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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

  • 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 (...)

  • Le plugin : Podcasts.

    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

Sur d’autres sites (7964)

  • How to change pitch and tempo together, reliably with ffmpeg

    12 novembre 2016, par jake

    I know how to change tempo with atempo, but the audio file becomes distorted a bit, and I can’t find a reliable way to change pitch. (say, increase tempo and pitch together 140%)

    Sox has a speed option, but truncates the volume AND isn’t as widely available as ffmpeg. mplayer has a speed option which works perfectly, but I can’t output without additional libraries.

    I seem to understand ffmpeg doesn’t have a way to change pitch (maybe it does recently ?) but is there a way to change frequency or some other flags to emulate changing pitch ? Looked quite far and can’t find a decent solution.

    Edit : asetrate:48k*1.4 (assuming originally 48k) doesn’t seem to work, still distortion and pitch doesn’t really change much.

    Edit2 : http://superuser.com/a/1076762 this answer sort of works, but the quality is so much lower than sox speed 1.4 option

  • How do I keep black areas black with ffmpeg ?

    20 avril 2017, par P. Dee

    When encoding GoPro videos with ffmpeg using

    ffmpeg -i Goprovideo.mp4 Goprovideo-out.mp4

    I noticed that the videos do not only get much smaller, but also in some cases do black areas lose intensity. So what was black is now grey. Not to an extreme, but slightly noticable.

    How do I keep black areas black with ffmpeg ?

  • How to change pitch and tempo together, reliably with ffmpeg [closed]

    5 février, par Ray C

    I know how to change tempo with atempo, but the audio file becomes distorted a bit, and I can't find a reliable way to change pitch. (say, increase tempo and pitch together 140%)

    



    Sox has a speed option, but truncates the volume AND isn't as widely available as ffmpeg. mplayer has a speed option which works perfectly, but I can't output without additional libraries.

    



    I seem to understand ffmpeg doesn't have a way to change pitch (maybe it does recently ?) but is there a way to change frequency or some other flags to emulate changing pitch ? Looked quite far and can't find a decent solution.

    



    Edit : asetrate:48k*1.4 (assuming originally 48k) doesn't seem to work, still distortion and pitch doesn't really change much.

    



    Edit2 : https://superuser.com/a/1076762 this answer sort of works, but the quality is so much lower than sox speed 1.4 option

    


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