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  • 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 (...)

  • MediaSPIP version 0.1 Beta

    16 avril 2011, par

    MediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • Amélioration de la version de base

    13 septembre 2013

    Jolie sélection multiple
    Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
    Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)

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  • Extract RGB values from a AVFrame (FFMPEG) in C++

    9 novembre 2011, par Extrakun

    I am currently trying to read in video frames by using FFMPEG. The format is PIX_FMT_RGB24 ; For each frame, the RGB values are all combined together in frame->data[0] (Where frame is of the type AVFrame).

    How do I extract the individual R, G and B values for each frame ? This is for processing the video. I would think it would work the same way as extracting the RGB values from a bitmap too. Thanks !

  • FFMPEG dropping frames due to color space mismatch

    14 mai 2021, par Ismir Egal

    I've got two png image sequences with 30 frames each i'm trying to blend together.
The problem is that some of the images are in the rgb24 color space while some are in rgba.
Blending the two 30-frame animations together causes it to loose frames - the output is only 26 frames long and the two individual strips out-of-synch.

    


    Command used :

    


    ffmpeg -i a_%04d.png -i b_%04d.png -c:v libvpx -crf 4 -b:v 20M -filter_complex "blend=average" ab.webm


    


    Result :

    


    Input #0, image2, from 'a_%04d.png':
Duration: 00:00:01.20, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, rgb24(pc), 1280x720 [SAR 2835:2835 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
Input #1, image2, from 'b_%04d.png':
Duration: 00:00:01.20, start: 0.000000, bitrate: N/A
Stream #1:0: Video: png, rgb24(pc), 1280x720 [SAR 2835:2835 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
[...]
Input stream #0:0 frame changed from size:1280x720 fmt:rgb24 to size:1280x720 fmt:rgba
Input stream #1:0 frame changed from size:1280x720 fmt:rgb24 to size:1280x720 fmt:rgba
Input stream #0:0 frame changed from size:1280x720 fmt:rgba to size:1280x720 fmt:rgb24
Input stream #1:0 frame changed from size:1280x720 fmt:rgba to size:1280x720 fmt:rgb24
Input stream #0:0 frame changed from size:1280x720 fmt:rgb24 to size:1280x720 fmt:rgba
Input stream #1:0 frame changed from size:1280x720 fmt:rgb24 to size:1280x720 fmt:rgba
Input stream #0:0 frame changed from size:1280x720 fmt:rgba to size:1280x720 fmt:rgb24
Input stream #1:0 frame changed from size:1280x720 fmt:rgba to size:1280x720 fmt:rgb24
frame=26 fps=13 q=0.0 Lsize=942kB time=00:00:01.12 bitrate=6886.5kbits/s
video:941kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.072036%


    


    Creating videos from the individual sequences does not create this problem, it only occurs when blending them together.
    
Any idea how i can solve this problem or convert both inputs to the rgb24 format first (if that would help) ?

    


  • ffmpeg conversion for an entire folder ? [closed]

    14 mai 2013, par user218314

    Ive been using :

    sudo ffmpeg -i Test.mkv -vcodec copy -acodec libfaac -ac 2 -ab 328k Test.mp4

    for individual files, but now I have many gigabytes of mkvs in a folder and would like to do a conversion for all at once and walk away from the computer. I appologize for my ignorance, but i am very new to linux and i dont understand how bash scripts are written or if it would even be necessary.

    also, i believe the command downsamples the DTS audio in the mkv to 2 channel AAC. am i correct that 328k is the highest bitrate I can convert to ?

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