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  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • 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.

  • 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 (7465)

  • Webm - Video playback stops after seeking

    27 février 2017, par Ryan Vancity Gosling

    I am attempting to stream a Webm video file encoded from FFmpeg.

    However when I seek to a position which hasn’t been buffered, video playback stops.

    I’ve verified that the correct byte range has been downloaded.

    Any idea whats causing this ? Seeking worked flawlessly for mp4 files encoded in x264. Webm seems to be the problem. Might be a problem with the way video was encoded.

    ffmpeg -i input.mp4 -codec:v libvpx -quality best -b:v 4000k -qmin 10
    -qmax 42 -maxrate 4024k -bufsize 8048k -vf scale=-1:1080 -codec:a libvorbis -b:a 384k -movflags faststart out.webm

  • Merge commit ’46439e156219d27f059cf687743ba5aacf238b87’

    9 avril 2014, par Michael Niedermayer
    Merge commit ’46439e156219d27f059cf687743ba5aacf238b87’

    * commit ’46439e156219d27f059cf687743ba5aacf238b87’ :
    
  mp2 : match twolame default options
    

    Not merged as the change breaks fate, also forcing resampling to specific sample rate
    
reduces quality, and would be like rescaling every movie to 1080.
    

    Merged-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/mpegaudioenc_template.c

  • How to force avcodec to use unaligned frame data planes ?

    26 février 2015, par user3244284

    I have been searching high and low for an option to force avcodec to use unaligned memory for its AVFrame data.

    Depending on the pixel format, the horizontal planes of an AVFrame->data may be padded with extra data to be aligned to memory for performance.

    eg : a 1920 * 1080 video with 4 bytes per pixel will have 1920 * 4 = 7680 bytes per plane.

    With avcodec if you are decoding this video it will create 7808 bytes per plane.

    This adds 7808 - 7680 = 128 bytes of extra padding.

    For my purposes I would like to force avcodec to use unaligned data so I can copy an entire continuous chunk of frame data instead of copying and formatting smaller pieces one at a time to a continuous chunk.

    The following flag found in the headers :

    /* encoding support
    
   These flags can be passed in AVCodecContext.flags before initialization.
    
   Note: Not everything is supported yet.
    
*/
    

    
/**
    
 * Allow decoders to produce frames with data planes that are not aligned
    
 * to CPU requirements (e.g. due to cropping).
    
 */
    
#define CODEC_FLAG_UNALIGNED 0x0001

    Setting this AVCodecContext.flags to be CODEC_FLAG_UNALIGNED, the assumption is that the AVFrame->data is now unaligned, this is not the case.

    I’m not sure if I am looking at the right place or using this flag correctly.

    Regards,

    Curious George

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