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• ffmpeg : get duration using a script : Unable to find a suitable output format for '2>&1 | grep "Duration"' [duplicate]

  6 novembre 2017, par A_Matar

  This question already has an answer here :

  • Python subprocess command with pipe
    
    7 answers
    

  I am trying to get the duration of a media file I have by running these lines from a python script :

  test_file = 'path_to_file.mp4'
  
  ffmpeg_get_mediafile_length = ["ffmpeg", "-i", test_file, '2>&1 | grep "Duration"']
  
  output = subprocess.Popen(ffmpeg_get_mediafile_length,
  
                          stdout = subprocess.PIPE
  
                          ).stdout.read()
  
  print output # this gives None
  
  matches = re_length.search(output)
  
  print matches

  Here is the ffmpeg logs I get alongside with the error I get :

  ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.37)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'path_to_media_file':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.83.100
  
    Duration: 00:22:25.89, start: 0.000000, bitrate: 6059 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 6057 kb/s, 15 fps, 30 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  [NULL @ 0x7fedac802200] Unable to find a suitable output format for '2>&1 | grep "Duration"'
  
  2>&1 | grep "Duration": Invalid argument

• do something with script output

  3 novembre 2017, par Opolo Webdesign

  I’m lazy :) so I would like to automate some things on my network. Currently I’m running a script that automatically downloads the series I watch every week. Based on what is downloaded another script searches the web for subtitles. Some downloads however have subtitles with them, so searching for subtitles is not necessary. I would like to check every download for subtitles and get notified (or better move the file) if the file has the correct subtitles.

  I started with the following :

  find /volume2/Downloads/ -type f -mmin -30 | while IFS= read -r file; do
  
      ffmpeg -i "${file}"
  
  done

  This works and shows me the output of the ffmpeg command for each file newer than 30 minutes. I would like to work with the result given by ffmpeg so that when certain characters are present in the output, I’m notified via mail. My Linux scripting skills however stop at the script I got. I’m a web developer so I understand the logic behind a script like this, but not the specific code or commands.

  Characters that I’m looking for :

  • (eng) : Subtitle :
  • (dut) : Subtitle :

  Can this be done ?

  Edit :

  I did some more research and did some changes to my script :

  find /volume2/Downloads/ -type f -mmin -60 | while IFS= read -r file; do
  
      if ffmpeg -i "${file}" | grep -q '(dut): Subtitle:'; then
  
          echo "matched"
  
      fi
  
  done

  Instead of "matched" it shows the ffmpeg output, but it’s probably a step in the right direction ?

• Converting video with ffmpeg from a script not in the root folder

  30 octobre 2017, par Daniel Ormerod

  I am using ffmpeg to convert videos, create thumbnails etc.

  I made the below function to convert a video and when I run it in a script in the root folder it converts ok.

  However, I am using ajax to upload the video and the script is located /ajax/upload-video.php and when I run it in that folder it fails to convert.

  I have tried sending the $src and $dest up with ../ before the filenames to go back a folder but it isn’t working.

  Can anybody help ?

  Do I need to add something to the $command line to tell it to go back a folder ?

  These are the variables being used in the function :

  $ffmpegpath = 'ffmpeg.exe';
  
  $src = 'videos/video1.wmv';
  
  $dest = 'videos/video1.mp4';

  I have tried :

  $ffmpegpath = 'ffmpeg.exe';
  
  $src = '../videos/video1.wmv';
  
  $dest = '../videos/video1.mp4';

  And the function :

  function convert_video($src, $dest) {
  
  
  
      global $ffmpegpath;
  
  
  
      if (!file_exists($src)) {
  
  
  
          echo '<p>The file does not exist</p>';
  
  
  
      } else {
  
  
  
          $command = "$ffmpegpath -i $src $dest";
  
  
  
          @exec($command, $ret);
  
  
  
          if (!file_exists($dest)) {
  
  
  
              echo '<p>The file failed to create</p>';
  
  
  
          } else {
  
  
  
              if (filesize($dest)==0) {
  
  
  
                  echo '<p>The file created but has not filesize</p>';
  
  
  
              } else {
  
  
  
                  echo '<p>File Created Successfully</p>';
  
  
  
              }
  
  
  
          }
  
  
  
      }
  
  
  
  }