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• avcodec/mediacodecdec : warn when input buffers are not configured with proper size

  5 septembre 2019, par Aman Gupta

  avcodec/mediacodecdec : warn when input buffers are not configured with proper size
  In rare circumstances, if the codec is not configured with the
  
  proper parameters the input buffers can be allocated with a size
  
  that's too small to hold an individual packet. Since MediaCodec
  
  expects exactly one incoming buffer with a given PTS, it is not
  
  valid to split data for a given PTS across two input buffers.
  See https://developer.android.com/reference/android/media/MediaCodec#data-processing:
    > Do not submit multiple input buffers with the same timestamp
  Signed-off-by : Aman Gupta <aman@tmm1.net>
  

  • [DH] libavcodec/mediacodecdec.c

• FFMPEG overlay:enable removing video from screen ?

  28 août, par Harold Obasi

  i am working on a filter that shows each video on a screen based on which video's turn it is

  


  in this case the screen is 1080x1920 (for tik tok, short form content etc) with a black background, and this is the filter i have so far

  


  turns (time ranges each video should be present on screen)
v0 : (0 - 5), (10 - 15)
v1 : (5 - 10)

  


  ffmpeg -i video1.mp4 -i video2.mp4 -i audio.mp3 -filter_complex "
[0:v]scale=1080:-1[v0];
[1:v]scale=1080:-1[v1];

color=size=1080x1920:color=black[bg];

[v0][v1]overlay=x=0:y=100:enable='between(t,5,10)'[base];
[bg][base]overlay=x=0:y=0[outv]
" -map "[outv]" -map 2:a -c:v libx264 -c:a aac -preset fast -shortest out.mp4


  


  with this i get the turn based switching I am looking for

  


  the issue with this is that in some cases i'd like to be able to move the positions of the individual videos

  


  for example in the above filter i set y=100 for v1, but i whenever its' not v1's turn it's inactive

  


  I'd like for it to simply go behind v0, because i need all the videos to be visible, except they have the exact positions

  


  from the docs, i understand that this is because enable, will prevent my video from showing when its condition isn't met

  


  please, how can i solve this issue this, is there a filter for this exact case

  


• huffyuvdec : implement trick

  3 juin 2014, par Christophe Gisquet

  huffyuvdec : implement trick
  When the joint table does not contain a valid entry, the decoding restarts
  
  from scratch. By implementing the trick of jumping to the 2nd level of the
  
  individual table (and inlining the whole), a speed improvement of 5-10%
  
  is possible.
  On a 1000-frames YUV4:2:0 video, before :
  
  362851 decicycles in 422, 262094 runs, 50 skips
  
  182488 decicycles in gray, 262087 runs, 57 skips
  
  Object size : 23584
  
  Overall time : 8.377
  After :
  
  346800 decicycles in 422, 262079 runs, 65 skips
  
  168197 decicycles in gray, 262077 runs, 67 skips
  
  Object size : 23188
  
  Overall time : 7.878
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/huffyuvdec.c