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  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • 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" (...)

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  • Split a movie so that each GIF is under a certain file size

    9 novembre 2014, par Terence Eden

    Problem

    I want to convert a long movie into a series on animated GIFs.

    Each GIF needs to be <5MB.

    Is there any way to determine how large a GIF will be while it is being encoded ?

    Progress So Far

    I can split the movie into individual frames :

    ffmpeg -i movie.ogv -r 25 frameTemp.%05d.gif

    I can then use convert from ImageMagick to create GIFs. However, I can’t find a way to determine the likely file size before running the command.

    Alternatively, I can split the movie into chunks :

    ffmpeg -i movie.ogv -vcodec copy -ss 00:00:00 -t 00:20:00 output1.ogv

    But I’ve no way of knowing if, when I convert the file to a GIF it will be under 5MB.

    A 10 second scene with a lot of action may be over 5MB (bad !) and a static scene could be under 5MB (not a problem, but not very efficient).

    Ideas

    I think that what I want to do is convert the entire movie into a GIF, then find a way to split it by file size.

    Looking at ImageMagick, I can split a GIF into frames, but I don’t see a way to split it into animated GIFs of a certain size / length.

    So, is this possible ?

  • Default Pixel Format For FFMPEG For Encoding an Image Stack To Movie

    11 septembre 2017, par JMevorach

    If one was converting a stack of images to a .mp4 with FFMPEG using libx264 to encode h.264 video and one didn’t specify a pixel format in the call to FFMPEG is the default pixel format YUVJ420 ? I’ve been doing some experiments and have been getting results identical to if I specified YUVJ420 for my format versus if I specify no format.

  • How can I fill skipped video frames of a movie with duplicated frames using ffmpeg ?

    28 août 2017, par Aviv Sharon

    I have an avi movie that contains some skipped frames (can be easily seen with virtual dub, that it duplicates them to the previous frame).
    My question is how can I use ffmpeg tool to convert a movie to be the same, just to fill the skipped frames with the previous ones, without changing the compression, using the very same source frames.
    I know there is a "-vsync cfr" option that works when re-encoding ("-vcodec [some codec]"), and there is "-vcodec copy", which maintains the codec and quality. However, these 2 ("-vsync cfr -vcodec copy") are not working together. In such case, the output video is the same as the input video (bit-exact).

    Any clue how can I do it ? Thanks

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