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  • MediaSPIP 0.1 Beta version

    25 April 2011, by

    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 February 2011, by

    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.

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 January 2010, by

    Les logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
    Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation; Oggz-tools : outils d’inspection de fichiers ogg; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores;
    Binaires complémentaires et facultatifs flvtool2 : extraction / (...)

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  • How can I convert the first frame of a video to an I-frame and the rest to P-frames with FFMPEG?

    18 June 2015, by Blankasaurus

    I’d like to try to do some datamoshing like this tutorial. But I’d like to be able to do it programatically, so instead of vdub and avidemux, I’d like to figure out how to do as many parts of this process as I can with ffmpeg and/or other command-line tools.

    The first problem I am having is that when I use the ffdshow codec rev 3556 with VDub it just outputs a broken video. I feel like I got close to getting what I want, which is frame 0 as an I-frame and all the rest as P-frames with the following command

    ffmpeg -i input.mp4 -force_key_frames 00:00:00.000 output.avi

    There are a couple of problems with this...

    1) I get B-frames too, which don’t work with that type of data-moshing

    2) There’s still I-frames every 10 or so frames

    I feel like the problem is that I need to use a certain codec to encode the video in and also that -force_key_frames probably just enforces the addition of extra keyframe(I-frames) but doesn’t prevent other I-frames from being created.

  • ffmpeg C API (libswscale): Scale a frame into an output frame with given width/height preserving aspect ratio, fill out the rest with transparency

    12 June 2015, by nik4emniy

    Note: I need to use ffmpeg’s C API in my project.
    Input: video(let’s say,first frame)/image, output_width, output_height
    Output: PNG image with output_width/output_height.

    What I’ve done so far:

    a) decoded a frame from input into frame1

    b) sws_scale frame1 with needed context (output_width, output_height) into frame2

    c) initialized AVCodec CODEC_ID_PNG

    d) encoded frame2 into initialized AVPacket

    e) wrote AVPacket’s data into file

    So I have a working cycle that produces a PNG image, but it doesn’t save the aspect ratio (obviously).
    What I want to achieve is do the same thing preserving aspect ratio (which would change the frame2’s width||height), but then "centring" that image and filling out the "empty" parts with tranparent layer in the final PNG.

    Does anyone have an idea on how this can be achieved?
    Again, I need to use C API, not command line.

  • FFMPEG - CONVERT VIDEO TO GREYSCALE EXCEPT ONE COLOR? LEAVE ONE COLOR, THE REST BLACK & WHITE? [closed]

    19 December 2023, by scm360

    I have been researching and cannot find anything on how to preserve just one color / color range; while converting a video to greyscale / black & white using FFMPEG. For example; all black and white, except the peoples Blue Jeans, etc.

    


    Anyone know how to do this in FFMPEG?

    


    Thanks in advance.

    


    I haven't actually found anything that has promise to achieve this. Of course I know how to convert everything to greyscale / black & white. But, not just leave the color / color range.

    


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