Recherche avancée

Médias (91)

Autres articles (94)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (5746)

  • ffmpeg : remove unused and errorneous AVFrame timestamp check

    1er octobre 2016, par Hendrik Leppkes
    ffmpeg : remove unused and errorneous AVFrame timestamp check

    Decoders have previously not used AVFrame.pts, and with the upcoming
    
deprecation of pkt_pts (in favor of pts), this would lead to an errorneous
    
interpration of timestamps.
    • [DH] ffmpeg.c

  • How to pipe sequence of thumbnails/screenshots from ffmpeg to nodejs for further processing ?

    30 décembre 2015, par Dmitry Ivanov

    What I want to achieve is to take screenshots continuously and pass them to nodejs application in order to process each one separately and do some other stuff. I need this for Linux environment only. I picked ffmpeg with x11grab as a screenshots provider. The following command works just fine :

    ffmpeg -t 10 -s 1366x768 -f x11grab -i :0.0+0,0 -vf fps=30 output_%d.png -y

    It creates 300 consequent frames of my screen during 10 seconds period. Then I want to redirect the output to my nodejs app rather than just to write files on the hard drive. So I’m calling ffmpeg from node :

    var spawn = require('child_process').spawn,
    
    fps = 30,
    
    duration = 10,
    
    screenSize = {w: 1366, h: 768},
    
    args = [
    
        '-t', 
    
        duration, 
    
        '-s', 
    
        screenSize.w + 'x' + screenSize.h, 
    
        '-f', 
    
        'x11grab', 
    
        '-i', 
    
        ':0.0', 
    
        '-vf',
    
        'fps=' + fps,
    
        '-f',
    
        'mjpeg',
    
        'pipe:1'
    
    ],
    
    ff = spawn('ffmpeg', args);
    

    
ff.stdout.on('data', function (data) {
    
    console.log('Data size: ' + data.length);
    
});
    

    
ff.stdout.on('end', function (data) {
    
    console.log('Stream end');
    
});
    

    
ff.stderr.on('data', function (data) {
    
    console.log('ff error: ' + data);
    
});

    I apologize for a long log, but it’s important :

    ff error: ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
    
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
    
  libavutil      55. 11.100 / 55. 11.100
    
  libavcodec     57. 20.100 / 57. 20.100
    
  libavformat    57. 20.100 / 57. 20.100
    
  libavdevice    57.  0.100 / 57.  0.100
    
  libavfilter     6. 21.101 /  6. 21.101
    
  libavresample   3.  0.  0 /  3.  0.  0
    
  libswscale      4.  0.100 /  4.  0.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    

    
ff error: Input #0, x11grab, from ':0.0':
    
  Duration: N/A, start: 1451414448.216650, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1366x768, 29.97 fps, 29.97 tbr, 1000k tbn, 
    
ff error: 29.97 tbc
    

    
ff error: [swscaler @ 0x34238a0] deprecated pixel format used, make sure you did set range correctly
    

    
ff error: Output #0, mjpeg, to 'pipe:1':
    
  Metadata:
    
    encoder         : 
    
ff error: Lavf57.20.100
    
    Stream #0:0: Video: mjpeg, yuvj444p(pc), 1366x768, q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc
    
    Metadata:
    
      encoder         : Lavc57.20.100 mjpeg
    
    Side data:
    
      unknown side data type 10 (24 bytes)
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
    
Press [q] to stop, [?] for help
    

    
ff error: [swscaler @ 0x34238a0] Warning: data is not aligned! This can lead to a speedloss
    

    
Data size: 65536
    
Data size: 65536
    
Data size: 21413
    
Data size: 65536
    
Data size: 65536
    
Data size: 45581
    
Data size: 65536
    
Data size: 65536
    
Data size: 62377
    
Data size: 65536
    
Data size: 65536
    
Data size: 45581
    
Data size: 65536
    
Data size: 65536
    
Data size: 21413
    
Data size: 65536
    
Data size: 60933
    
Data size: 65536
    
Data size: 49550
    
Data size: 65536
    
Data size: 36709
    
Data size: 65536
    
Data size: 27035
    
Data size: 65536
    
Data size: 20131
    
Data size: 65536
    
Data size: 15887
    
Data size: 65536
    
Data size: 15887
    
Data size: 65536
    
Data size: 15887
    
Data size: 65536
    
Data size: 15911
    
Data size: 65536
    
Data size: 15911
    
Data size: 65536
    
Data size: 15911
    
ff error: frame=   16 fps=0.0 q=24.8 size=    1819kB time=00:00:00.53 bitrate=27935.6kbits/s speed=1.04x    
    
Data size: 65536
    
Data size: 15911
    
Data size: 65536
    
Data size: 15911
    
Data size: 65536
    
Data size: 15919
    
Data size: 65536
    
Data size: 15919
    
Data size: 65536
    
Data size: 15919
    
Data size: 65536
    
Data size: 15919
    
Data size: 65536
    
Data size: 15919
    
Data size: 65536
    
Data size: 15911
    
Data size: 65536
    
Data size: 15911
    
Data size: 65536
    
Data size: 15906
    
Data size: 65536
    
Data size: 15906
    
Data size: 65536
    
Data size: 15917
    
Data size: 65536
    
Data size: 15999
    
Data size: 65536
    
Data size: 15949
    
Data size: 65536
    
Data size: 15997
    
Data size: 65536
    
Data size: 15965
    
ff error: frame=   32 fps= 30 q=24.8 size=    3092kB time=00:00:01.06 bitrate=23743.7kbits/s speed=1.01x    
    
Data size: 65536
    
Data size: 16025
    
Data size: 65536
    
Data size: 15978
    
Data size: 65536
    
Data size: 15963
    
Data size: 65536
    
Data size: 16028
    
Data size: 65536
    
Data size: 15976
    
Data size: 65536
    
Data size: 15958
    
Data size: 65536
    
Data size: 15940
    
Data size: 65536
    
Data size: 15992
    
Data size: 65536
    
Data size: 15962
    
Data size: 65536
    
Data size: 16010
    
Data size: 65536
    
Data size: 15941
    
Data size: 65536
    
Data size: 15941
    
Data size: 65536
    
Data size: 15973
    
Data size: 65536
    
Data size: 15943
    
Data size: 65536
    
Data size: 15947
    
Data size: 65536
    
Data size: 15947
    
ff error: frame=   48 fps= 30 q=24.8 size=    4365kB time=00:00:01.60 bitrate=22349.6kbits/s speed=1.01x    
    
Data size: 65536
    
Data size: 15982
    
Data size: 65536
    
Data size: 15982
    
Data size: 65536
    
Data size: 15956
    
Data size: 65536
    
Data size: 15956
    
Data size: 65536
    
Data size: 15956
    
Data size: 65536
    
Data size: 16001
    
Data size: 65536
    
Data size: 15930
    
Data size: 65536
    
Data size: 15922
    
Data size: 65536
    
Data size: 15924
    
Data size: 65536
    
Data size: 15924
    
Data size: 65536
    
Data size: 15924
    
Data size: 65536
    
Data size: 15924
    
Data size: 65536
    
Data size: 15911
    
Data size: 65536
    
Data size: 15924
    
Data size: 65536
    
Data size: 15985
    
Data size: 65536
    
Data size: 15985
    
ff error: frame=   64 fps= 30 q=24.8 size=    5638kB time=00:00:02.13 bitrate=21651.3kbits/s speed=1.01x    
    
Data size: 65536
    
Data size: 15985
    
Data size: 65536
    
Data size: 15924
    
Data size: 65536
    
Data size: 15976
    
Data size: 65536
    
Data size: 15976
    
Data size: 65536
    
Data size: 15958
    
Data size: 65536
    
Data size: 16319
    
Data size: 65536
    
Data size: 16558
    
Data size: 65536
    
Data size: 16576
    
Data size: 65536
    
Data size: 16564
    
Data size: 65536
    
Data size: 16582
    
Data size: 65536
    
Data size: 16589
    
Data size: 65536
    
Data size: 16587
    
Data size: 65536
    
Data size: 16446
    
Data size: 65536
    
Data size: 16450
    
Data size: 65536
    
Data size: 16450
    
Data size: 65536
    
Data size: 16450
    
ff error: frame=   80 fps= 30 q=24.8 size=    6918kB time=00:00:02.66 bitrate=21251.0kbits/s speed=1.01x    
    
Data size: 65536
    
Data size: 16568
    
Data size: 65536
    
Data size: 16575
    
Data size: 65536
    
Data size: 16585
    
Data size: 65536
    
Data size: 18182
    
Data size: 65536
    
Data size: 17203
    
Data size: 65536
    
Data size: 16769
    
Data size: 65536
    
Data size: 16734
    
Data size: 65536
    
Data size: 16823
    
Data size: 65536
    
Data size: 16338
    
Data size: 65536
    
Data size: 16455
    
Data size: 65536
    
Data size: 16406
    
Data size: 65536
    
Data size: 16645
    
Data size: 65536
    
Data size: 16800
    
Data size: 65536
    
Data size: 16800
    
Data size: 65536
    
Data size: 16800
    
Data size: 65536
    
Data size: 16806
    
ff error: frame=   96 fps= 30 q=24.8 size=    8204kB time=00:00:03.20 bitrate=21001.8kbits/s speed=   1x    
    
Data size: 65536
    
Data size: 16795
    
Data size: 65536
    
Data size: 16804
    
Data size: 65536
    
Data size: 16770
    
Data size: 65536
    
Data size: 16760
    
Data size: 65536
    
Data size: 16813
    
Data size: 65536
    
Data size: 16445
    
Data size: 65536
    
Data size: 16259
    
Data size: 65536
    
Data size: 16260
    
Data size: 65536
    
Data size: 16265
    
Data size: 65536
    
Data size: 16284
    
Data size: 65536
    
Data size: 16233
    
Data size: 65536
    
Data size: 16233
    
Data size: 65536
    
Data size: 16182
    
Data size: 65536
    
Data size: 16058
    
Data size: 60561
    
ff error: frame=  111 fps= 30 q=24.8 size=    9384kB time=00:00:03.70 bitrate=20776.1kbits/s speed=   1x    
    
Data size: 61813
    
Data size: 61813
    
Data size: 61813
    
Data size: 61813
    
Data size: 61813
    
Data size: 61781
    
Data size: 61784
    
Data size: 61796
    
Data size: 61842
    
Data size: 61839
    
Data size: 61793
    
Data size: 61810
    
Data size: 61844
    
Data size: 61844
    
Data size: 61850
    
Data size: 61841
    
ff error: frame=  127 fps= 30 q=24.8 size=   10350kB time=00:00:04.23 bitrate=20027.8kbits/s speed=   1x    
    
Data size: 61858
    
Data size: 61853
    
Data size: 61833
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
ff error: frame=  142 fps= 30 q=24.8 size=   11256kB time=00:00:04.73 bitrate=19480.5kbits/s speed=   1x    
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
ff error: frame=  158 fps= 30 q=24.8 size=   12223kB time=00:00:05.26 bitrate=19011.4kbits/s speed=   1x    
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61867
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
ff error: frame=  173 fps= 30 q=24.8 size=   13129kB time=00:00:05.76 bitrate=18650.3kbits/s speed=   1x    
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
ff error: frame=  188 fps= 30 q=24.8 size=   14035kB time=00:00:06.26 bitrate=18346.6kbits/s speed=   1x    
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
ff error: frame=  203 fps= 30 q=24.8 size=   14941kB time=00:00:06.76 bitrate=18087.8kbits/s speed=   1x    
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
ff error: frame=  219 fps= 30 q=24.8 size=   15907kB time=00:00:07.30 bitrate=17850.8kbits/s speed=   1x    
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
ff error: frame=  234 fps= 30 q=24.8 size=   16813kB time=00:00:07.80 bitrate=17658.1kbits/s speed=   1x    
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
Data size: 61850
    
ff error: frame=  250 fps= 30 q=24.8 size=   17780kB time=00:00:08.33 bitrate=17478.0kbits/s speed=   1x    
    
Data size: 61850
    
Data size: 61712
    
Data size: 61712
    
Data size: 61712
    
Data size: 61712
    
Data size: 61712
    
Data size: 61712
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
ff error: frame=  265 fps= 30 q=24.8 size=   18675kB time=00:00:08.83 bitrate=17319.4kbits/s speed=   1x    
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
ff error: frame=  280 fps= 30 q=24.8 size=   19563kB time=00:00:09.33 bitrate=17171.2kbits/s speed=   1x    
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
ff error: frame=  295 fps= 30 q=24.8 size=   20452kB time=00:00:09.83 bitrate=17038.0kbits/s speed=   1x    
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
Data size: 60638
    
ff error: frame=  300 fps= 30 q=24.8 Lsize=   20748kB time=00:00:10.00 bitrate=16996.6kbits/s speed=0.998x    
    
video:20748kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
    

    
Stream end

    The error messages are weird too, but not the biggest problem for now, so let’s omit them.

    Looking at all the data coming from ffmpeg I assume that the images are coming as a single stream without any separation. I don’t think that looking into binary data and seeking for certain flag bytes is a good idea to solve the problem and separate the images. The command line I mentioned in the top of the post does separate writes to hard drive that means it produces separate writable streams per each screenshot. And it doesn’t do so for a spawned process from nodejs.

    What am I missing ?

  • pcm_bluray : rename pcm-mpeg.c to pcm-bluray.c

    30 août 2013, par Christian Schmidt
    pcm_bluray : rename pcm-mpeg.c to pcm-bluray.c

    The original idea was to collect PCM codecs that could appear in various
    
MPEG streams in this file. Discussion in IRC lead to the conclusion that
    
one codec per file would be better and stop the need for #ifdefs.
    • [DH] libavcodec/Makefile
    • [DH] libavcodec/pcm-bluray.c

Navigation