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• FFmpeg : Read profile level information from mp4

  31 mars 2016, par Martin

  I have a mp4 file and need the profile level of it. FFmpeg says, it has baseline profile, which is what I need, but I need also the level.

  Here is what I get from FFmpeg :

  ffmpeg version 0.8, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Jul 20 2011 13:32:19 with gcc 4.4.3
  
    configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264
  
    libavutil    51.  9. 1 / 51.  9. 1
  
    libavcodec   53.  7. 0 / 53.  7. 0
  
    libavformat  53.  4. 0 / 53.  4. 0
  
    libavdevice  53.  1. 1 / 53.  1. 1
  
    libavfilter   2. 23. 0 /  2. 23. 0
  
    libswscale    2.  0. 0 /  2.  0. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test-show.mp4':
  
    Metadata:
  
      major_brand     : f4v 
  
      minor_version   : 0
  
      compatible_brands: isommp42m4v 
  
      creation_time   : 2012-03-21 16:00:00
  
    Duration: 00:56:07.40, start: 0.000000, bitrate: 2004 kb/s
  
      Stream #0.0(eng): Video: h264 (Baseline), yuv420p, 854x480 [PAR 1:1 DAR 427:240], 1904 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
        creation_time   : 2012-03-21 16:00:00
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 96 kb/s
  
      Metadata:
  
        creation_time   : 2012-03-21 16:00:00
  
  At least one output file must be specified

  Is there any option other than -i I can use to get the level information ?

• Encode flv video with no audio with ffmpeg

  15 avril 2012, par David Bengoa

  I'm making an application that needs to convert videos to webm or mp4, it works great with all videos I've tried, but it fails if I use a flv file with no audio channels.

  $ ffmpeg -i 0986229665-339108519108-86498841039-6078455325.flv out.webm
  
  ffmpeg version 0.7.3-4:0.7.3-0ubuntu0.11.10.1, Copyright (c) 2000-2011 the Libav developers
  
    built on Jan  4 2012 16:08:51 with gcc 4.6.1
  
    configuration: --extra-version='4:0.7.3-0ubuntu0.11.10.1' --arch=amd64 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
  
    WARNING: library configuration mismatch
  
    avutil      configuration: --extra-version='4:0.7.3ubuntu0.11.10.1' --arch=amd64 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-libopenjpeg --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdirac --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libvo-aacenc --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-libdc1394 --enable-shared --disable-static
  
    avcodec     configuration: --extra-version='4:0.7.3ubuntu0.11.10.1' --arch=amd64 --prefix=/usr --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-vaapi --enable-libopenjpeg --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdirac --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libvo-aacenc --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-libdc1394 --enable-shared --disable-static
  
    libavutil    51.  7. 0 / 51.  7. 0
  
    libavcodec   53.  6. 0 / 53.  6. 0
  
    libavformat  53.  3. 0 / 53.  3. 0
  
    libavdevice  53.  0. 0 / 53.  0. 0
  
    libavfilter   2.  4. 0 /  2.  4. 0
  
    libswscale    2.  0. 0 /  2.  0. 0
  
    libpostproc  52.  0. 0 / 52.  0. 0
  
  [flv @ 0x2184560] Could not find codec parameters (Audio: [0][0][0][0] / 0x0000, 0 channels)
  
  [flv @ 0x2184560] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from '0986229665-339108519108-86498841039-6078455325.flv':
  
    Metadata:
  
      audiocodecid    : -1
  
      server          : Red5 Server 1.0.0 RC1 $Rev: 4193 $
  
      duration        : 3
  
      canSeekToEnd    : true
  
      videocodecid    : 2
  
    Duration: 00:00:03.02, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Video: flv, yuv420p, 640x362, 1k tbr, 1k tbn, 1k tbc
  
      Stream #0.1: Audio: [0][0][0][0] / 0x0000, 0 channels
  
  Incompatible sample format '(null)' for codec 'libvorbis', auto-selecting format 's16'
  
  [buffer @ 0x21852c0] w:640 h:362 pixfmt:yuv420p
  
  [libvpx @ 0x2184040] v0.9.6
  
  [libvorbis @ 0x2185ee0] oggvorbis_encode_init: init_encoder failed
  
  Output #0, webm, to 'out.webm':
  
      Stream #0.0: Video: libvpx, yuv420p, 640x362, q=2-31, 200 kb/s, 90k tbn, 1k tbc
  
      Stream #0.1: Audio: libvorbis, 0 channels, s16, 64 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height

  If I pass the -an option, it works, but I can't do that because then all videos wouldn't have audio.

  Any ideas ?

• PHP - FFMPEG - Unable to apply multiple regular expressions on media output

  9 avril 2012, par Parth G

  I am writing a php script (I have to use php) to cycle through a dir of media files and displaying media information in a chart.

  Right now, I'm trying to do it on 1 file.

  I can successfully do so. I currently can parse the output (using regular expressions) to obtain information such as file name, duration, resolution, etc

  I was told that I can combine the regular expressions to make it more efficient.

  When I do however, I am unable to parse the ffmpeg output correctly.

  Consequently, I've tried copying the output to a string and parsing that using multiple expressions and it works just fine.

  Any help is appreciated.

  Thanks.

  ---

  Working code

  $media_info = "'test.mkv': Metadata: creation_time : 2011-03-12 09:04:18 Duration: 00:21:44.10, start: 0.000000, bitrate: 500 kb/s Chapter #0.0: start 0.097000, end 1304.107000 Metadata: title : 00:00:00.097 Stream #0:0: Video: h264 (High), yuv420p, 720x400 [SAR 80:81 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) Stream #0:1: Audio: aac, 48000 Hz, stereo, s16 (default) At least one output file must be specified";
  
  
  
  
  
  $file = array();
  
  $file_test = preg_match_all("/'([a-zA-Z0-9\._]*\.[a-zA-Z0-9]*)'.* Duration: ([0-9]{2,}:[0-9]{2}:[0-9]{2}\.[0-9]*)/", $media_info, $file);;
  
  var_dump($file)

  ---

  Not Working Code

  ob_start();
  
  passthru("C:\\wamp\\www\\ffmpeg\\bin\\ffmpeg.exe -i \"{$videofile}\" 2>&1");
  
  $raw_data = ob_get_contents();
  
  ob_end_clean();
  
  
  
  
  
  $ffmpeg_info =  explode("from", $raw_data);
  
  
  
  
  
  $media_info = $ffmpeg_info[1];
  
  
  
  $file = array();
  
  $file_test = preg_match_all("/'([a-zA-Z0-9\._]*\.[a-zA-Z0-9]*)'.* Duration: ([0-9]{2,}:[0-9]{2}:[0-9]{2}\.[0-9]*)/", $media_info, $file);;
  
  var_dump($file)

  ---

  New Code

  I tried using the ffmpeg-php extension and the following works (except for printing the bit rate)

  $movie = new ffmpeg_movie($video_file);
  
  
  
  echo $movie->getFilename();
  
  echo "<br />" ; 
  
  echo $movie->getDuration();
  
  echo "<br />" ;
  
  echo $movie->getFrameWidth();
  
  echo "x";
  
  echo $movie->getFrameHeight();
  
  echo "<br />" ; 
  
  echo $movie->getBitRate();
  
  echo "<br />" ; 
  
  echo $movie->getVideoBitRate();
  
  echo "<br />" ; 
  
  echo $movie->getAudioBitRate();
  
  echo "<br />" ;
  
  echo $movie->getVideoCodec();
  
  echo "<br />" ;
  
  echo $movie->getAudioCodec();
  
  ?>