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  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • MediaSPIP Player : problèmes potentiels

    22 février 2011, par

    Le lecteur ne fonctionne pas sur Internet Explorer
    Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
    Si dans la configuration de ce module Apache vous avez une ligne qui ressemble à la suivante, essayez de la supprimer ou de la commenter pour voir si le lecteur fonctionne correctement : /** * GeSHi (C) 2004 - 2007 Nigel McNie, (...)

  • Participer à sa documentation

    10 avril 2011

    La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
    Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
    Pour ce faire, vous pouvez vous inscrire sur (...)

Sur d’autres sites (12053)

  • avutil/mathematics : speed up av_gcd by using Stein’s binary GCD algorithm

    11 octobre 2015, par Ganesh Ajjanagadde
    avutil/mathematics : speed up av_gcd by using Stein’s binary GCD algorithm
    

    This uses Stein’s binary GCD algorithm :
    https://en.wikipedia.org/wiki/Binary_GCD_algorithm
    to get a roughly 4x speedup over Euclidean GCD on standard architectures
    with a compiler intrinsic for ctzll, and a roughly 2x speedup otherwise.
    At the moment, the compiler intrinsic is used on GCC and Clang due to
    its easy availability.

    Quick note regarding overflow : yes, subtractions on int64_t can, but the
    llabs takes care of that. The llabs is also guaranteed to be safe, with
    no annoying INT64_MIN business since INT64_MIN being a power of 2, is
    shifted down before being sent to llabs.

    The binary GCD needs ff_ctzll, an extension of ff_ctz for long long (int64_t). On
    GCC, this is provided by a built-in. On Microsoft, there is a
    BitScanForward64 analog of BitScanForward that should work ; but I can’t confirm.
    Apparently it is not available on 32 bit builds ; so this may or may not
    work correctly. On Intel, per the documentation there is only an
    intrinsic for _bit_scan_forward and people have posted on forums
    regarding _bit_scan_forward64, but often their documentation is
    woeful. Again, I don’t have it, so I can’t test.

    As such, to be safe, for now only the GCC/Clang intrinsic is added, the rest
    use a compiled version based on the De-Bruijn method of Leiserson et al :
    http://supertech.csail.mit.edu/papers/debruijn.pdf.

    Tested with FATE, sample benchmark (x86-64, GCC 5.2.0, Haswell)
    with a START_TIMER and STOP_TIMER in libavutil/rationsl.c, followed by a
    make fate.

    aac-am00_88.err :
    builtin :
    714 decicycles in av_gcd, 4095 runs, 1 skips

    de-bruijn :
    1440 decicycles in av_gcd, 4096 runs, 0 skips

    previous :
    2889 decicycles in av_gcd, 4096 runs, 0 skips

    Signed-off-by : Ganesh Ajjanagadde <gajjanagadde@gmail.com>
    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>

    • [DH] libavutil/intmath.h
    • [DH] libavutil/mathematics.c
  • 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 :

    &lt;?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
  • AFTER PHP-FFMpeg not converting (error with ffmpeg)

    15 août 2016, 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 :

    &lt;?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