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• MAINTAINERS : Add Haihao Xiang for vaapi

  14 décembre 2021, par U. Artie Eoff

  MAINTAINERS : Add Haihao Xiang for vaapi
  Current listed maintainers for vaapi plugin are
  
  not reponsive and/or currently active in the
  
  ffmpeg community.  Thus, vaapi plugin patches
  
  (and qsv plugin) have generally gone ignored or
  
  lost in the ether for too long.
  Remove Gwenole Beauchesne from vaapi maintainer
  
  who has not been active since 2016.
  Current alternative maintainer for vaapi is Mark
  
  Thompson whom has not been active since
  
  March/April 2021.
  Therefore, add Haihao Xiang to vaapi maintainer
  
  who's primary role is FFmpeg development with a
  
  focus on the vaapi and qsv plugins.  Haihao has
  
  over a decade of media experience and many years
  
  of FFmpeg development experience, amongst other
  
  media frameworks.
  The additional patch for adding Haihao as qsv
  
  plugin maintainer has been submitted previously :
  https://patchwork.ffmpeg.org/project/ffmpeg/patch/20210608141134.27448-1-zhongli_dev@126.com/
  This will help FFmpeg to continue to be the leading
  
  multimedia framework by allowing these plugins to be
  
  actively improved, enhanced, and maintained for existing
  
  and future HW platforms.
  Signed-off-by : U. Artie Eoff <ullysses.a.eoff@intel.com>
  

  • [DH] MAINTAINERS

• libavformat split audio file into segments

  10 juillet 2021, par Julian F. Weinert

  I'm trying to implement a feature of ffmpeg within my own project. It consists of chopping up an audio file into small segments using a cut list.

  


  It works pretty well in the command line :

  


  ffmpeg -i input.wav -f segment -ss 1368.26458 -segment_times 1569.83750,1764.75938,1970.09375,2152.77604 -to 2362.36354 -map 0 -c:a copy %03d_output.wav


  


  During my research I came across libavformat/segment.c which looks pretty much exactly like what I need. The problem is that I'm absolutely unable to find an exposed interface or some reference to that in the documentation.

  


  How would I go about doing this using the libav* libraries ?

  


• How to use ffmpeg to find commercial breaks and synchronize faster a subtitle ? [closed]

  2 juin 2021, par zick

  I found this command that help me to find faster the commercial breaks and syncronize faster a subtitle.
But I'm encountering some problems with this command and the first is that the result in the output.txt is in full and I want to be only what was detected (black_duration).

  


  ffmpeg -i "video.mp4" -vf "blackdetect=d=3:pix_th=0" -an -f null - 2>&1 | findstr black_duration > output.txt


  


  The second problem is that I want to be directly the exact timestamps with H:M:S , not in seconds.
For exemple : [blackdetect @ 0000006a59125100] black_start:276.125 black_end:279.125 black_duration:3 , to be [blackdetect @ 0000006a59125100] black_start:00:04:35.000 black_end:00:04:38.000 black_duration:3

  


  The third and last problem is I don't know how to make a batch from that command so I can use it for more than one file.

  


  Exemple of the output.txt

  


  frame=  184 fps=0.0 q=-0.0 size=N/A time=00:00:07.66 bitrate=N/A speed=15.3x    
frame=  388 fps=388 q=-0.0 size=N/A time=00:00:16.16 bitrate=N/A speed=16.1x    
frame=  581 fps=387 q=-0.0 size=N/A time=00:00:24.20 bitrate=N/A speed=16.1x    
frame=  788 fps=394 q=-0.0 size=N/A time=00:00:32.83 bitrate=N/A speed=16.4x    
frame=  988 fps=395 q=-0.0 size=N/A time=00:00:41.16 bitrate=N/A speed=16.4x    
frame= 1193 fps=397 q=-0.0 size=N/A time=00:00:49.70 bitrate=N/A speed=16.5x    
frame= 1382 fps=394 q=-0.0 size=N/A time=00:00:57.58 bitrate=N/A speed=16.4x    
frame= 1582 fps=395 q=-0.0 size=N/A time=00:01:05.91 bitrate=N/A speed=16.4x    
frame= 1776 fps=394 q=-0.0 size=N/A time=00:01:14.00 bitrate=N/A speed=16.4x    
frame= 1970 fps=393 q=-0.0 size=N/A time=00:01:22.08 bitrate=N/A speed=16.4x    
frame= 2174 fps=395 q=-0.0 size=N/A time=00:01:30.58 bitrate=N/A speed=16.4x    
frame= 2373 fps=395 q=-0.0 size=N/A time=00:01:38.87 bitrate=N/A speed=16.4x    
frame= 2562 fps=393 q=-0.0 size=N/A time=00:01:46.75 bitrate=N/A speed=16.4x    
frame= 2748 fps=392 q=-0.0 size=N/A time=00:01:54.50 bitrate=N/A speed=16.3x    
frame= 2943 fps=392 q=-0.0 size=N/A time=00:02:02.62 bitrate=N/A speed=16.3x    
frame= 3128 fps=390 q=-0.0 size=N/A time=00:02:10.33 bitrate=N/A speed=16.3x    
frame= 3310 fps=389 q=-0.0 size=N/A time=00:02:17.91 bitrate=N/A speed=16.2x    
frame= 3501 fps=388 q=-0.0 size=N/A time=00:02:25.87 bitrate=N/A speed=16.2x    
frame= 3681 fps=387 q=-0.0 size=N/A time=00:02:33.37 bitrate=N/A speed=16.1x    
frame= 3869 fps=386 q=-0.0 size=N/A time=00:02:41.20 bitrate=N/A speed=16.1x    
frame= 4074 fps=387 q=-0.0 size=N/A time=00:02:49.75 bitrate=N/A speed=16.1x    
frame= 4256 fps=386 q=-0.0 size=N/A time=00:02:57.33 bitrate=N/A speed=16.1x    
frame= 4443 fps=385 q=-0.0 size=N/A time=00:03:05.12 bitrate=N/A speed=16.1x    
frame= 4634 fps=385 q=-0.0 size=N/A time=00:03:13.08 bitrate=N/A speed=  16x    
frame= 4817 fps=384 q=-0.0 size=N/A time=00:03:20.70 bitrate=N/A speed=  16x    
frame= 5002 fps=384 q=-0.0 size=N/A time=00:03:28.41 bitrate=N/A speed=  16x    
frame= 5199 fps=384 q=-0.0 size=N/A time=00:03:36.62 bitrate=N/A speed=  16x    
frame= 5371 fps=383 q=-0.0 size=N/A time=00:03:43.79 bitrate=N/A speed=15.9x    
frame= 5555 fps=382 q=-0.0 size=N/A time=00:03:51.45 bitrate=N/A speed=15.9x    
frame= 5737 fps=381 q=-0.0 size=N/A time=00:03:59.04 bitrate=N/A speed=15.9x    
frame= 5924 fps=381 q=-0.0 size=N/A time=00:04:06.83 bitrate=N/A speed=15.9x    
frame= 6115 fps=381 q=-0.0 size=N/A time=00:04:14.79 bitrate=N/A speed=15.9x    
frame= 6322 fps=382 q=-0.0 size=N/A time=00:04:23.41 bitrate=N/A speed=15.9x    
frame= 6525 fps=383 q=-0.0 size=N/A time=00:04:31.87 bitrate=N/A speed=15.9x    
[blackdetect @ 0000006a59125100] black_start:276.125 black_end:279.125 black_duration:3
frame= 6727 fps=383 q=-0.0 size=N/A time=00:04:40.29 bitrate=N/A speed=  16x


  


  Thanks !