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• Error in FFMPEG/LIBAV audio_decode example for aac decoding

  23 mai 2017, par Prashant Ravi

  I am trying to do aac decoding using the examples provided by FFMPEG/LIBAV. I modified the example as follows :-

  int main(int argc, char **argv)
  
  {
  
      .......
  
      /* find the MPEG audio decoder */
  
      codec = avcodec_find_decoder(AV_CODEC_ID_AAC);
  
      if (!codec) {
  
          fprintf(stderr, "codec not found\n");
  
          exit(1);
  
      }
  
      .......
  
      return 0;
  
  }

  I changed the decoder type to "AV_CODEC_ID_AAC" and recompiled the examples.

  Once I ran the example for decode audio with an example aac audio file but I am getting the following

  prashantravi@mini:/media/sf_Shared/libav/doc/examples$ ./decode_audio ../../../example.aac ../../../out.wav
  
  Error submitting the packet to the decoder
  
  err code :-1052488119

  I tried looking up the error code but it dosent match with any of the existing error codes at all.

• Playing large AVI files online with subtitles

  3 mai 2012, par Tareq

  I need a way to play a relatively large avi files (1+ GB) on the web with their subtitles, I have searched a lot for this, the only thing that I came up with was a normal embed without controls and it requires specific browser or application to show controls or even play.

  I have a large number of files (12 TB) so converting these files to mp4 would take ages not to mention having to miss with quality of audio or video.

  Is there a way that allows me to play these online along with their subtitls or should I convert these to MP4 ? I have tried to convert a file to MP4 and it didn't play either apparently it hits the browser limits or something (I tried playing it using flowplayer).

  I was considering a solution like red5, but as I found out it doesn't support avi either.

  I used this command to convert the mp4

  ffmpeg -y -i $file.avi -vcodec copy -acodec copy -copyts -f mp4 $file.mp4

  It toke relatively long time to get converted, if you have a better command or a solution that will work for playing the avis without converting, Please be my guest.

• PHP ffmpeg not found

  17 décembre 2020, par heisenberg

  so I already browse all the forum but I still get error "sh : 1 : /usr/bin/ffmpeg : not found".
If I run ffmpeg from terminal it works just fine and can do convert video without problem, but if I use PHP exec or shell_exec, the return always ffmpeg not found.

  


  this is my code :

  


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

$run = exec($cmd." -i 'linkvideo.m3u8' -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 50 /test_stream/newfile.mp4 2>&1");

var_dump($run);


  


  if I run which ffmpeg or whereis ffmpeg from terminal it will return /usr/bin/ffmpeg, but if I exec('which ffmpeg') from my code it will return ffmpeg not found. I already chown and chmod the ffmpeg to grant rwx, i tried move ffmpeg to /usr/local/bin still same result. If i run whoami from terminal it will show root but if from my code using exec('whoami') it will show www-data so maybe I miss something about the user but I also already tried to chown ffmpeg from root to www-data still the result is ffmpeg not found, maybe anyone can help, I'm using codeigniter and already install ffmpeg in server using sudo apt-get ffmpeg, thanks before !