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Autres articles (40)

  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • 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 (...)

  • 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 (...)

Sur d’autres sites (5463)

  • Revert "avcodec/decode : copy the output parameters from the last bsf in the chain...

    12 septembre 2018, par James Almer
    Revert "avcodec/decode : copy the output parameters from the last bsf in the chain back to the AVCodecContext"

    This reverts commit f631c328e680a3dd491936b92f69970c20cdcfc7.
    

    The avcodec_parameters_to_context() call was freeing and reallocating
    
AVCodecContext->extradata, essentially taking ownership of it, which according
    
to the doxy is user owned. This is an API break and has produced crashes in
    
some library users like Firefox[1].
    

    Revert until a better solution is found to internally propagate the filtered
    
extradata back into the decoder context, or a decision is made to change the
    
API.
    

    [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1486080
    

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

  • How to output raw frequency (fft) data using ffmpeg / libavfilter

    12 janvier 2020, par Jeroen

    I’m trying to write libavfilter bindings to convert an arbitrary audio file into a raw frequency (spectrum) data to do subsequent audio analysis. Is there anything built-in ffmpeg or libavfilter to output binary frequency data, rather than a proper audio/video file ?

    FFmpeg has a few built-in filters that perform an FFT such as afftfilt and showfreqs, however these filters always convert output back to video or audio. What I need is something like the afftfilt filter, but which dumps the raw FFT data, rather than recode it back to PCM. 

  • how to put a raw char * to AVPacket

    29 août 2014, par Godspped

    I have a compressed image stored in a char * and I want to put it back to an AVPacket so that I can put it into a ffmpeg decoder. Can someone show how to do this ? Any sample or tutorial would be greatly appreciated.

    Thanks in advance

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