Recherche avancée

Médias (91)

Autres articles (95)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (4907)

  • fate : add test for the life video source.

    25 février 2012, par Nicolas George

    fate : add test for the life video source.

  • How to optimize video to animated GIF conversion using PHP + shell commands

    15 mars 2012, par user1070798

    I have a web application that converts any video into an animated GIF. The app runs in PHP and the following steps are executed through php's shell_exec :

    1. Scale video to smaller dimensions, if they are large (ffmpeg -i $in -s 200x150 -an $out)
    2. Use ffmpeg to extract 1 jpeg every x seconds (ffmpeg -i $in -ss $ss -vframes 1 $out)

    3. Convert jpegs to animated GIF using imagick (convert -delay $delay -loop 0 $dir/* $out)

      aside - the reason I don't use the ffmpeg gif89a output is because the quality sucks.

    I want to be able to except any major image format, but the most common will probably be .flv (flash) and .avi/.mpg.

    My application runs fine, but I am a perfectionist and it needs to be faster for scalability.

    My web server has 16 cores and I would like to utilize them as much as possible, but .flv multi-threading appears to not be supported by ffmpeg, while .avi and some others are supported. Also, ffmpeg doesn't support multi-threading when outputting to jpegs.

    Does anyone know of any other programs that support multi-threading for .flv and others ? Are there any more efficient methods to create an animated GIF from video, while maintaining relatively decent quality (aka not the 100-color palette that ffmpeg supports) ?

    Also, if anyone knows which codecs might perform best for stages 1 and 2, particularly with flv, I'd love to know. I've done hours of testing, but there are just so many options I haven't come to any solid conclusions.

    ***Update : My online app is working well so far animated gif generator. I would still love to make it faster though, so if anyone has run into similar circumstances... let me know !

  • How to quantify and compare video quality

    24 mars 2015, par user940154

    I have a set of uncompressed videos in YUV format.

    I have obtained several derived copies in various formats and resolutions from these yuv files using FFmpeg transcoding. (YUVs ----> X Derived Copies)

    What I have also done is, transcode the yuv’s into same resolution AVIs, and now obtained the same set of derived (transcoded) videos treating the AVIs as master. (AVIs ----> X Derived Copies)

    Now I wish to compare the quality of transcoded videos, when derived from AVIs to those derived from YUVs.

    Is there any way for me to do this using FFmpeg. How ? If not, can you please suggest some good open source software to do this.

    Thanks

Navigation