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  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

Sur d’autres sites (6864)

  • Revision 111946 : trailing space

    10 octobre 2018, par root — Log

    trailing space

  • How to get frames from HDR video in scRGB color space ?

    5 mars 2018, par Виталий Синявский

    I want to create a simple video player that will show HDR video on HDR TV. For example, this "LG Chess HDR" video. It is encoded with HEVC, its bit depth is 10 bit, pixel format is YUV420P10LE and it has metadata abount BT2020 color space and PQ transfer function.

    In this NVIDIA article I found the next :

    The display driver takes the scRGB back buffer, and converts it to the
    standard expected by the display presently connected. In general, this
    means converting the color space from sRGB primaries to BT. 2020
    primaries, scaling to an appropriate level, and encoding with a
    mechanism like PQ. Also, possibly performing conversions like RGB to
    YCC if that display connection requires it.

    It means that my player should render pixels in the scRGB color space (linear encoding, sRGB primaries, full range is -0.5 through just less than +7.5). So I need to get frames from the source video in this color space somehow, preferably in FP16 pixel format (half float, 16 bits per one color channel). I come to the following simple pipeline to render videos to HDR :

    source HDR video in BT2020 color space with applied PQ -> [some video library] -> 
    
-> video frames with colors in scRGB color space -> [my program] ->
    
-> rendered video on HDR TV with applied conversions by display driver

    I’m trying to use FFmpeg as this library and do not understand how to get frames from the source HDR video in scRGB color space.

    I use sws_scale FFmpeg method now to get frames and know about filters API. But I did not found any information and help about how to transparantly get frames in scRGB using these functionality without parsing metadata for all source videos and create custom video filters for them.

    Please, tell me what I can do to get frames in the scRGB color space using FFmpeg. Can someone tell other libraries with which I can do it ?

  • avcodec/extract_extradata : don't allocate more space than needed when removing NALUs...

    9 mars 2018, par James Almer
    avcodec/extract_extradata : don't allocate more space than needed when removing NALUs in h264/hevc

    Signed-off-by : James Almer <jamrial@gmail.com>
    • [DH] libavcodec/extract_extradata_bsf.c

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