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• Call an external dynamic library using node

  25 septembre 2018, par Merc

  I need to edit clips using node using one of the existing video manipulation libraries. (Note : I am aware that I could run an existing editing executable like FFMPEG, but that’s not what I am after).

  Question : What’s the best way to call native libraries in Node ?

  Background information : I will need to talk to one one these libraries : Gstreamer, FFmpeg/LibAV or libVLC.

  My ideal outcome is to have a nice, robust library that I use directly using node, but my lack of experience in terms of using native libraries, and the somehow fragmented world of video editing libraries.

• FFmpeg android images to movie - error while opening encoder [duplicate]

  12 juin 2018, par trinadh thatakula

  This question already has an answer here :

  • FFMPEG (libx264) “height not divisible by 2”
    
    6 answers
    
  • ffmpeg add watermark libx264 width not divisible by 2 (853x480)
    
    1 answer
    

  I have been working on android-ffmpeg to convert images into videos and I have found the code I was looking(links below) and I have tried to execute this command

  val cmd5 = arrayOf("-analyzeduration", "1M", "-probesize", "1M", "-y", "-framerate", "1/3.79", "-i", Utils.outputPath + "image%d.jpg", "-i", audio!!.path, "-c:v", "libx264", "-tune", "stillimage", "-c:a", "aac", "-strict", "experimental", "-b:a", "192k", "-pix_fmt", "yuv420p", "-shortest", outputLocation.path)

  and I got error saying

  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  can any1 please help me

  I have taken code from here -> KotlinFFmpeg and the code snippet is from here -> MovieMaker.kt, please give me a solution, thanks in advance

  here are the logs

      2018-06-12 18:22:24.000 25364-25664/photo.video.maker D/FFmpeg: Running publishing updates method
  
  2018-06-12 18:22:24.096 25364-25364/photo.video.maker W/System.err: java.io.IOException: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   built with gcc 4.8 (GCC)
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libavutil      55. 17.103 / 55. 17.103
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libavcodec     57. 24.102 / 57. 24.102
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libavformat    57. 25.100 / 57. 25.100
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libavdevice    57.  0.101 / 57.  0.101
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libavfilter     6. 31.100 /  6. 31.100
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libswscale      4.  0.100 /  4.  0.100
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libswresample   2.  0.101 /  2.  0.101
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   libpostproc    54.  0.100 / 54.  0.100
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: [mjpeg @ 0xf193d000] Changing bps to 8
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: Input #0, image2, from '/storage/emulated/0/Photo Video Maker/image%d.jpg':
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   Duration: 00:02:35.39, start: 0.000000, bitrate: N/A
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1440x1919 [SAR 1:1 DAR 1440:1919], 0.26 tbr, 0.26 tbn, 0.26 tbc
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: [mp3 @ 0xf192d600] Skipping 0 bytes of junk at 61264.
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: [mjpeg @ 0xf193dc00] Changing bps to 8
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: Input #1, mp3, from '/data/user/0/photo.video.maker/files/audio2.mp3':
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   Metadata:
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     album_artist    : Various Artists
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     AccurateRipDiscID: 018-002fb7fe-0279b2d7-47111512-2
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     AccurateRipResult: AccurateRip: Accurate (confidence 10)   [0A38F342]
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     title           : Morning
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     encoded_by      : dBpoweramp Release 14.4
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     publisher       : EMI Classics
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     composer        : Edvard Grieg
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     TMED            : CD (Lossless)
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     genre           : Classical
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     compilation     : 1
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     album           : The Most Relaxing Classical Album in the World...Ever!
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     track           : 2/18
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     disc            : 1/2
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     artist          : Edvard Grieg
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Encoder         : Lame 3.99.5
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     UPC             : 024356665027
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     date            : 1999
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:   Duration: 00:04:18.04, start: 0.025056, bitrate: 321 kb/s
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Metadata:
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:       encoder         : LAME3.99r
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Stream #1:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 747x750 [SAR 1:1 DAR 249:250], 90k tbr, 90k tbn, 90k tbc
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Metadata:
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:       comment         : Cover (front)
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: [swscaler @ 0xf1125000] deprecated pixel format used, make sure you did set range correctly
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: [libx264 @ 0xf193ec00] height not divisible by 2 (1440x1919)
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err: Output #0, mp4, to '/storage/emulated/0/Photo Video Maker/video/movie_1528807939616.mp4':
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 0.26 fps
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Metadata:
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:       encoder         : Lavc57.24.102 libx264
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Stream #0:1: Audio: aac, 0 channels, 128 kb/s
  
  2018-06-12 18:22:24.097 25364-25364/photo.video.maker W/System.err:     Metadata:
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:       encoder         : Lavc57.24.102 aac
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err: Stream mapping:
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:   Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:   Stream #1:0 -> #0:1 (mp3 (native) -> aac (native))
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at photo.video.maker.tools.video.MovieMaker$convert$1.onFailure(MovieMaker.kt:78)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.onPostExecute(FFmpegExecuteAsyncTask.java:70)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.onPostExecute(FFmpegExecuteAsyncTask.java:10)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at android.os.AsyncTask.finish(AsyncTask.java:695)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at android.os.AsyncTask.-wrap1(Unknown Source:0)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:712)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:106)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at android.os.Looper.loop(Looper.java:164)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6494)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
  
  2018-06-12 18:22:24.098 25364-25364/photo.video.maker W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

• AFTER PHP-FFMpeg not converting (error with ffmpeg)

  15 juin 2018, par Magurean Dan Sergiu

  I have installed ffmpeg server side with all the dependencies, updated it. And then installed PHP-FFMpeg with Composer. Tested that ffmpeg is instaled with a ssh conexion.

  root@host [/opt/ffmpeg]# ffmpeg
  
  ffmpeg version N-81322-ge8b355a Copyright (c) 2000-2016 the FFmpeg developers
  
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17)
  
  configuration: --disable-yasm
  
  libavutil      55. 28.100 / 55. 28.100
  
  libavcodec     57. 51.100 / 57. 51.100
  
  libavformat    57. 46.100 / 57. 46.100
  
  libavdevice    57.  0.102 / 57.  0.102
  
  libavfilter     6. 51.100 /  6. 51.100
  
  libswscale      4.  1.100 /  4.  1.100
  
  libswresample   2.  1.100 /  2.  1.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options]     outfile}...
  
  
  
  Use -h to get full help or, even better, run 'man ffmpeg'

  But when I try to convert a video file with a php script it throws me a very long error.
  PHP Code :

  <?PHP
  
  include($_SERVER['DOCUMENT_ROOT']."/vendors/install/vendor/autoload.php");
  
  $ffmpeg = FFMpeg\FFMpeg::create();
  
  $video = $ffmpeg->open($_SERVER['DOCUMENT_ROOT'].'/resources/uploads/96048/ffd3c5e349fa5745159deef163b5c253.wmv');
  
  $video
  
         ->filters()
  
         ->synchronize();
  
  $format = new FFMpeg\Format\Video\X264();
  
  $format->on('progress', function ($video, $format, $percentage) {
  
      echo "$percentage % transcoded";});
  
  $video
  
        ->save($format,$_SERVER['DOCUMENT_ROOT'].'/resources/uploads/96048/ffd3c5e349fa5745159deef163b5c253.mp4');
  
  ?>

  Error displayed :

  <b>Fatal error</b>:  Uncaught exception 'Alchemy\BinaryDriver\Exception\ExecutionFailureException' with message 'ffmpeg failed to execute command '/usr/local/bin/ffmpeg' '-y' '-i' '/home/user/working/resources/uploads/23097/2efeb41a1a7085a1dbd469c4895ac23e.wmv' '-async' '1' '-metadata:s:v:0' 'start_time=0' '-threads' '12' '-vcodec' 'libx264' '-acodec' 'libfaac' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '128k' '-pass' '1' '-passlogfile' '/tmp/ffmpeg-passes57ad320a1b685j794u/pass-57ad320a1b716' '/home/user/working/resources/uploads/23097/2efeb41a1a7085a1dbd469c4895ac23e.mp4'' in /home/user/working/vendors/install/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/ProcessRunner.php:100↵Stack trace:↵#0 /home/user/working/vendors/install/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/ProcessRunner.php(72): Alchemy\BinaryDriver\ProcessRunner-&amp;gt;doExecutionFailure(''/usr/bin/ffmpe...')↵#1 / in <b>/home/user/working/vendors/install/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/Media/Video.php</b> on line <b>168</b><br />↵"

  Then I have took the basic code displayed upwards and ran it directly through ssh.

  '/usr/local/bin/ffmpeg' '-y' '-i' '/home/user/working/resources/uploads/23097/2efeb41a1a7085a1dbd469c4895ac23e.wmv' '-async' '1' '-metadata:s:v:0' 'start_time=0' '-threads' '12' '-vcodec' 'libx264' '-acodec' 'libfaac' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '128k' '-pass' '1' '-passlogfile' '/tmp/ffmpeg-passes57ad320a1b685j794u/pass-57ad320a1b716' '/home/user/working/resources/uploads/23097/2efeb41a1a7085a1dbd469c4895ac23e.mp4'

  And this is the response I get :

  ffmpeg version N-81322-ge8b355a Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17)
  
    configuration: --disable-yasm
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 51.100 / 57. 51.100
  
    libavformat    57. 46.100 / 57. 46.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 51.100 /  6. 51.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
  Guessed Channel Layout for Input Stream #0.0 : stereo
  
  Input #0, asf, from '/home/user/working/resources/uploads/23097/2efeb41a1a7085a1dbd469c4895ac23e.wmv':
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : © 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
    Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
  
      Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, fltp, 192 kb/s
  
      Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x720, 5942 kb/s, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
  
  Unknown encoder 'libx264'

  My question is what to do next ? I have wasted 3 days to make this work and this is the furthest I have come. How can I test if libx264 is installed corectly ? And if it is not installed corectly how cand I reinstal or make it work ?

  After a few modifications

  I have used an already installed ffmpeg, and removed a few commands (that were by default the same) and this time I used only the command line.

  The request

  '/home/user/working/vendors/install/ffmpeg-git-20160813-64bit-static/ffmpeg' '-y' '-i' '/home/user/working/resources/uploads/96048/ffd3c5e349fa5745159deef163b5c253.wmv' '-async' '1' '-metadata:s:v:0' 'start_time=0' '-vcodec' 'libx264' '-c:a' 'aac' '-b:v' '1000k' '-b:a' '128k' '-pass' '1' '-passlogfile' '/tmp/ffmpeg-passes57b053ce14a12ljm8a/pass-57b053ce14ad3' '/home/user/working/resources/uploads/96048/ffd3c5e349fa5745159deef163b5c253.mp4'

  The new result :

  ffmpeg version N-81328-gceab04f-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.1 (Debian 5.4.1-1) 20160803
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --disable-indev=sndio --disable-outdev=sndio --enable-librtmp --enable-libmfx --enable-libzimg --cc=gcc-5
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 51.102 / 57. 51.102
  
    libavformat    57. 46.101 / 57. 46.101
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 51.100 /  6. 51.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Guessed Channel Layout for Input Stream #0.0 : stereo
  
  Input #0, asf, from '/home/user/working/resources/uploads/96048/ffd3c5e349fa5745159deef163b5c253.wmv':
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : © 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
    Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
  
      Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels, fltp, 192 kb/s
  
      Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x720, 5942 kb/s, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
  
  -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0.
  
  [libx264 @ 0x442f5c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x442f5c0] ratecontrol_init: can't open stats file
  
  Output #0, mp4, to '/home/user/working/resources/uploads/96048/ffd3c5e349fa5745159deef163b5c253.mp4':
  
    Metadata:
  
      SfOriginalFPS   : 299700
  
      WMFSDKVersion   : 11.0.6001.7000
  
      WMFSDKNeeded    : 0.0.0.0000
  
      comment         : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
  
      title           : Wildlife in HD
  
      copyright       : © 2008 Microsoft Corporation
  
      IsVBR           : 0
  
      DeviceConformanceTemplate: AP@L3
  
      Stream #0:0(eng): Unknown: none
  
      Metadata:
  
        start_time      : 0
  
        encoder         : Lavc57.51.102 libx264
  
      Stream #0:1(eng): Unknown: none
  
      Metadata:
  
        encoder         : Lavc57.51.102 aac
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (vc1 (native) -> h264 (libx264))
  
    Stream #0:0 -> #0:1 (wmav2 (native) -> aac (native))
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height