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  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • 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 (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

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  • Getting artifacts when trying to read video stream from YouTube

    23 février 2012, par givi

    I'm trying to read the video frames from the RTSP stream that I get from YouTube. Here is the link for my test video :

    rtsp ://v8.cache5.c.youtube.com/CiILENy73wIaGQkJlrXMiAG8BxMYDSANFEgGUgZ2aWRlb3MM/0/0/0/video.3gp

    If I'm reading frames from the local file - everything is fine, but when read them from a stream I get nothing but lots of artifacts. I've googled around and found out that there might be a problem with UDP packets and switching to TCP may help but I really can't find where it is possible to change this.

    Here is the function for reading a frame :

    bool nextFrame(AVFormatContext *pFormatCtx, AVCodecContext *pCodecCtx, int videoStream, AVFrame *pFrame) {  AVPacket packet;
    
    int frameFinished = 0;
    

    
    while( !frameFinished && av_read_frame(pFormatCtx, &packet) >= 0 ) {
    
        // Is this a packet from the video stream?
    
        if( packet.stream_index == videoStream ) {
    
            // Decode video frame
    
            avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
    
        }
    

    
        // Free the packet that was allocated by av_read_frame
    
        av_free_packet(&packet);    
    
       }    
    
       return frameFinished!=0;  
    
}

    I'm also getting lots of error messages in my log :

    [h263 @ 0x7804c00] warning: first frame is no keyframe
    
[h263 @ 0x7804c00] illegal ac vlc code at 6x1
    
[h263 @ 0x7804c00] Error at MB: 18
    
[h263 @ 0x7804c00] concealing 99 DC, 99 AC, 99 MV errors
    
[h263 @ 0x7804c00] I cbpy damaged at 10 4
    
[h263 @ 0x7804c00] Error at MB: 58
    
[h263 @ 0x7804c00] concealing 99 DC, 99 AC, 99 MV errors
    
[h263 @ 0x7804c00] I cbpy damaged at 6 6
    
[h263 @ 0x7804c00] Error at MB: 78
    
[h263 @ 0x7804c00] concealing 76 DC, 76 AC, 76 MV errors
    
[h263 @ 0x7804c00] I cbpy damaged at 5 5
    
[h263 @ 0x7804c00] Error at MB: 65
    
[h263 @ 0x7804c00] concealing 88 DC, 88 AC, 88 MV errors
    
[h263 @ 0x7804c00] illegal ac vlc code at 7x5
    
[h263 @ 0x7804c00] Error at MB: 67
    
[h263 @ 0x7804c00] concealing 86 DC, 86 AC, 86 MV errors

    ...and so on

    edit : this is 99.9% a UDP-TCP problem. I've found this link :

    rtsp ://195.200.199.8/mpeg4/media.amp

    This is some test camera available online. It streams with artifacts. However if it has get parameter 'tcp' and if I use this

    rtsp ://195.200.199.8/mpeg4/media.amp ?tcp

    everything works without artifacts.

    So to correct my question : is there any way to force YouTube or ffmpeg to use TCP ?

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