Recherche avancée

Médias (0)

Mot : - Tags -/albums

Aucun média correspondant à vos critères n’est disponible sur le site.

Autres articles (96)

  • 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 (...)

  • 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 (...)

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (6194)

  • ffmpeg overlay filter adds black background for PNG with transparency

    30 janvier 2019, par Pavel S.

    I’m trying to programmatically add PNG overlay over h264 video.

    Even though PNG image has alpha channel, after I apply filter, on a resulting video this image has black background instead of transparent one.
    Here’s the filter :

    "[in][in2]overlay=15:15[out]"

    I’m using openh264 to decode/encode video, so the pixel format of resulting video is YUV420P.
    I’ve tried to explicitly define format in filter :

    [in][in2]overlay=15:15,format=rgba,format=yuv420p[out];

    But no change.
    ffmpeg : 3.4 ;
    openh264 : Git (i.e. 1.9.0)

    Thanks in advance.

  • 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 ?

  • tile option in FFMPEG command result to black screenshot

    4 mars 2020, par sammax

    I am managing to create a screenshot using ffmpeg engine and it works fine when I am try to output one individual image

    ffmpeg -ss 01:05 -i input.mp4 -an -dn -sn -r 1 -vframes 1 -y -qscale 3 -vf "scale=width:high"

    But when I try to create a multi-image (Thumbnail grid sheets) using tile option the output screenshot is empty black

    ffmpeg -ss 01:05 -i input.mp4 -an -dn -sn -r 1 -vframes 1 -y -qscale 3 -vf "select=not(mod(n\,3000)),scale=320:240,tile=4x3"

    and here is what I want to achieve image

Navigation