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• PHP ffmpeg exec returns null

  19 mars 2012, par benedict_w

  I'm trying to run ffmpeg through a PHP exec call, I've been debugging for a while and looked at lot of responses on here, but still not found any answers...

  My simplified call is :

  $cmd = 'ffmpeg 2>&1';
  
  
  
  exec(escapeshellcmd($cmd), $stdout, $stderr);
  
  
  
  var_dump($stderr);
  
  var_dump($stdout);
  
  var_dump($cmd);
  
  exit;

  My output is $stderr = int(1) and $stdout = array(0)

  Also I tried shell_exec($cmd) which returns NULL.

  cmd.exe has permissions set for the IUSR account - e.g. I can run $cmd = 'dir' and see a directory listing output.

  PHP is not running in safe mode.

  The ffmpeg.exe is in the same directory as my php file, but I have the same response giving an absolute path to the ffmpeg.exe file in $cmd.

  ffmpeg is executing fine from the command line.

  I'm running Windows XP, IIS and PHP 5.3.

  EDIT :

  If I run 'ffmpeg -h' I get the help commands, which must indicated that ffmpeg is recognised

  I've increased the PHP memory limit to 1024 - no luck.

• mpegts muxer : Change the default subtitle language to "und"

  24 janvier 2014, par Serhii Marchuk

  mpegts muxer : Change the default subtitle language to "und"
  Reviewed-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/mpegtsenc.c

• FFmpeg - How do I set audio language and subtitles when converting videos ?

  7 mai 2022, par mereMolf

  I have a handful of mkv video files that happen to have English and Japanese audio tracks along with english subtitles. I want to convert them all to webm files and keep only the Japanese audio with English subtitles.

  


  How do I do that ?

  


  Specifically, I use QWinFF, a GUI frontend to FFmpeg.
Under the Advanced options, I use the following parameters

  


  -f webm -vcodec libvpx -g 120 -level 216 -profile:v 0 -qmax 25 -qmin 10 -rc_buf_aggressivity 0.95 -vb 480k -acodec libvorbis -aq 90


  


  Any help would be appreciated.
Thanks.