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Autres articles (29)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • 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 (...)

Sur d’autres sites (2071)

  • Revision 8b175679be : Masking intra mode choice adaptively The commit changes to mask available intra

    11 octobre 2013, par Yaowu Xu

    Changed Paths :
     Modify /vp9/encoder/vp9_onyx_if.c


     Modify /vp9/encoder/vp9_onyx_int.h


     Modify /vp9/encoder/vp9_rdopt.c



    Masking intra mode choice adaptively

    The commit changes to mask available intra prediction modes for test
    based on prediction block size.

    With this patch, encoding time of CpuUsed 2 reduces from 10% to 20% for
    HD clips with a compression drop of 0.2%

    Change-Id : I65f320f1237c0f5ae3a355bf7caf447f55625455

  • ffmpeg : Crop webm file with circular .png mask [closed]

    26 mars 2021, par Beneos Battlemaps

    I tried everything for hours and can get it working by myself. I want to create animated Pen&Paper tokens for virtuale tabletops. I have a .webm video file with 720x720 pixel showing an animation of a render file created out of a png sequence via

    


    ffmpeg -framerate 24 -f image2 -i face.%04d.png -c:v libvpx-vp9 -pix_fmt yuva420p face1.mp4

    


    See here : https://webmshare.com/play/ZxZa0

    


    Now i want to overlay this .webm with an circle image as frame :

    


    overlay

    


    and crop the black part so its transparent in the end result as well as keeping the transparent area in the center for the video itself.

    


    So the endresult is from this :

    


    Face1

    


    to this :

    


    Face2

    


    Can you help me out with that ? If its easier i can split the steps, making first the alpha mask crop via png and adding the circle in it later.

    


    Beste regards in advance
-Ben

    


  • matroskaenc : write the channel mask for FLAC

    26 mai 2014, par Anton Khirnov
    matroskaenc : write the channel mask for FLAC
    • [DH] libavformat/Makefile
    • [DH] libavformat/matroskaenc.c

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