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  • 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 (...)

  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

  • 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 (7095)

  • How to get the exact macroblock bit sizes from H.264 (CABAC) bitstream

    15 juillet 2013, par Bhaskar Dey

    I am interested to get the exact size of a macroblock (MB) in bits form H.264 bitstream (CABAC entropy coded). I would like to verify this against the MB sizes available form commercial bitstream analyzers (like Codecvisa etc). I had a look at the FFmpeg source files cabac.h, h264_cabac.c and h.264.c.

    In function ff_h264_decode_mb_cabac(H264Context *h) of h264_cabac.c, I computed the MB sizes using CABAC bytestream pointer as :

    int ff_h264_decode_mb_cabac(H264Context *h) {
    

    
    int b=(int)h->cabac.bytestream; 
    

    
    // function body of ff_h264_decode_mb_cabac() unmodified
    

    
    b=(int)h->cabac.bytestream-b;
    
    //print value of (b<<3), i.e., MB bit size(b is the difference in bytes);
    

    
}

    This gives the value of MB size in bits but accurate within 16 of the actual bit size found using H.264 analyzers. I also printed the contents of h->cabac.bytestream (in binary) at the start and at the end of the function call but couldn't locate the exact MB-boundary bit positions(see following table for an example). Any hint would be of immense help.

    Frame No  MB index(type)        start(hex)               end(hex)                 b<<3  Exact size(analyzer)
    
....
    
Frame 2,  742(P_L0_16x16),      1110011110100001 (e7a1), 0000001110010110 (0396),   80    78
    
Frame 2,  743(P_8x8),           0000001110010110 (0396), 0000101101000101 (0b45),  400   400
    
Frame 2,  744(P_L0_L0_16x8),    0000101101000101 (0b45), 0110011001011011 (665b),  336   325
    
Frame 2,  745(P_L0_L0_16x8),    0110011001011011 (665b), 1010001010010000 (a290),  272   284
    
Frame 2,  746(P_8x8),           1010001010010000 (a290), 0010010000111101 (243d),  464   463
    
....

  • FFmpeg how to extract time fragments of exact duration at set intervals ?

    22 mars 2017, par Hugo Cox

    I have a video file, I know how to extract segments with ffmpeg and setting the keyframes to do so exact.

    However, I would like to extract a segment of a certain duration, say 1 minute, then wait 50 seconds, again segment 1 minute, wait 50 seconds, again segment 1 minute, etc. until the end of the video file.

    How can I accomplish this ?
    Is it possible to use a list.txt as cut input ?

  • Looking for video libraries for editing video on windows/ios/azure service [on hold]

    17 juillet 2015, par sanyam

    Which library would be a good bet in terms of ...
    1. Richness in features (I want to create a video from short clips and images with effects and filters). Think auto videos created from Google Photos.
    2. Extensibility - I would prefer using similar tech on IOS and Windows apps. Might have to offload some processing to a web service on Azure (windows or linux).
    3. Programmability - An API is preferred over command line as it gives more flexibility and better error handling.

    Given all these options, what is my best bet ? I’ve only looked at ffmpeg till now, is there a better alternative ?

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