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  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • 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 (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

Sur d’autres sites (7863)

  • vulkan_video : add utilities for H264 level/profile mapping

    30 août 2024, par Lynne
    vulkan_video : add utilities for H264 level/profile mapping
    • [DH] libavcodec/vulkan_video.c
    • [DH] libavcodec/vulkan_video.h

  • avcodec/libfdk-aacdec : set keyframe flag and profile in output frames

    17 novembre 2024, par James Almer
    avcodec/libfdk-aacdec : set keyframe flag and profile in output frames

    Don't depend on the generic code setting this.
    
This is in preparation for a following change.
    

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

  • aacenc : remove support for AAC LTP profile

    8 février, par Lynne
    aacenc : remove support for AAC LTP profile

    The LTP profile of AAC is... terrible.
    
It was an early 90's attempt at bridging the gap between speech
    
codecs and general purpose codecs. It did so by trying to exploit the fact
    
that most speech patterns are regular.
    

    Unfortunately, it went about it the same way as AAC Main, by taking
    
the previous frame's samples, modifying them through an LPC filter,
    
transforming them back using a forward MDCT, putting the output
    
coefficients back into the current frame, and using delta coding.
    
But once again, they ignored basic mathematics and MDCT leakage.
    
Thankfully, because AAC LTP is meant to operate at very low bitrates,
    
the extreme quantization results in most leakage being irrelevant.
    

    Unfortunately, the result is that the output sounds pretty much
    
terrible regardless of whether LTP is enabled or not.
    

    This was the first attempt at trying to couple speech coding into AAC.
    
No, the second attempt did not succeed either.
    
Nnnneither did the third. Or fourth.
    

    For the fifth one, they literally just jammed a speech codec into AAC
    
with USAC once they saw Opus do it.
    

    Just drop support for encoding AAC LTP. It was always experimental
    
to begin with.
    • [DH] libavcodec/Makefile
    • [DH] libavcodec/aaccoder.c
    • [DH] libavcodec/aacenc.c
    • [DH] libavcodec/aacenc.h
    • [DH] libavcodec/aacenc_ltp.c
    • [DH] libavcodec/aacenc_ltp.h
    • [DH] libavcodec/aacenctab.h

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