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Autres articles (62)

  • 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 (...)

  • Qualité du média après traitement

    21 juin 2013, par

    Le bon réglage du logiciel qui traite les média est important pour un équilibre entre les partis ( bande passante de l’hébergeur, qualité du média pour le rédacteur et le visiteur, accessibilité pour le visiteur ). Comment régler la qualité de son média ?
    Plus la qualité du média est importante, plus la bande passante sera utilisée. Le visiteur avec une connexion internet à petit débit devra attendre plus longtemps. Inversement plus, la qualité du média est pauvre et donc le média devient dégradé voire (...)

Sur d’autres sites (7468)

  • Evolution #3253 : Url par numéro d’articles : les proposer sans passer par 301

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    Tu veux dire un module d’URL qui definirait comme URL propre l’id de l’article pour les articles ?

  • A random pixel on a keyframe. (ffmpeg)

    5 juin 2013, par Chris Russo

    Hello folks of SO !

    We're trying to do some very small and simple code in PHP to generate a variation of a video, using always the same file.

    The script would have to make a small pixel mark, on random or specific frame of the video file, and this would have to be streamed in real time.

    Here's some pseudo code to explain my idea :

    $frame = $_GET[frame];
    
$videofile = 'video.avi';
    

    
make_random_red_pixel_mark($videofile, $frame);

    Does anyone know if this is possible using ffmpeg ? As well, it is of extreamly importance for us, to execute this procedure as fast as possible.

    A solution that would imply reprocessing the whole video, won't be useful for our purposes. It should be something like a closed caption, or a quick image / overlay filter that could be applied without an entire video reprocessing. As well, we can't put the overlay using Javascript nor any HTML approach, since the actual manipulation has to be on the video file itself.

    The quality, and framerate of the original video, should be kept intact. Perhaps some other PHP module or software that could be execute from PHP using an exec() ?

    Any recommendation ?

    Thanks in advance !!
    Chris C. Russo

    More information :

    1) It's possible for us to apply this procedure on any frame we want to, so we could use a "keyframe" in order to avoid the decoding and reencoding of an entire GOP.

    2) As previously stated, the video stream would have to flow in real time.

  • A random pixel on a frame. (ffmpeg)

    4 juin 2013, par Chris Russo

    Hello folks of SO !

    We're trying to do some very small and simple code in PHP to generate a variation of a video, using always the same file.

    The script would have to make a small pixel mark, on random or specific frame of the video file, and this would have to be streamed in real time.

    Here's some pseudo code to explain my idea :

    $frame = $_GET[frame];
    
$videofile = 'video.avi';
    

    
make_random_red_pixel_mark($videofile, $frame);

    Does anyone know if this is possible using ffmpeg ? As well, it is of extreamly importance for us, to execute this procedure as fast as possible.

    A solution that would imply reprocessing the whole video, won't be useful for our purposes. It should be something like a closed caption, or a quick image / overlay filter that could be applied without an entire video reprocessing. As well, we can't put the overlay using Javascript nor any HTML approach, since the actual manipulation has to be on the video file itself.

    The quality, and framerate of the original video, should be kept intact. Perhaps some other PHP module or software that could be execute from PHP using an exec() ?

    Any recommendation ?

    Thanks in advance !!
    Chris C. Russo

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