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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.

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    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
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Sur d’autres sites (8291)

  • Issue in CV_FOURCC('H', '2', '6', '4')

    16 décembre 2014, par Ashwin

    I am trying to use H264 encoding type for compressing the live streaming from Camera (which is supporting the H264 codec) am getting below -
    [I am using OPENCV 3.0 beta version (latest)in windows 7 64 bit system .My camera is also supporting H264 codec (find more details below) ]
    My ffmpeg code got built with h264 lib :
    This build was compiled with the following external libraries :
    x264 20140826-git-dd79a61 http://videolan.org/developers/x264.html

    **error :**
    

    
Frame size = 1280x720
    
Could not find encoder for codec id 28: Encoder not foundERROR: Failed to write the video
    
Press any key to continue . . .

    Below is my code :

    int main(int argc, char *argv[])
    
{
    
 // QApplication a(argc, argv);
    

    
  VideoCapture cap(0); //capture webcam
    

    
  if (!cap.isOpened()) //if not successful then exit
    
  {
    
    cout << "Cannot open webcam";
    
    return -1;
    
  }
    

    
  namedWindow("Camera feed", 1); //create window
    

    
  cap.set(3, 1280);
    
  cap.set(4, 720);
    

    
  double dWidth  = cap.get(CV_CAP_PROP_FRAME_WIDTH); //get width of frames of video
    
  double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT); //get height of frames of video    
    

    

    
  Size frameSize(static_cast<int>(dWidth), static_cast<int>(dHeight));
    

    
  cout &lt;&lt; "Frame size = " &lt;&lt; dWidth &lt;&lt; "x" &lt;&lt; dHeight &lt;&lt; endl;
    

    
  VideoWriter oVideoWriter("video.avi", CV_FOURCC('X', '2', '6', '4'), 30, frameSize);
    

    
  if(!oVideoWriter.isOpened())
    
  {
    
    cout &lt;&lt; "ERROR: Failed to write the video" &lt;&lt; endl;
    
    return -1;
    
  }
    
  while(1)
    
  {
    
    Mat frame;
    
    bool bSuccess = cap.read(frame); //read a new frame from video
    

    
    if(!bSuccess) //if unsuccessful, break loop
    
    {
    
        cout &lt;&lt; "Cannot read frame from video file" &lt;&lt; endl;
    
        break;
    
    }
    

    
    oVideoWriter.write(frame); //write the frame into the file
    
    imshow("Camera feed", frame); //show the frame in "Live Feed" window
    

    
    cout &lt;&lt; "Recording" &lt;&lt; endl;
    

    
    if (waitKey(30) == 27)
    

    
    {
    
      cout&lt;&lt; "Esc key is pressed by user" &lt;&lt; endl;
    
      break;
    
    }
    

    
  }
    
  return 0;
    
}
    
</int></int>

    Here is the proof that my camera is supporting the H264 :

    C:\Users>ffmpeg -f dshow -list_options true -i video="Logitech HD Pro Webcam C920"
    
ffmpeg version N-66116-g720c21d Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Sep  4 2014 22:09:48 with gcc 4.8.3 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
    
  libavutil      54.  7.100 / 54.  7.100
    
  libavcodec     56.  1.100 / 56.  1.100
    
  libavformat    56.  4.100 / 56.  4.100
    
  libavdevice    56.  0.100 / 56.  0.100
    
  libavfilter     5.  0.103 /  5.  0.103
    
  libswscale      3.  0.100 /  3.  0.100
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  0.100 / 53.  0.100
    
[dshow @ 0000000002faf680] DirectShow video device options
    
[dshow @ 0000000002faf680]  Pin "Capture"
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=640x480 fps=5 max s=640x480 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=160x90 fps=5 max s=160x90 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=160x120 fps=5 max s=160x120 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=176x144 fps=5 max s=176x144 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=320x180 fps=5 max s=320x180 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=320x240 fps=5 max s=320x240 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=352x288 fps=5 max s=352x288 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=432x240 fps=5 max s=432x240 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=640x360 fps=5 max s=640x360 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=800x448 fps=5 max s=800x448 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=800x600 fps=5 max s=800x600 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=864x480 fps=5 max s=864x480 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=960x720 fps=5 max s=960x720 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=1024x576 fps=5 max s=1024x576 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=1280x720 fps=5 max s=1280x720 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=1600x896 fps=5 max s=1600x896 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=1920x1080 fps=5 max s=1920x1080 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=2304x1296 fps=2 max s=2304x1296 fps=2
    
[dshow @ 0000000002faf680]   pixel_format=bgr24  min s=2304x1536 fps=2 max s=2304x1536 fps=2
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=640x480 fps=5 max s=640x480 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=160x90 fps=5 max s=160x90 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=160x120 fps=5 max s=160x120 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=176x144 fps=5 max s=176x144 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=320x180 fps=5 max s=320x180 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=320x240 fps=5 max s=320x240 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=352x288 fps=5 max s=352x288 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=432x240 fps=5 max s=432x240 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=640x360 fps=5 max s=640x360 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=800x448 fps=5 max s=800x448 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=800x600 fps=5 max s=800x600 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=864x480 fps=5 max s=864x480 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=960x720 fps=5 max s=960x720 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=1024x576 fps=5 max s=1024x576 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=1280x720 fps=5 max s=1280x720 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=1600x896 fps=5 max s=1600x896 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=1920x1080 fps=5 max s=1920x1080 fps=30
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=2304x1296 fps=2 max s=2304x1296 fps=2
    
[dshow @ 0000000002faf680]   pixel_format=yuv420p  min s=2304x1536 fps=2 max s=2304x1536 fps=2
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=640x480 fps=5 max s=640x480 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=160x90 fps=5 max s=160x90 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=160x120 fps=5 max s=160x120 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=176x144 fps=5 max s=176x144 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=320x180 fps=5 max s=320x180 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=320x240 fps=5 max s=320x240 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=352x288 fps=5 max s=352x288 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=432x240 fps=5 max s=432x240 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=640x360 fps=5 max s=640x360 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=800x448 fps=5 max s=800x448 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=800x600 fps=5 max s=800x600 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=864x480 fps=5 max s=864x480 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=960x720 fps=5 max s=960x720 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=1024x576 fps=5 max s=1024x576 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=1280x720 fps=5 max s=1280x720 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=1600x896 fps=5 max s=1600x896 fps=30
    
[dshow @ 0000000002faf680]   vcodec=mjpeg  min s=1920x1080 fps=5 max s=1920x1080 fps=30
    
[dshow @ 0000000002faf680]  Pin "Capture"
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=640x480 fps=5 max s=640x480 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=160x90 fps=5 max s=160x90 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=160x120 fps=5 max s=160x120 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=176x144 fps=5 max s=176x144 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=320x180 fps=5 max s=320x180 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=320x240 fps=5 max s=320x240 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=352x288 fps=5 max s=352x288 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=432x240 fps=5 max s=432x240 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=640x360 fps=5 max s=640x360 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=800x448 fps=5 max s=800x448 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=800x600 fps=5 max s=800x600 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=864x480 fps=5 max s=864x480 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=960x720 fps=5 max s=960x720 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=1024x576 fps=5 max s=1024x576 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=1280x720 fps=5 max s=1280x720 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=1600x896 fps=5 max s=1600x896 fps=30
    
[dshow @ 0000000002faf680]   vcodec=h264  min s=1920x1080 fps=5 max s=1920x1080 fps=30
    
video=Logitech HD Pro Webcam C920: Immediate exit requested

  • on2avc : check number of channels

    4 octobre 2014, par Michael Niedermayer
    on2avc : check number of channels

    Fixes invalid memory access.
    

    CC : libav-stable@libav.org
    
Bug-ID : CVE-2014-8549
    
Found-by : Mateusz "j00ru" Jurczyk and Gynvael Coldwind
    
Signed-off-by : Anton Khirnov <anton@khirnov.net>
    • [DH] libavcodec/on2avc.c

  • Convert video to animated GIF with FFmpeg [migrated]

    5 janvier 2014, par flexage

    I have FFmpeg installed and working on my Ubuntu 12.04 LTS Server.

    I have managed to successfully automate the process of uploading a video and converting it to both H264/MP4 and OGV for display on the web.

    I also wanted to generate an animated GIF thumbnail for the video.

    I have got as far as the following, which I'm pretty sure is generating 2 frames a second for the first 10 seconds of the video :

    /usr/local/bin/ffmpeg -i "$3/uploads/video-queue/$1.$2" -vf scale=320:-1 -t 10 -r 2 "$3/uploads/video-queue/processing/$1.gif"

    What I would prefer to do is generate 1 frame every 25 seconds for the duration of the entire video, but also with a maximum number of frames set as something like 50 frames.

    I would prefer not to have dependencies on other components such as Image Magik, and I would like to keep this purely shell based.

    Thanks in advance ! You guys are way smarter than me for sure !

    Here is the complete console output from an ffmpeg run of the command above :

    root@ubuntu:/home/fckster/etc/php5# /home/fckster/public_html/cronscripts/process-video-gif.sh 1-1388841621 wmv /home/fckster/public_html
    
ffmpeg version N-59480-g8feaa83-syslint Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Jan  2 2014 00:32:20 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
    
  configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
    
  libavutil      52. 59.100 / 52. 59.100
    
  libavcodec     55. 47.100 / 55. 47.100
    
  libavformat    55. 22.102 / 55. 22.102
    
  libavdevice    55.  5.102 / 55.  5.102
    
  libavfilter     4.  0.103 /  4.  0.103
    
  libswscale      2.  5.101 /  2.  5.101
    
  libswresample   0. 17.104 /  0. 17.104
    
  libpostproc    52.  3.100 / 52.  3.100
    
[wmv3 @ 0x24dd680] Extra data: 8 bits left, value: 0
    
Guessed Channel Layout for  Input Stream #0.1 : stereo
    
Input #0, asf, from &#39;/home/fckster/public_html/uploads/video-queue/1-1388841621.wmv&#39;:
    
  Metadata:
    
    WM/ToolName     : Flip4Mac WMV Export Component for QuickTime (Mac)
    
    WM/ToolVersion  : 2204
    
    encoder         : Lavf54.29.104
    
  Duration: 00:01:11.30, start: 0.140000, bitrate: 2096 kb/s
    
    Stream #0:0: Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 1280x720, 29.97 tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 48 kb/s
    
[wmv3 @ 0x24dd680] Extra data: 8 bits left, value: 0
    
Output #0, gif, to &#39;/home/fckster/public_html/uploads/video-queue/processing/1-1388841621.gif&#39;:
    
  Metadata:
    
    WM/ToolName     : Flip4Mac WMV Export Component for QuickTime (Mac)
    
    WM/ToolVersion  : 2204
    
    encoder         : Lavf55.22.102
    
    Stream #0:0: Video: gif, pal8, 320x180, q=2-31, 200 kb/s, 100 tbn, 10 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (wmv3 -> gif)
    
Press [q] to stop, [?] for help
    
frame=   87 fps= 52 q=0.0 Lsize=    2131kB time=00:00:10.00 bitrate=1745.9kbits/s dup=0 drop=170    
    
video:2219kB audio:0kB subtitle:0 global headers:0kB muxing overhead -3.939009%

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