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Autres articles (26)

  • Déploiements possibles

    31 janvier 2010, par

    Deux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
    L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
    Version mono serveur
    La version mono serveur consiste à n’utiliser qu’une (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

Sur d’autres sites (6538)

  • Streaming a video to /dev/video0 using gstreamer and v4l2 shows a black screen [on hold]

    24 septembre 2019, par Lawliet

    I’ve been trying to use a video as a webcam for quite a while now. The command

    gst-launch-1.0 filesrc location=newflag.webm ! decodebin ! videoconvert ! v4l2sink device=/dev/video0

    Using this command, i’m able to watch the stream using VLC but Discord and Firefox display a black screen when using /dev/video0 as a webcam.

    I got it working using ffmpeg to stream the video in yuv420p so I suspect videoconvert converts the stream to YUY2 which is I guess not supported by Discord nor Firefox.

    Any idea on how to get this to work ?

  • ffmpeg generate from png sequence produces black video

    20 septembre 2019, par friendlygiraffe

    I am using ffmpeg to generate an MP4 from a png sequence using the following :

    ffmpeg -framerate 25 -pattern_type glob -i "*.png" -c:v libx264 -pix_fmt yuv420p -b:v 1M out.mp4

    But it outputs a black video, any advise on why ?

    The folder contains 2000 pngs which are 4520 × 2160 pixels

  • FFMPEG combining videos - returning video with black background ?

    8 juin 2016, par Julia

    I’m trying to combine two .mp4 files so they play next to each other in one window. They are the same length (9 seconds), have the same number of frames, and the sources are both independently playable. Here’s what i’ve tried so far :

    ffmpeg -i highres_BH_140.mp4 -i BH_140.mp4 -filter_complex "[0:v:0]pad=iw*2:ih[bg]; [bg][1:v:0]overlay=w" -b 16M combined.mp4

    and

    ffmpeg -i BH_140.mp4 -i highres_BH_140.mp4 -filter_complex vstack stacked.mp4

    This just creates a video with a black background, although it does play for 9 seconds. One video is a higher resolution, could this be a problem ? Or is it the fact that they’re .mp4 files and not .mpg ?

    I’m still trying to understand ffmpeg’s syntax, so it’s possible I’m making a silly mistake somewhere.

    Thanks !

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