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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 (...)

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

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  • Generating movie from python without saving individual frames to files

    31 juillet 2022, par Paul

    I would like to create an h264 or divx movie from frames that I generate in a python script in matplotlib. There are about 100k frames in this movie.

    



    In examples on the web [eg. 1], I have only seen the method of saving each frame as a png and then running mencoder or ffmpeg on these files. In my case, saving each frame is impractical. Is there a way to take a plot generated from matplotlib and pipe it directly to ffmpeg, generating no intermediate files ?

    



    Programming with ffmpeg's C-api is too difficult for me [eg. 2]. Also, I need an encoding that has good compression such as x264 as the movie file will otherwise be too large for a subsequent step. So it would be great to stick with mencoder/ffmpeg/x264.

    



    Is there something that can be done with pipes [3] ?

    



    [1] http://matplotlib.sourceforge.net/examples/animation/movie_demo.html

    



    [2] How does one encode a series of images into H264 using the x264 C API ?

    



    [3] http://www.ffmpeg.org/ffmpeg-doc.html#SEC41

    


  • Using ffprobe/ffmpeg to extract individual frames and types in encode order

    24 janvier 2018, par Hélder

    I am able to extract keyframes using ffmpeg. Something like this that I have been using :

    ffmpeg -i input.mp4 -vf "select='eq(pict_type\,I)" -vsync vfr -qscale:v 2 I-thumbnails-%02d.png -vf "select='eq(pict_type\,B)" -vsync vfr -qscale:v 2 B-thumbnails-%02d.png -vf "select='eq(pict_type\,P)" -vsync vfr -qscale:v 2 P-thumbnails-%02d.png

    Now the issue is, I would like these extracted frames to be in encode order, if possible, the way they are extracted should have a timestamp or any way to know that they start in a certain sequence, example, from start to end :

    IBBBIPPB......BI

    but in a way that I can sort the frames in the encode sequence.

    I want to use this to load in python to extract motion vectors but they should all follow the encoding sequence. Any help ?

    Edit :
    Changed playback to encode sequence(or order).

  • Using ffprobe/ffmpeg to extract individual frames and types in playback sequence

    24 janvier 2018, par Hélder

    I am able to extract keyframes using ffmpeg. Something like this that I have been using :

    ffmpeg -i input.mp4 -vf "select='eq(pict_type\,I)" -vsync vfr -qscale:v 2 I-thumbnails-%02d.png -vf "select='eq(pict_type\,B)" -vsync vfr -qscale:v 2 B-thumbnails-%02d.png -vf "select='eq(pict_type\,P)" -vsync vfr -qscale:v 2 P-thumbnails-%02d.png

    Now the issue is, I would like these extracted frames to be in playback sequence, if possible, the way they are extracted should have a timestamp or any way to know that they start in a certain sequence, example, from start to end :

    IBBBIPPB......BI

    but in a way that I can sort the frames in the playback sequence.

    I want to use this to load in python to extract motion vectors but they should all follow certain playback sequence. Any help ?

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