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  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • 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 (8792)

  • avformat/mov : check color parameter type explicitly.

    24 mars 2015, par Jochen Strunk
    avformat/mov : check color parameter type explicitly.

    Fixes ticket #4387.
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    

    Note, Vittorio Giovara had submitted a very similar fix to me privately
    
a few hours before this, iam applying Jochens because it comes with a
    
commit message too and i had not yet applied Vittorios, but For sake
    
of credit, Vittorio independently solved this first
    • [DH] libavformat/mov.c

  • avcodec/mjpegdec : Support >8bpc color mjpeg

    11 septembre 2013, par Michael Niedermayer
    avcodec/mjpegdec : Support >8bpc color mjpeg

    Fixes Ticket2939
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/mjpegdec.c

  • What is the ideal image format extraction for YUV color space and lossless compression from mxf video format using ffmpeg

    15 février 2016, par DragonDance27

    I would like to be able to work on frames from an .mxf video file. The image format of the video is JPEG 2000, using a YUV color space with 4:2:2 subsampling and lossless compression.

    My intentions are to extract frames from this video using ffmpeg. Extracted frames would then be processed in Matlab (at the moment I’m interested in performing colorization).

    I want to extract the frames with as minimal data loss as possible and I would like to work in the YUV color space. I understand PNG involves a lossless process, but only involves the RGB color space - so not an option.

    I think I can extract jpeg2000 frames in the YUV color space, but I’m not sure if I’m losing data from the compression process. I attempted the following code in ffmpeg :

    ffmpeg -i video.mxf -r 1/5 out%03d.jp2

    ... however, the extracted jp2 files are unreadable in various software, including HiView which is a specialised JPEG 2000 software.

    Quesiton 1 : Is this jpeg 2000 extraction method lossless ? What am I doing wrong ?

    I also considered extracting the images in the tiff format where I can achieve the YUV and lossless requirements. I attempted the following code in ffmpeg :

    ffmpeg -i video.mxf -vcodec tiff f%10d.tif

    ... however, the extracted tiff files are unreadable in software such as paint, paint.net and windows photo viewer.

    Question 2 : Is this tiff extraction method correct ? What am I doing wrong ?

    Question 3 : What is an ideal image format that covers my YUV and lossless requirements ?

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