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• avfilter/vf_extractplanes : switch to activate()

  7 mars 2022, par Paul B Mahol

  avfilter/vf_extractplanes : switch to activate()
  Fixes hang at end of input with this command :
  ffmpeg -f lavfi -i testsrc2=d=50,format=yuv444p -lavfi \
  
  "extractplanes=y+u+v[y][u][v] ;[y]tpad=start=0[y] ;[u]tpad=start=0[u] ;[v]negate[v] ;[y][u][v]vstack=3" -f null -
  

  • [DH] libavfilter/vf_extractplanes.c

• FFmpeg "Could not open file" error message when processing with PHP

  22 juin 2022, par FlyingCat

  I am using ffmpeg to get the image from several video files. I got my ffmpeg codes ready but I got the following error when I exec my codes.

  



  ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
built on Apr  2 2013 17:02:36 with gcc 4.6.3

*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
//files info...
//files info...
Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p'
//file info...
[buffer @ 0x1513c40] Buffering several frames is not supported. Please consume all available frames before adding a new one.
 Last message repeated 75 times
[image2 @ 0x1513460] Could not open file : /test/project
av_interleaved_write_frame(): Input/output error


  



  I only show the error messages that have color highlighted. 
My code :

  



   $ffmpeg ="/usr/bin/ffmpeg";

 $image_source_path = '/test/project/test.mp4';
 $ALL_PLACE_WIDTH = 300;
 $ALL_PLACE_HEIGHT = 300;

 $image_cmd = " -r 1 -ss 00:00:10 -t 00:00:01 -s ".$ALL_PLACE_WIDTH."x".$ALL_PLACE_HEIGHT."   -f image2 " ;

 $dest_image_path = '/test/project';

 $str_command= $ffmpeg  ." -i " . $image_source_path . $image_cmd .$dest_image_path;
 shell_exec($str_command);


  



  It seems my Linux wants to me to switch to avconv. I am not sure how to fix these errors. Can someone give me a hint about it ?

  


• Combining Video and Audio of different length in bulk

  25 mai 2017, par user2981223

  I am going through a tv series right now and editing the files to be to my liking. I have one set which has the video I want and one set that has the audio. I have a batch file that I can run that takes the video from every file in folder "A" and the audio from every file in folder "B" and outputs it to a folder named "output." But with this particular series, that is only half of what I need done.

  At the end of every episode of the files in the "B" folder there are some extra things. What I would like to do is take the audio and video from "A" and the audio from "B", combine it all into one file and also take the "A" and "B" files, compare the time stamps, and add the extra video from "B" to the output file.

  Let me put it another way. Let’s say "A" is 1080p with Japanese audio and is 20 minutes long. Let’s say "B" is 720p with English audio and is 23 minutes long. I want the whole 1080p video with both audio tracks, plus the 720p video spliced onto the end. Both files start at the same spot so syncing isn’t an issue. The issue is that the difference in time is different for every episode. So some episodes are 3 minutes longer, some only 30 seconds. Is there a way to make ffmpeg or another tool look at the difference in times and just add the excess to the output file ?

  Sorry for being long winded. Thanks for any help and guidance.