode the
       first frames to get it. (used in mpeg case for example) */
    ret = av_find_stream_info(ic);
    if (ret < 0 && verbose >= 0) {
        fprintf(stderr, "%s: could not find codec parameters\n", filename);
        av_close_input_file(ic);
        ffmpeg_exit(1);
    }

    timestamp = start_time;
    /* add the stream start time */
    if (ic->start_time != AV_NOPTS_VALUE)
        timestamp += ic->start_time;

    /* if seeking requested, we execute it */
    if (start_time != 0) {
        ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
        if (ret < 0) {
            fprintf(stderr, "%s: could not seek to position %0.3f\n",
                    filename, (double)timestamp / AV_TIME_BASE);
        }
        /* reset seek info */
        start_time = 0;
    }

    /* update the current parameters so that they match the one of the input stream */
    for(i=0;i<ic->nb_streams;i++) {
        AVStream *st = ic->streams[i];
        AVCodecContext *dec = st->codec;
        avcodec_thread_init(dec, thread_count);
        input_codecs = grow_array(input_codecs, sizeof(*input_codecs), &nb_input_codecs, nb_input_codecs + 1);
        switch (dec->codec_type) {
        case AVMEDIA_TYPE_AUDIO:
            input_codecs[nb_input_codecs-1] = avcodec_find_decoder_by_name(audio_codec_name);
            set_context_opts(dec, avcodec_opts[AVMEDIA_TYPE_AUDIO], AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM, input_codecs[nb_input_codecs-1]);
            //fprintf(stderr, "\nInput Audio channels: %d", dec->channels);
            channel_layout    = dec->channel_layout;
            audio_channels    = dec->channels;
            audio_sample_rate = dec->sample_rate;
            audio_sample_fmt  = dec->sample_fmt;
            if(audio_disable)
                st->discard= AVDISCARD_ALL;
            /* Note that av_find_stream_info can add more streams, and we
             * currently have no chance of setting up lowres decoding
             * early enough for them. */
            if (dec->lowres)
                audio_sample_rate >>= dec->lowres;
            break;
        case AVMEDIA_TYPE_VIDEO:
            input_codecs[nb_input_codecs-1] = avcodec_find_decoder_by_name(video_codec_name);
            set_context_opts(dec, avcodec_opts[AVMEDIA_TYPE_VIDEO], AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM, input_codecs[nb_input_codecs-1]);
            frame_height = dec->height;
            frame_width  = dec->width;
            if(ic->streams[i]->sample_aspect_ratio.num)
                frame_aspect_ratio=av_q2d(ic->streams[i]->sample_aspect_ratio);
            else
                frame_aspect_ratio=av_q2d(dec->sample_aspect_ratio);
            frame_aspect_ratio *= (float) dec->width / dec->height;
            frame_pix_fmt = dec->pix_fmt;
            rfps      = ic->streams[i]->r_frame_rate.num;
            rfps_base = ic->streams[i]->r_frame_rate.den;
            if (dec->lowres) {
                dec->flags |= CODEC_FLAG_EMU_EDGE;
                frame_height >>= dec->lowres;
                frame_width  >>= dec->lowres;
                dec->height = frame_height;
                dec->width  = frame_width;
            }
            if(me_threshold)
                dec->debug |= FF_DEBUG_MV;

            if (dec->time_base.den != rfps*dec->ticks_per_frame || dec->time_base.num != rfps_base) {

                if (verbose >= 0)
                    fprintf(stderr,"\nSeems stream %d codec frame rate differs from container frame rate: %2.2f (%d/%d) -> %2.2f (%d/%d)\n",
                            i, (float)dec->time_base.den / dec->time_base.num, dec->time_base.den, dec->time_base.num,

                    (float)rfps / rfps_base, rfps, rfps_base);
            }
            /* update the current frame rate to match the stream frame rate */
            frame_rate.num = rfps;
            frame_rate.den = rfps_base;

            if(video_disable)
                st->discard= AVDISCARD_ALL;
            else if(video_discard)
                st->discard= video_discard;
            break;
        case AVMEDIA_TYPE_DATA:
            break;
        case AVMEDIA_TYPE_SUBTITLE:
            input_codecs[nb_input_codecs-1] = avcodec_find_decoder_by_name(subtitle_codec_name);
            if(subtitle_disable)
                st->discard = AVDISCARD_ALL;
            break;
        case AVMEDIA_TYPE_ATTACHMENT:
        case AVMEDIA_TYPE_UNKNOWN:
            break;
        default:
            abort();
        }
    }

    input_files[nb_input_files] = ic;
    input_files_ts_offset[nb_input_files] = input_ts_offset - (copy_ts ? 0 : timestamp);
    /* dump the file content */
    if (verbose >= 0)
        dump_format(ic, nb_input_files, filename, 0);

    nb_input_files++;

    video_channel = 0;

    av_freep(&video_codec_name);
    av_freep(&audio_codec_name);
    av_freep(&subtitle_codec_name);
}

static void check_audio_video_sub_inputs(int *has_video_ptr, int *has_audio_ptr,
                                         int *has_subtitle_ptr)
{
    int has_video, has_audio, has_subtitle, i, j;
    AVFormatContext *ic;

    has_video = 0;
    has_audio = 0;
    has_subtitle = 0;
    for(j=0;j<nb_input_files;j++) {
        ic = input_files[j];
        for(i=0;i<ic->nb_streams;i++) {
            AVCodecContext *enc = ic->streams[i]->codec;
            switch(enc->codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                has_audio = 1;
                break;
            case AVMEDIA_TYPE_VIDEO:
                has_video = 1;
                break;
            case AVMEDIA_TYPE_SUBTITLE:
                has_subtitle = 1;
                break;
            case AVMEDIA_TYPE_DATA:
            case AVMEDIA_TYPE_ATTACHMENT:
            case AVMEDIA_TYPE_UNKNOWN:
                break;
            default:
                abort();
            }
        }
    }
    *has_video_ptr = has_video;
    *has_audio_ptr = has_audio;
    *has_subtitle_ptr = has_subtitle;
}

static void new_video_stream(AVFormatContext *oc, int file_idx)
{
    AVStream *st;
    AVOutputStream *ost;
    AVCodecContext *video_enc;
    enum CodecID codec_id = CODEC_ID_NONE;
    AVCodec *codec= NULL;

    st = av_new_stream(oc, oc->nb_streams < nb_streamid_map ? streamid_map[oc->nb_streams] : 0);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        ffmpeg_exit(1);
    }
    ost = new_output_stream(oc, file_idx);

    output_codecs = grow_array(output_codecs, sizeof(*output_codecs), &nb_output_codecs, nb_output_codecs + 1);
    if(!video_stream_copy){
        if (video_codec_name) {
            codec_id = find_codec_or_die(video_codec_name, AVMEDIA_TYPE_VIDEO, 1,
                                         avcodec_opts[AVMEDIA_TYPE_VIDEO]->strict_std_compliance);
            codec = avcodec_find_encoder_by_name(video_codec_name);
            output_codecs[nb_output_codecs-1] = codec;
        } else {
            codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, AVMEDIA_TYPE_VIDEO);
            codec = avcodec_find_encoder(codec_id);
        }
    }

    avcodec_get_context_defaults3(st->codec, codec);
    ost->bitstream_filters = video_bitstream_filters;
    video_bitstream_filters= NULL;

    avcodec_thread_init(st->codec, thread_count);

    video_enc = st->codec;

    if(video_codec_tag)
        video_enc->codec_tag= video_codec_tag;

    if(   (video_global_header&1)
       || (video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))){
        video_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avcodec_opts[AVMEDIA_TYPE_VIDEO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if(video_global_header&2){
        video_enc->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
        avcodec_opts[AVMEDIA_TYPE_VIDEO]->flags2|= CODEC_FLAG2_LOCAL_HEADER;
    }

    if (video_stream_copy) {
        st->stream_copy = 1;
        video_enc->codec_type = AVMEDIA_TYPE_VIDEO;
        video_enc->sample_aspect_ratio =
        st->sample_aspect_ratio = av_d2q(frame_aspect_ratio*frame_height/frame_width, 255);
    } else {
        const char *p;
        int i;
        AVRational fps= frame_rate.num ? frame_rate : (AVRational){25,1};

        video_enc->codec_id = codec_id;
        set_context_opts(video_enc, avcodec_opts[AVMEDIA_TYPE_VIDEO], AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, codec);

        if (codec && codec->supported_framerates && !force_fps)
            fps = codec->supported_framerates[av_find_nearest_q_idx(fps, codec->supported_framerates)];
        video_enc->time_base.den = fps.num;
        video_enc->time_base.num = fps.den;

        video_enc->width = frame_width;
        video_enc->height = frame_height;
        video_enc->sample_aspect_ratio = av_d2q(frame_aspect_ratio*video_enc->height/video_enc->width, 255);
        video_enc->pix_fmt = frame_pix_fmt;
        st->sample_aspect_ratio = video_enc->sample_aspect_ratio;

        choose_pixel_fmt(st, codec);

        if (intra_only)
            video_enc->gop_size = 0;
        if (video_qscale || same_quality) {
            video_enc->flags |= CODEC_FLAG_QSCALE;
            video_enc->global_quality=
                st->quality = FF_QP2LAMBDA * video_qscale;
        }

        if(intra_matrix)
            video_enc->intra_matrix = intra_matrix;
        if(inter_matrix)
            video_enc->inter_matrix = inter_matrix;

        p= video_rc_override_string;
        for(i=0; p; i++){
            int start, end, q;
            int e=sscanf(p, "%d,%d,%d", &start, &end, &q);
            if(e!=3){
                fprintf(stderr, "error parsing rc_override\n");
                ffmpeg_exit(1);
            }
            video_enc->rc_override=
                av_realloc(video_enc->rc_override,
                           sizeof(RcOverride)*(i+1));
            video_enc->rc_override[i].start_frame= start;
            video_enc->rc_override[i].end_frame  = end;
            if(q>0){
                video_enc->rc_override[i].qscale= q;
                video_enc->rc_override[i].quality_factor= 1.0;
            }
            else{
                video_enc->rc_override[i].qscale= 0;
                video_enc->rc_override[i].quality_factor= -q/100.0;
            }
            p= strchr(p, '/');
            if(p) p++;
        }
        video_enc->rc_override_count=i;
        if (!video_enc->rc_initial_buffer_occupancy)
            video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size*3/4;
        video_enc->me_threshold= me_threshold;
        video_enc->intra_dc_precision= intra_dc_precision - 8;

        if (do_psnr)
            video_enc->flags|= CODEC_FLAG_PSNR;

        /* two pass mode */
        if (do_pass) {
            if (do_pass == 1) {
                video_enc->flags |= CODEC_FLAG_PASS1;
            } else {
                video_enc->flags |= CODEC_FLAG_PASS2;
            }
        }

        if (forced_key_frames)
            parse_forced_key_frames(forced_key_frames, ost, video_enc);
    }
    if (video_language) {
        av_metadata_set2(&st->metadata, "language", video_language, 0);
        av_freep(&video_language);
    }

    /* reset some key parameters */
    video_disable = 0;
    av_freep(&video_codec_name);
    av_freep(&forced_key_frames);
    video_stream_copy = 0;
    frame_pix_fmt = PIX_FMT_NONE;
}

static void new_audio_stream(AVFormatContext *oc, int file_idx)
{
    AVStream *st;
    AVOutputStream *ost;
    AVCodec *codec= NULL;
    AVCodecContext *audio_enc;
    enum CodecID codec_id = CODEC_ID_NONE;

    st = av_new_stream(oc, oc->nb_streams < nb_streamid_map ? streamid_map[oc->nb_streams] : 0);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        ffmpeg_exit(1);
    }
    ost = new_output_stream(oc, file_idx);

    output_codecs = grow_array(output_codecs, sizeof(*output_codecs), &nb_output_codecs, nb_output_codecs + 1);
    if(!audio_stream_copy){
        if (audio_codec_name) {
            codec_id = find_codec_or_die(audio_codec_name, AVMEDIA_TYPE_AUDIO, 1,
                                         avcodec_opts[AVMEDIA_TYPE_AUDIO]->strict_std_compliance);
            codec = avcodec_find_encoder_by_name(audio_codec_name);
            output_codecs[nb_output_codecs-1] = codec;
        } else {
            codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, AVMEDIA_TYPE_AUDIO);
            codec = avcodec_find_encoder(codec_id);
        }
    }

    avcodec_get_context_defaults3(st->codec, codec);

    ost->bitstream_filters = audio_bitstream_filters;
    audio_bitstream_filters= NULL;

    avcodec_thread_init(st->codec, thread_count);

    audio_enc = st->codec;
    audio_enc->codec_type = AVMEDIA_TYPE_AUDIO;

    if(audio_codec_tag)
        audio_enc->codec_tag= audio_codec_tag;

    if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
        audio_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avcodec_opts[AVMEDIA_TYPE_AUDIO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if (audio_stream_copy) {
        st->stream_copy = 1;
        audio_enc->channels = audio_channels;
        audio_enc->sample_rate = audio_sample_rate;
    } else {
        audio_enc->codec_id = codec_id;
        set_context_opts(audio_enc, avcodec_opts[AVMEDIA_TYPE_AUDIO], AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, codec);

        if (audio_qscale > QSCALE_NONE) {
            audio_enc->flags |= CODEC_FLAG_QSCALE;
            audio_enc->global_quality = st->quality = FF_QP2LAMBDA * audio_qscale;
        }
        audio_enc->channels = audio_channels;
        audio_enc->sample_fmt = audio_sample_fmt;
        audio_enc->sample_rate = audio_sample_rate;
        audio_enc->channel_layout = channel_layout;
        if (av_get_channel_layout_nb_channels(channel_layout) != audio_channels)
            audio_enc->channel_layout = 0;
        choose_sample_fmt(st, codec);
        choose_sample_rate(st, codec);
    }
    audio_enc->time_base= (AVRational){1, audio_sample_rate};
    if (audio_language) {
        av_metadata_set2(&st->metadata, "language", audio_language, 0);
        av_freep(&audio_language);
    }

    /* reset some key parameters */
    audio_disable = 0;
    av_freep(&audio_codec_name);
    audio_stream_copy = 0;
}

static void new_subtitle_stream(AVFormatContext *oc, int file_idx)
{
    AVStream *st;
    AVOutputStream *ost;
    AVCodec *codec=NULL;
    AVCodecContext *subtitle_enc;
    enum CodecID codec_id = CODEC_ID_NONE;

    st = av_new_stream(oc, oc->nb_streams < nb_streamid_map ? streamid_map[oc->nb_streams] : 0);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        ffmpeg_exit(1);
    }
    ost = new_output_stream(oc, file_idx);
    subtitle_enc = st->codec;
    output_codecs = grow_array(output_codecs, sizeof(*output_codecs), &nb_output_codecs, nb_output_codecs + 1);
    if(!subtitle_stream_copy){
        if (subtitle_codec_name) {
            codec_id = find_codec_or_die(subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, 1,
                                         avcodec_opts[AVMEDIA_TYPE_SUBTITLE]->strict_std_compliance);
            codec= output_codecs[nb_output_codecs-1] = avcodec_find_encoder_by_name(subtitle_codec_name);
        } else {
            codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, AVMEDIA_TYPE_SUBTITLE);
            codec = avcodec_find_encoder(codec_id);
        }
    }
    avcodec_get_context_defaults3(st->codec, codec);

    ost->bitstream_filters = subtitle_bitstream_filters;
    subtitle_bitstream_filters= NULL;

    subtitle_enc->codec_type = AVMEDIA_TYPE_SUBTITLE;

    if(subtitle_codec_tag)
        subtitle_enc->codec_tag= subtitle_codec_tag;

    if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
        subtitle_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avcodec_opts[AVMEDIA_TYPE_SUBTITLE]->flags |= CODEC_FLAG_GLOBAL_HEADER;
    }
    if (subtitle_stream_copy) {
        st->stream_copy = 1;
    } else {
        subtitle_enc->codec_id = codec_id;
        set_context_opts(avcodec_opts[AVMEDIA_TYPE_SUBTITLE], subtitle_enc, AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_ENCODING_PARAM, codec);
    }

    if (subtitle_language) {
        av_metadata_set2(&st->metadata, "language", subtitle_language, 0);
        av_freep(&subtitle_language);
    }

    subtitle_disable = 0;
    av_freep(&subtitle_codec_name);
    subtitle_stream_copy = 0;
}

static int opt_new_stream(const char *opt, const char *arg)
{
    AVFormatContext *oc;
    int file_idx = nb_output_files - 1;
    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        ffmpeg_exit(1);
    }
    oc = output_files[file_idx];

    if      (!strcmp(opt, "newvideo"   )) new_video_stream   (oc, file_idx);
    else if (!strcmp(opt, "newaudio"   )) new_audio_stream   (oc, file_idx);
    else if (!strcmp(opt, "newsubtitle")) new_subtitle_stream(oc, file_idx);
    else av_assert0(0);
    return 0;
}

/* arg format is "output-stream-index:streamid-value". */
static int opt_streamid(const char *opt, const char *arg)
{
    int idx;
    char *p;
    char idx_str[16];

    strncpy(idx_str, arg, sizeof(idx_str));
    idx_str[sizeof(idx_str)-1] = '\0';
    p = strchr(idx_str, ':');
    if (!p) {
        fprintf(stderr,
                "Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
                arg, opt);
        ffmpeg_exit(1);
    }
    *p++ = '\0';
    idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, MAX_STREAMS-1);
    streamid_map = grow_array(streamid_map, sizeof(*streamid_map), &nb_streamid_map, idx+1);
    streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
    return 0;
}

static void opt_output_file(const char *filename)
{
    AVFormatContext *oc;
    int err, use_video, use_audio, use_subtitle;
    int input_has_video, input_has_audio, input_has_subtitle;
    AVFormatParameters params, *ap = &params;
    AVOutputFormat *file_oformat;

    if (!strcmp(filename, "-"))
        filename = "pipe:";

    oc = avformat_alloc_context();
    if (!oc) {
        print_error(filename, AVERROR(ENOMEM));
        ffmpeg_exit(1);
    }

    if (last_asked_format) {
        file_oformat = av_guess_format(last_asked_format, NULL, NULL);
        if (!file_oformat) {
            fprintf(stderr, "Requested output format '%s' is not a suitable output format\n", last_asked_format);
            ffmpeg_exit(1);
        }
        last_asked_format = NULL;
    } else {
        file_oformat = av_guess_format(NULL, filename, NULL);
        if (!file_oformat) {
            fprintf(stderr, "Unable to find a suitable output format for '%s'\n",
                    filename);
            ffmpeg_exit(1);
        }
    }

    oc->oformat = file_oformat;
    av_strlcpy(oc->filename, filename, sizeof(oc->filename));

    if (!strcmp(file_oformat->name, "ffm") &&
        av_strstart(filename, "http:", NULL)) {
        /* special case for files sent to ffserver: we get the stream
           parameters from ffserver */
        int err = read_ffserver_streams(oc, filename);
        if (err < 0) {
            print_error(filename, err);
            ffmpeg_exit(1);
        }
    } else {
        use_video = file_oformat->video_codec != CODEC_ID_NONE || video_stream_copy || video_codec_name;
        use_audio = file_oformat->audio_codec != CODEC_ID_NONE || audio_stream_copy || audio_codec_name;
        use_subtitle = file_oformat->subtitle_codec != CODEC_ID_NONE || subtitle_stream_copy || subtitle_codec_name;

        /* disable if no corresponding type found and at least one
           input file */
        if (nb_input_files > 0) {
            check_audio_video_sub_inputs(&input_has_video, &input_has_audio,
                                         &input_has_subtitle);
            if (!input_has_video)
                use_video = 0;
            if (!input_has_audio)
                use_audio = 0;
            if (!input_has_subtitle)
                use_subtitle = 0;
        }

        /* manual disable */
        if (audio_disable)    use_audio    = 0;
        if (video_disable)    use_video    = 0;
        if (subtitle_disable) use_subtitle = 0;

        if (use_video)    new_video_stream(oc, nb_output_files);
        if (use_audio)    new_audio_stream(oc, nb_output_files);
        if (use_subtitle) new_subtitle_stream(oc, nb_output_files);

        oc->timestamp = recording_timestamp;

        av_metadata_copy(&oc->metadata, metadata, 0);
        av_metadata_free(&metadata);
    }

    output_files[nb_output_files++] = oc;

    /* check filename in case of an image number is expected */
    if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
        if (!av_filename_number_test(oc->filename)) {
            print_error(oc->filename, AVERROR_NUMEXPECTED);
            ffmpeg_exit(1);
        }
    }

    if (!(oc->oformat->flags & AVFMT_NOFILE)) {
        /* test if it already exists to avoid loosing precious files */
        if (!file_overwrite &&
            (strchr(filename, ':') == NULL ||
             filename[1] == ':' ||
             av_strstart(filename, "file:", NULL))) {
            if (url_exist(filename)) {
                if (!using_stdin) {
                    fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
                    fflush(stderr);
                    if (!read_yesno()) {
                        fprintf(stderr, "Not overwriting - exiting\n");
                        ffmpeg_exit(1);
                    }
                }
                else {
                    fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
                    ffmpeg_exit(1);
                }
            }
        }

        /* open the file */
        if ((err = url_fopen(&oc->pb, filename, URL_WRONLY)) < 0) {
            print_error(filename, err);
            ffmpeg_exit(1);
        }
    }

    memset(ap, 0, sizeof(*ap));
    if (av_set_parameters(oc, ap) < 0) {
        fprintf(stderr, "%s: Invalid encoding parameters\n",
                oc->filename);
        ffmpeg_exit(1);
    }

    oc->preload= (int)(mux_preload*AV_TIME_BASE);
    oc->max_delay= (int)(mux_max_delay*AV_TIME_BASE);
    oc->loop_output = loop_output;
    oc->flags |= AVFMT_FLAG_NONBLOCK;

    set_context_opts(oc, avformat_opts, AV_OPT_FLAG_ENCODING_PARAM, NULL);

    nb_streamid_map = 0;
    av_freep(&forced_key_frames);
}

/* same option as mencoder */
static void opt_pass(const char *pass_str)
{
    int pass;
    pass = atoi(pass_str);
    if (pass != 1 && pass != 2) {
        fprintf(stderr, "pass number can be only 1 or 2\n");
        ffmpeg_exit(1);
    }
    do_pass = pass;
}

static int64_t getutime(void)
{
#if HAVE_GETRUSAGE
    struct rusage rusage;

    getrusage(RUSAGE_SELF, &rusage);
    return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
#elif HAVE_GETPROCESSTIMES
    HANDLE proc;
    FILETIME c, e, k, u;
    proc = GetCurrentProcess();
    GetProcessTimes(proc, &c, &e, &k, &u);
    return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
#else
    return av_gettime();
#endif
}

static int64_t getmaxrss(void)
{
#if HAVE_GETRUSAGE && HAVE_STRUCT_RUSAGE_RU_MAXRSS
    struct rusage rusage;
    getrusage(RUSAGE_SELF, &rusage);
    return (int64_t)rusage.ru_maxrss * 1024;
#elif HAVE_GETPROCESSMEMORYINFO
    HANDLE proc;
    PROCESS_MEMORY_COUNTERS memcounters;
    proc = GetCurrentProcess();
    memcounters.cb = sizeof(memcounters);
    GetProcessMemoryInfo(proc, &memcounters, sizeof(memcounters));
    return memcounters.PeakPagefileUsage;
#else
    return 0;
#endif
}

static void parse_matrix_coeffs(uint16_t *dest, const char *str)
{
    int i;
    const char *p = str;
    for(i = 0;; i++) {
        dest[i] = atoi(p);
        if(i == 63)
            break;
        p = strchr(p, ',');
        if(!p) {
            fprintf(stderr, "Syntax error in matrix \"%s\" at coeff %d\n", str, i);
            ffmpeg_exit(1);
        }
        p++;
    }
}

static void opt_inter_matrix(const char *arg)
{
    inter_matrix = av_mallocz(sizeof(uint16_t) * 64);
    parse_matrix_coeffs(inter_matrix, arg);
}

static void opt_intra_matrix(const char *arg)
{
    intra_matrix = av_mallocz(sizeof(uint16_t) * 64);
    parse_matrix_coeffs(intra_matrix, arg);
}

static void show_usage(void)
{
    printf("Hyper fast Audio and Video encoder\n");
    printf("usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...\n");
    printf("\n");
}

static void show_help(void)
{
    AVCodec *c;
    AVOutputFormat *oformat = NULL;

    av_log_set_callback(log_callback_help);
    show_usage();
    show_help_options(options, "Main options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE | OPT_GRAB, 0);
    show_help_options(options, "\nAdvanced options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE | OPT_GRAB,
                      OPT_EXPERT);
    show_help_options(options, "\nVideo options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_VIDEO);
    show_help_options(options, "\nAdvanced Video options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_VIDEO | OPT_EXPERT);
    show_help_options(options, "\nAudio options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_AUDIO);
    show_help_options(options, "\nAdvanced Audio options:\n",
                      OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_GRAB,
                      OPT_AUDIO | OPT_EXPERT);
    show_help_options(options, "\nSubtitle options:\n",
                      OPT_SUBTITLE | OPT_GRAB,
                      OPT_SUBTITLE);
    show_help_options(options, "\nAudio/Video grab options:\n",
                      OPT_GRAB,
                      OPT_GRAB);
    printf("\n");
    av_opt_show2(avcodec_opts[0], NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
    printf("\n");

    /* individual codec options */
    c = NULL;
    while ((c = av_codec_next(c))) {
        if (c->priv_class) {
            av_opt_show2(&c->priv_class, NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
            printf("\n");
        }
    }

    av_opt_show2(avformat_opts, NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
    printf("\n");

    /* individual muxer options */
    while ((oformat = av_oformat_next(oformat))) {
        if (oformat->priv_class) {
            av_opt_show2(&oformat->priv_class, NULL, AV_OPT_FLAG_ENCODING_PARAM, 0);
            printf("\n");
        }
    }

    av_opt_show2(sws_opts, NULL, AV_OPT_FLAG_ENCODING_PARAM|AV_OPT_FLAG_DECODING_PARAM, 0);
}

static void opt_target(const char *arg)
{
    enum { PAL, NTSC, FILM, UNKNOWN } norm = UNKNOWN;
    static const char *const frame_rates[] = {"25", "30000/1001", "24000/1001"};

    if(!strncmp(arg, "pal-", 4)) {
        norm = PAL;
        arg += 4;
    } else if(!strncmp(arg, "ntsc-", 5)) {
        norm = NTSC;
        arg += 5;
    } else if(!strncmp(arg, "film-", 5)) {
        norm = FILM;
        arg += 5;
    } else {
        int fr;
        /* Calculate FR via float to avoid int overflow */
        fr = (int)(frame_rate.num * 1000.0 / frame_rate.den);
        if(fr == 25000) {
            norm = PAL;
        } else if((fr == 29970) || (fr == 23976)) {
            norm = NTSC;
        } else {
            /* Try to determine PAL/NTSC by peeking in the input files */
            if(nb_input_files) {
                int i, j;
                for(j = 0; j < nb_input_files; j++) {
                    for(i = 0; i < input_files[j]->nb_streams; i++) {
                        AVCodecContext *c = input_files[j]->streams[i]->codec;
                        if(c->codec_type != AVMEDIA_TYPE_VIDEO)
                            continue;
                        fr = c->time_base.den * 1000 / c->time_base.num;
                        if(fr == 25000) {
                            norm = PAL;
                            break;
                        } else if((fr == 29970) || (fr == 23976)) {
                            norm = NTSC;
                            break;
                        }
                    }
                    if(norm != UNKNOWN)
                        break;
                }
            }
        }
        if(verbose && norm != UNKNOWN)
            fprintf(stderr, "Assuming %s for target.\n", norm == PAL ? "PAL" : "NTSC");
    }

    if(norm == UNKNOWN) {
        fprintf(stderr, "Could not determine norm (PAL/NTSC/NTSC-Film) for target.\n");
        fprintf(stderr, "Please prefix target with \"pal-\", \"ntsc-\" or \"film-\",\n");
        fprintf(stderr, "or set a framerate with \"-r xxx\".\n");
        ffmpeg_exit(1);
    }

    if(!strcmp(arg, "vcd")) {

        opt_video_codec("mpeg1video");
        opt_audio_codec("mp2");
        opt_format("vcd");

        opt_frame_size(norm == PAL ? "352x288" : "352x240");
        opt_frame_rate(NULL, frame_rates[norm]);
        opt_default("g", norm == PAL ? "15" : "18");

        opt_default("b", "1150000");
        opt_default("maxrate", "1150000");
        opt_default("minrate", "1150000");
        opt_default("bufsize", "327680"); // 40*1024*8;

        opt_default("ab", "224000");
        audio_sample_rate = 44100;
        audio_channels = 2;

        opt_default("packetsize", "2324");
        opt_default("muxrate", "1411200"); // 2352 * 75 * 8;

        /* We have to offset the PTS, so that it is consistent with the SCR.
           SCR starts at 36000, but the first two packs contain only padding
           and the first pack from the other stream, respectively, may also have
           been written before.
           So the real data starts at SCR 36000+3*1200. */
        mux_preload= (36000+3*1200) / 90000.0; //0.44
    } else if(!strcmp(arg, "svcd")) {

        opt_video_codec("mpeg2video");
        opt_audio_codec("mp2");
        opt_format("svcd");

        opt_frame_size(norm == PAL ? "480x576" : "480x480");
        opt_frame_rate(NULL, frame_rates[norm]);
        opt_default("g", norm == PAL ? "15" : "18");

        opt_default("b", "2040000");
        opt_default("maxrate", "2516000");
        opt_default("minrate", "0"); //1145000;
        opt_default("bufsize", "1835008"); //224*1024*8;
        opt_default("flags", "+scan_offset");


        opt_default("ab", "224000");
        audio_sample_rate = 44100;

        opt_default("packetsize", "2324");

    } else if(!strcmp(arg, "dvd")) {

        opt_video_codec("mpeg2video");
        opt_audio_codec("ac3");
        opt_format("dvd");

        opt_frame_size(norm == PAL ? "720x576" : "720x480");
        opt_frame_rate(NULL, frame_rates[norm]);
        opt_default("g", norm == PAL ? "15" : "18");

        opt_default("b", "6000000");
        opt_default("maxrate", "9000000");
        opt_default("minrate", "0"); //1500000;
        opt_default("bufsize", "1835008"); //224*1024*8;

        opt_default("packetsize", "2048");  // from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
        opt_default("muxrate", "10080000"); // from mplex project: data_rate = 1260000. mux_rate = data_rate * 8

        opt_default("ab", "448000");
        audio_sample_rate = 48000;

    } else if(!strncmp(arg, "dv", 2)) {

        opt_format("dv");

        opt_frame_size(norm == PAL ? "720x576" : "720x480");
        opt_frame_pix_fmt(!strncmp(arg, "dv50", 4) ? "yuv422p" :
                          (norm == PAL ? "yuv420p" : "yuv411p"));
        opt_frame_rate(NULL, frame_rates[norm]);

        audio_sample_rate = 48000;
        audio_channels = 2;

    } else {
        fprintf(stderr, "Unknown target: %s\n", arg);
        ffmpeg_exit(1);
    }
}

static void opt_vstats_file (const char *arg)
{
    av_free (vstats_filename);
    vstats_filename=av_strdup (arg);
}

static void opt_vstats (void)
{
    char filename[40];
    time_t today2 = time(NULL);
    struct tm *today = localtime(&today2);

    snprintf(filename, sizeof(filename), "vstats_%02d%02d%02d.log", today->tm_hour, today->tm_min,
             today->tm_sec);
    opt_vstats_file(filename);
}

static int opt_bsf(const char *opt, const char *arg)
{
    AVBitStreamFilterContext *bsfc= av_bitstream_filter_init(arg); //FIXME split name and args for filter at '='
    AVBitStreamFilterContext **bsfp;

    if(!bsfc){
        fprintf(stderr, "Unknown bitstream filter %s\n", arg);
        ffmpeg_exit(1);
    }

    bsfp= *opt == 'v' ? &video_bitstream_filters :
          *opt == 'a' ? &audio_bitstream_filters :
                        &subtitle_bitstream_filters;
    while(*bsfp)
        bsfp= &(*bsfp)->next;

    *bsfp= bsfc;

    return 0;
}

static int opt_preset(const char *opt, const char *arg)
{
    FILE *f=NULL;
    char filename[1000], tmp[1000], tmp2[1000], line[1000];
    char *codec_name = *opt == 'v' ? video_codec_name :
                       *opt == 'a' ? audio_codec_name :
                                     subtitle_codec_name;

    if (!(f = get_preset_file(filename, sizeof(filename), arg, *opt == 'f', codec_name))) {
        fprintf(stderr, "File for preset '%s' not found\n", arg);
        ffmpeg_exit(1);
    }

    while(!feof(f)){
        int e= fscanf(f, "%999[^\n]\n", line) - 1;
        if(line[0] == '#' && !e)
            continue;
        e|= sscanf(line, "%999[^=]=%999[^\n]\n", tmp, tmp2) - 2;
        if(e){
            fprintf(stderr, "%s: Invalid syntax: '%s'\n", filename, line);
            ffmpeg_exit(1);
        }
        if(!strcmp(tmp, "acodec")){
            opt_audio_codec(tmp2);
        }else if(!strcmp(tmp, "vcodec")){
            opt_video_codec(tmp2);
        }else if(!strcmp(tmp, "scodec")){
            opt_subtitle_codec(tmp2);
        }else if(opt_default(tmp, tmp2) < 0){
            fprintf(stderr, "%s: Invalid option or argument: '%s', parsed as '%s' = '%s'\n", filename, line, tmp, tmp2);
            ffmpeg_exit(1);
        }
    }

    fclose(f);

    return 0;
}

static const OptionDef options[] = {
    /* main options */
#include "cmdutils_common_opts.h"
    { "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
    { "i", HAS_ARG, {(void*)opt_input_file}, "input file name", "filename" },
    { "y", OPT_BOOL, {(void*)&file_overwrite}, "overwrite output files" },
    { "map", HAS_ARG | OPT_EXPERT, {(void*)opt_map}, "set input stream mapping", "file:stream[:syncfile:syncstream]" },
    { "map_meta_data", HAS_ARG | OPT_EXPERT, {(void*)opt_map_meta_data}, "set meta data information of outfile from infile", "outfile[,metadata]:infile[,metadata]" },
    { "map_chapters",  HAS_ARG | OPT_EXPERT, {(void*)opt_map_chapters},  "set chapters mapping", "outfile:infile" },
    { "t", OPT_FUNC2 | HAS_ARG, {(void*)opt_recording_time}, "record or transcode \"duration\" seconds of audio/video", "duration" },
    { "fs", HAS_ARG | OPT_INT64, {(void*)&limit_filesize}, "set the limit file size in bytes", "limit_size" }, //
    { "ss", OPT_FUNC2 | HAS_ARG, {(void*)opt_start_time}, "set the start time offset", "time_off" },
    { "itsoffset", OPT_FUNC2 | HAS_ARG, {(void*)opt_input_ts_offset}, "set the input ts offset", "time_off" },
    { "itsscale", HAS_ARG, {(void*)opt_input_ts_scale}, "set the input ts scale", "stream:scale" },
    { "timestamp", OPT_FUNC2 | HAS_ARG, {(void*)opt_recording_timestamp}, "set the recording timestamp ('now' to set the current time)", "time" },
    { "metadata", OPT_FUNC2 | HAS_ARG, {(void*)opt_metadata}, "add metadata", "string=string" },
    { "dframes", OPT_INT | HAS_ARG, {(void*)&max_frames[AVMEDIA_TYPE_DATA]}, "set the number of data frames to record", "number" },
    { "benchmark", OPT_BOOL | OPT_EXPERT, {(void*)&do_benchmark},
      "add timings for benchmarking" },
    { "timelimit", OPT_FUNC2 | HAS_ARG, {(void*)opt_timelimit}, "set max runtime in seconds", "limit" },
    { "dump", OPT_BOOL | OPT_EXPERT, {(void*)&do_pkt_dump},
      "dump each input packet" },
    { "hex", OPT_BOOL | OPT_EXPERT, {(void*)&do_hex_dump},
      "when dumping packets, also dump the payload" },
    { "re", OPT_BOOL | OPT_EXPERT, {(void*)&rate_emu}, "read input at native frame rate", "" },
    { "loop_input", OPT_BOOL | OPT_EXPERT, {(void*)&loop_input}, "loop (current only works with images)" },
    { "loop_output", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&loop_output}, "number of times to loop output in formats that support looping (0 loops forever)", "" },
    { "v", HAS_ARG | OPT_FUNC2, {(void*)opt_verbose}, "set ffmpeg verbosity level", "number" },
    { "target", HAS_ARG, {(void*)opt_target}, "specify target file type (\"vcd\", \"svcd\", \"dvd\", \"dv\", \"dv50\", \"pal-vcd\", \"ntsc-svcd\", ...)", "type" },
    { "threads", OPT_FUNC2 | HAS_ARG | OPT_EXPERT, {(void*)opt_thread_count}, "thread count", "count" },
    { "vsync", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&video_sync_method}, "video sync method", "" },
    { "async", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&audio_sync_method}, "audio sync method", "" },
    { "adrift_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT, {(void*)&audio_drift_threshold}, "audio drift threshold", "threshold" },
    { "vglobal", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&video_global_header}, "video global header storage type", "" },
    { "copyts", OPT_BOOL | OPT_EXPERT, {(void*)&copy_ts}, "copy timestamps" },
    { "copytb", OPT_BOOL | OPT_EXPERT, {(void*)&copy_tb}, "copy input stream time base when stream copying" },
    { "shortest", OPT_BOOL | OPT_EXPERT, {(void*)&opt_shortest}, "finish encoding within shortest input" }, //
    { "dts_delta_threshold", HAS_ARG | OPT_FLOAT | OPT_EXPERT, {(void*)&dts_delta_threshold}, "timestamp discontinuity delta threshold", "threshold" },
    { "programid", HAS_ARG | OPT_INT | OPT_EXPERT, {(void*)&opt_programid}, "desired program number", "" },
    { "xerror", OPT_BOOL, {(void*)&exit_on_error}, "exit on error", "error" },
    { "copyinkf", OPT_BOOL | OPT_EXPERT, {(void*)&copy_initial_nonkeyframes}, "copy initial non-keyframes" },

    /* video options */
    { "b", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_bitrate}, "set bitrate (in bits/s)", "bitrate" },
    { "vb", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_bitrate}, "set bitrate (in bits/s)", "bitrate" },
    { "vframes", OPT_INT | HAS_ARG | OPT_VIDEO, {(void*)&max_frames[AVMEDIA_TYPE_VIDEO]}, "set the number of video frames to record", "number" },
    { "r", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_frame_rate}, "set frame rate (Hz value, fraction or abbreviation)", "rate" },
    { "s", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
    { "aspect", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_aspect_ratio}, "set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)", "aspect" },
    { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_frame_pix_fmt}, "set pixel format, 'list' as argument shows all the pixel formats supported", "format" },
    { "croptop", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "cropbottom", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "cropleft", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "cropright", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_frame_crop}, "Removed, use the crop filter instead", "size" },
    { "padtop", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padbottom", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padleft", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padright", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "size" },
    { "padcolor", OPT_FUNC2 | HAS_ARG | OPT_VIDEO, {(void*)opt_pad}, "Removed, use the pad filter instead", "color" },
    { "intra", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&intra_only}, "use only intra frames"},
    { "vn", OPT_BOOL | OPT_VIDEO, {(void*)&video_disable}, "disable video" },
    { "vdt", OPT_INT | HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)&video_discard}, "discard threshold", "n" },
    { "qscale", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_qscale}, "use fixed video quantizer scale (VBR)", "q" },
    { "rc_override", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_video_rc_override_string}, "rate control override for specific intervals", "override" },
    { "vcodec", HAS_ARG | OPT_VIDEO, {(void*)opt_video_codec}, "force video codec ('copy' to copy stream)", "codec" },
    { "me_threshold", HAS_ARG | OPT_FUNC2 | OPT_EXPERT | OPT_VIDEO, {(void*)opt_me_threshold}, "motion estimaton threshold",  "threshold" },
    { "sameq", OPT_BOOL | OPT_VIDEO, {(void*)&same_quality},
      "use same video quality as source (implies VBR)" },
    { "pass", HAS_ARG | OPT_VIDEO, {(void*)&opt_pass}, "select the pass number (1 or 2)", "n" },
    { "passlogfile", HAS_ARG | OPT_STRING | OPT_VIDEO, {(void*)&pass_logfilename_prefix}, "select two pass log file name prefix", "prefix" },
    { "deinterlace", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&do_deinterlace},
      "deinterlace pictures" },
    { "psnr", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&do_psnr}, "calculate PSNR of compressed frames" },
    { "vstats", OPT_EXPERT | OPT_VIDEO, {(void*)&opt_vstats}, "dump video coding statistics to file" },
    { "vstats_file", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_vstats_file}, "dump video coding statistics to file", "file" },
#if CONFIG_AVFILTER
    { "vf", OPT_STRING | HAS_ARG, {(void*)&vfilters}, "video filters", "filter list" },
#endif
    { "intra_matrix", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_intra_matrix}, "specify intra matrix coeffs", "matrix" },
    { "inter_matrix", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_inter_matrix}, "specify inter matrix coeffs", "matrix" },
    { "top", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_top_field_first}, "top=1/bottom=0/auto=-1 field first", "" },
    { "dc", OPT_INT | HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)&intra_dc_precision}, "intra_dc_precision", "precision" },
    { "vtag", OPT_FUNC2 | HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_codec_tag}, "force video tag/fourcc", "fourcc/tag" },
    { "newvideo", OPT_VIDEO | OPT_FUNC2, {(void*)opt_new_stream}, "add a new video stream to the current output stream" },
    { "vlang", HAS_ARG | OPT_STRING | OPT_VIDEO, {(void *)&video_language}, "set the ISO 639 language code (3 letters) of the current video stream" , "code" },
    { "qphist", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, { (void *)&qp_hist }, "show QP histogram" },
    { "force_fps", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&force_fps}, "force the selected framerate, disable the best supported framerate selection" },
    { "streamid", OPT_FUNC2 | HAS_ARG | OPT_EXPERT, {(void*)opt_streamid}, "set the value of an outfile streamid", "streamIndex:value" },
    { "force_key_frames", OPT_STRING | HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void *)&forced_key_frames}, "force key frames at specified timestamps", "timestamps" },

    /* audio options */
    { "ab", OPT_FUNC2 | HAS_ARG | OPT_AUDIO, {(void*)opt_bitrate}, "set bitrate (in bits/s)", "bitrate" },
    { "aframes", OPT_INT | HAS_ARG | OPT_AUDIO, {(void*)&max_frames[AVMEDIA_TYPE_AUDIO]}, "set the number of audio frames to record", "number" },
    { "aq", OPT_FLOAT | HAS_ARG | OPT_AUDIO, {(void*)&audio_qscale}, "set audio quality (codec-specific)", "quality", },
    { "ar", HAS_ARG | OPT_FUNC2 | OPT_AUDIO, {(void*)opt_audio_rate}, "set audio sampling rate (in Hz)", "rate" },
    { "ac", HAS_ARG | OPT_FUNC2 | OPT_AUDIO, {(void*)opt_audio_channels}, "set number of audio channels", "channels" },
    { "an", OPT_BOOL | OPT_AUDIO, {(void*)&audio_disable}, "disable audio" },
    { "acodec", HAS_ARG | OPT_AUDIO, {(void*)opt_audio_codec}, "force audio codec ('copy' to copy stream)", "codec" },
    { "atag", OPT_FUNC2 | HAS_ARG | OPT_EXPERT | OPT_AUDIO, {(void*)opt_codec_tag}, "force audio tag/fourcc", "fourcc/tag" },
    { "vol", OPT_INT | HAS_ARG | OPT_AUDIO, {(void*)&audio_volume}, "change audio volume (256=normal)" , "volume" }, //
    { "newaudio", OPT_AUDIO | OPT_FUNC2, {(void*)opt_new_stream}, "add a new audio stream to the current output stream" },
    { "alang", HAS_ARG | OPT_STRING | OPT_AUDIO, {(void *)&audio_language}, "set the ISO 639 language code (3 letters) of the current audio stream" , "code" },
    { "sample_fmt", HAS_ARG | OPT_EXPERT | OPT_AUDIO, {(void*)opt_audio_sample_fmt}, "set sample format, 'list' as argument shows all the sample formats supported", "format" },

    /* subtitle options */
    { "sn", OPT_BOOL | OPT_SUBTITLE, {(void*)&subtitle_disable}, "disable subtitle" },
    { "scodec", HAS_ARG | OPT_SUBTITLE, {(void*)opt_subtitle_codec}, "force subtitle codec ('copy' to copy stream)", "codec" },
    { "newsubtitle", OPT_SUBTITLE | OPT_FUNC2, {(void*)opt_new_stream}, "add a new subtitle stream to the current output stream" },
    { "slang", HAS_ARG | OPT_STRING | OPT_SUBTITLE, {(void *)&subtitle_language}, "set the ISO 639 language code (3 letters) of the current subtitle stream" , "code" },
    { "stag", OPT_FUNC2 | HAS_ARG | OPT_EXPERT | OPT_SUBTITLE, {(void*)opt_codec_tag}, "force subtitle tag/fourcc", "fourcc/tag" },

    /* grab options */
    { "vc", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_GRAB, {(void*)opt_video_channel}, "set video grab channel (DV1394 only)", "channel" },
    { "tvstd", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_GRAB, {(void*)opt_video_standard}, "set television standard (NTSC, PAL (SECAM))", "standard" },
    { "isync", OPT_BOOL | OPT_EXPERT | OPT_GRAB, {(void*)&input_sync}, "sync read on input", "" },

    /* muxer options */
    { "muxdelay", OPT_FLOAT | HAS_ARG | OPT_EXPERT, {(void*)&mux_max_delay}, "set the maximum demux-decode delay", "seconds" },
    { "muxpreload", OPT_FLOAT | HAS_ARG | OPT_EXPERT, {(void*)&mux_preload}, "set the initial demux-decode delay", "seconds" },

    { "absf", OPT_FUNC2 | HAS_ARG | OPT_AUDIO | OPT_EXPERT, {(void*)opt_bsf}, "", "bitstream_filter" },
    { "vbsf", OPT_FUNC2 | HAS_ARG | OPT_VIDEO | OPT_EXPERT, {(void*)opt_bsf}, "", "bitstream_filter" },
    { "sbsf", OPT_FUNC2 | HAS_ARG | OPT_SUBTITLE | OPT_EXPERT, {(void*)opt_bsf}, "", "bitstream_filter" },

    { "apre", OPT_FUNC2 | HAS_ARG | OPT_AUDIO | OPT_EXPERT, {(void*)opt_preset}, "set the audio options to the indicated preset", "preset" },
    { "vpre", OPT_FUNC2 | HAS_ARG | OPT_VIDEO | OPT_EXPERT, {(void*)opt_preset}, "set the video options to the indicated preset", "preset" },
    { "spre", OPT_FUNC2 | HAS_ARG | OPT_SUBTITLE | OPT_EXPERT, {(void*)opt_preset}, "set the subtitle options to the indicated preset", "preset" },
    { "fpre", OPT_FUNC2 | HAS_ARG | OPT_EXPERT, {(void*)opt_preset}, "set options from indicated preset file", "filename" },

    { "default", OPT_FUNC2 | HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" },
    { NULL, },
};

int main(int argc, char **argv)
{
    int64_t ti;

    av_log_set_flags(AV_LOG_SKIP_REPEATED);

    avcodec_register_all();
#if CONFIG_AVDEVICE
    avdevice_register_all();
#endif
#if CONFIG_AVFILTER
    avfilter_register_all();
#endif
    av_register_all();

#if HAVE_ISATTY
    if(isatty(STDIN_FILENO))
        url_set_interrupt_cb(decode_interrupt_cb);
#endif

    init_opts();

    show_banner();

    /* parse options */
    parse_options(argc, argv, options, opt_output_file);

    if(nb_output_files <= 0 && nb_input_files == 0) {
        show_usage();
        fprintf(stderr, "Use -h to get full help or, even better, run 'man ffmpeg'\n");
        ffmpeg_exit(1);
    }

    /* file converter / grab */
    if (nb_output_files <= 0) {
        fprintf(stderr, "At least one output file must be specified\n");
        ffmpeg_exit(1);
    }

    if (nb_input_files == 0) {
        fprintf(stderr, "At least one input file must be specified\n");
        ffmpeg_exit(1);
    }

    ti = getutime();
    if (transcode(output_files, nb_output_files, input_files, nb_input_files,
                  stream_maps, nb_stream_maps) < 0)
        ffmpeg_exit(1);
    ti = getutime() - ti;
    if (do_benchmark) {
        int maxrss = getmaxrss() / 1024;
        printf("bench: utime=%0.3fs maxrss=%ikB\n", ti / 1000000.0, maxrss);
    }

    return ffmpeg_exit(0);
}