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• Heroku. Flask. App works correct on local machine but works incorrect on Heroku

  19 June 2016, by andrey durov

  I use ffmpeg buildpack.
  heroku run "ffprobe http://91.192.180.66:1935/tv-channels/stream02/playlist.m3u8" works correct.

  My code:

  <?php 
  
  // require('../vendor/autoload.php');
  
  function run($url){
  
      $testArr=[];
  
      exec("timeout 20s ffprobe $url".' 2>&1',$output);
  
      foreach ($output as $i) {
  
          if (strpos($i, 'kb/s') !== false) {
  
      array_push($testArr,$i);
  
  }
  
  print_r("test<br />");
  
      }
  
      print_r($testArr);
  
      if ($testArr){
  
          return "good";
  
      }
  
      else{
  
          return "bad";
  
      }
  
  }
  
  
  
  print_r(run("http://91.192.180.66:1935/tv-channels/stream02/playlist.m3u8"));
  
  return "ok";
  
  
  
  
  
   ?>

  It works correct on local machine, and returns:

  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  test
  
  Array ( [0] => Stream #0:2: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 108 kb/s ) good

  On heroku it works incorrect and returns:

  test
  
  Array ( ) bad

  My Procfile:

  web: vendor/bin/heroku-php-apache2 web/

  Source:
  https://github.com/taketa/testStream.git

  I’am new in Flask and has no idea how to fix it. Very need your help
  Thanks.

• How to add multiple audio files at specific times, on a silence audio file using ffmpeg?

  11 February 2020, by boblapointe

  I need to overlay audio files at specific times, on an existing silence.mp3. Something like that:

  [----[...audio1...]----------[...audio2...]---------------]

  I’ve tried the following but it doesn’t work:

  ffmpeg -y -i silence.mp3 -itsoffset 4 -i audio1.mp3 -itsoffset 30 -i audio2.mp3 -c:a copy final.mp3

  Any help would be appriciated. Thank you.

• Assistance required with filter graph construction(fast motion between times)

  6 January 2023, by D-MAN

  I am trying to re-create the following video, using ffmpeg.
https://youtu.be/eVQ9ysp0Pj0. "please check 0.19 minute for examples"
I have the following line of code which has most of the elements, except the part where is applies fast motion for 1s at certain outputs([vfr1][vfr2][vfr3])/times. currently it is only setpts=0.5*PTS[vboom] for the entire length of the video.

  


  exe = "-i " + file + " -i " + frame + " -i " + framestart + " -i " + frameEnd + " -i " + audioOverlay + " -filter_complex \"[0:v]pad="+mVideoWidth+":"+mVideoHeight+":576:0[vpad]; [vpad][1]overlay[vframed]; [vframed]split=3[vfr1][vfr2][vfr3]; [vfr1]reverse[vrev]; [vfr2][vrev][vfr3]concat=n=3,setpts=0.5*PTS[vboom]; [vboom][2]overlay=enable='lte(t,2)'[vpreout]; [vpreout][3]overlay=enable='gte(t,"+msec+"*3*0.5-2)' \" -map 4:a -b:v 8000k -shortest -preset ultrafast -crf 23 " + file2.getAbsolutePath();

  


  i have tried the following code snippets in various sections of the filter graph, with no luck!

  


  //[0:v]trim=0:2,setpts=PTS-STARTPTS[v1];[0:v]trim=2:5,setpts=2*(PTS-STARTPTS)[v2];[0:v]trim=5,setpts=PTS-STARTPTS[v3];
//[0:v]trim=0:10,setpts=PTS-STARTPTS[vfr1];[0:v]trim=10:30,setpts=PTS-STARTPTS[vfr2];[0:v]trim=start=30,setpts=PTS-STARTPTS[vfr3];
//[0:v]trim=2:3,setpts=0.75*(PTS-STARTPTS); [0:v]trim=4:5,setpts=0.75*(PTS-STARTPTS); [0:v]trim=7:8,setpts=0.75*(PTS-STARTPTS);
//[0:v]select='between(t,1,4)+between(t,4,6)',setpts=0.87*PTS;