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• ffmpeg recoded mp4 files error on mobiles in Video JS

  10 janvier 2019, par KJS

  We are converting seriously old .flv files to MP4 with FFMPEG. These are at least 10 years old.
  Back then all were rendered with early versions of Adobe Premiere.

  On desktop browsers all the files work and stream (...watching them feels like going back a century !)

  But when requesting the videos on the same pages on mobile devices (android and ios) Video JS doesn’t even show up.
  Perhaps the codec is just too old, but I was wondering if there could be another reason when converting them with this line :

  for i in *.flv; do ffmpeg -i "$i" "${i%.*}.mp4"; done

  If not, is it possible to detect this in Video JS, so we can show an announcement that the video is only visible on desktops ?

  I hope someone here has this knowledge !

  added on request of llogan

  ffmpeg version N-78967-gbaec6d8 Copyright (c) 2000-2016 the FFmpeg developers   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)   configuration: --prefix=/root/ffmpeg_build
  
  --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265   libavutil      55. 19.100 / 55. 19.100   libavcodec     57. 28.100 / 57. 28.100   libavformat    57. 28.100 / 57. 28.100   libavdevice    57.  0.101 / 57.  0.101   libavfilter     6. 39.102 / 
  
  6. 39.102   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.101 /  2.  0.101   libpostproc    54.  0.100 / 54.  0.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a_4293_06.mp4':   Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.28.100   Duration: 00:01:40.10, start: 0.023220, bitrate: 492 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 320x240, 376 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 123 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler At least one output file must be specified

• How to make terminal refer to more recent ffmpeg installation path (currently refers to Anaconda's installation) ? [on hold]

  29 janvier 2019, par John Doe

  I would like to use ffmpeg to convert a WAV audio file to MP3, but ffmpeg doesn’t have a native MP3 encoder. Their documentation says you can use the external libmp3lame encoding library to achieve this, which "requires the presence of the libmp3lame headers and library during configuration" by "explicitly configur[ing] the build with —enable-libmp3lame."

  I tried installing the latest version of ffmpeg to my desktop and followed the configuration instructions to include libmp3lame. However, when I tried it out in my terminal, I got an error saying that ffmpeg could not find the libmp3lame encoder.

  When I enter "which ffmpeg" into my terminal, the path I am given refers to another, older installation of ffmpeg that was included automatically when I installed Anaconda years ago.

  How can I change the path of the installation my terminal refers to so that when I execute ffmpeg commands, it will use the version I more recently configured to include libmp3lame on my desktop and not the older installation included in Anaconda’s directories ?

• How do you include ffmpeg in a php enviroment

  6 février 2019, par Joseph Williamson

  So looking through documentation and answers on stack overflow all leave out one detail thats throwing me off and thats how to actually include the library

  Following along the code listed here ffmpeg-php to create thumbnail of video

  class VideoTile
  
  {
  
      public static function createMovieThumb($srcFile, $destFile = "test.jpg")
  
      {
  
          // Change the path according to your server.
  
          $ffmpeg_path = 'D:\\ffmpeg\\bin\\';
  
  
  
          $output = array();
  
  
  
          $cmd = sprintf('%sffmpeg -i %s -an -ss 00:00:05 -r 1 -vframes 1 -y %s', 
  
              $ffmpeg_path, $srcFile, $destFile);
  
  
  
          if (strtoupper(substr(PHP_OS, 0, 3) == 'WIN'))
  
              $cmd = str_replace('/', DIRECTORY_SEPARATOR, $cmd);
  
          else
  
              $cmd = str_replace('\\', DIRECTORY_SEPARATOR, $cmd);
  
  
  
          exec($cmd, $output, $retval);
  
  
  
          if ($retval)
  
              return false;
  
  
  
          return $destFile;
  
      }
  
  }

  The ffmpeg path is D:\\ffmpeg\\bin\\ I have downloaded the latest release for ffmpeg(4.1) and the uncompressed file does not contain any directory for bin

  I am very confused as to actually use this even with detailed code saying how to if I do not even know how to dictate the proper path

  I also realize that the link is almost 5 years old but as there are no post outlining how to do this in so long I figure its about time for some clear,concise, detailed solutions