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scalenorm

scalenorm 191 B
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1234 
  1. sws_flags=+accurate_rnd+bitexact;
    2. 

  2. testsrc=s=128x96  : d=1:r=5, format=yuv420p [a];
    3. 

  3. testsrc=s=160x120 : d=1:r=5                 [b];
    4. 

  4. [a][b] concat=unsafe=1, scale=flags=+accurate_rnd+bitexact
    5.