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    Puis-je poster des contenus à partir d’une tablette Ipad ?
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  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 is the first MediaSPIP stable release.
    Its official release date is June 21, 2013 and is announced here.
    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 (...)

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 janvier 2010, par

    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 ;
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Sur d’autres sites (7093)

  • ffmpeg stream saving in python3

    25 novembre 2016, par b9703

    im trying to write a python script (for Windows OS) that can call on ffmpeg to recieve and save a live stream for later viewing. The initial call (subprocess.Popen(ARGS)) works as intended (start the stream saving) however i cant figure out how to programmatically end the process in a way that allows ffmpeg to finish its work. manually i can just press ’q’ or ’Ctrl-C’ and ffmpeg will produce a playable file.

    command = ['ffmpeg', '-i',
    
        url,
    
        '-acodec', 'copy',
    
        '-vcodec', 'copy',
    
        destination]
    

    
recording = Popen(command)

    i have tried using recording.terminate() which didn’t work. I’ve also tried (although i’m pretty sure i did it wrong) using recording.communicate(b’q’) to send a message to the process. All solutions i’ve found online have failed in the same way (file is unreadable). I really dont know much about the subprocces module or about the intricacies of processes so i may be missing something obvious. I just want to end the ffmpeg process in a non-abrupt manner.

  • Extract motion vectors from x265 (HEVC) encoded video with ffmpeg/libavcodec ?

    3 juillet, par John Allard

    I know that one can extract the motion vectors from an h264 encoded via by first setting the flag

    



    av_dict_set(&opts, "flags2", "+export_mvs", 0);


    



    then you can query the side-data for the motion vectors by doing this

    



    sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);


    



    When I looked online to see if you can do something similar with HEVC encoded videos, I wasn't able to find any information. All I found was this by the definition of "AV_FRAME_DATA_MOTION_VECTORS"

    



    


    Motion vectors exported by some codecs (on demand through the
 export_mvs flag set in the libavcodec AVCodecContext flags2 option).

    
 


    The data is the AVMotionVector struct defined in
 libavutil/motion_vector.h.

    


    



    but there was no information on exactly which codecs export this motion vector information. How would I go about finding this out ?

    


  • Extract motion vectors from x265 (HVEC) encoded video with ffmepg/libavcodec ?

    16 novembre 2017, par John Allard

    I know that one can extract the motion vectors from an h264 encoded via by first setting the flag

    av_dict_set(&opts, "flags2", "+export_mvs", 0);

    then you can query the side-data for the motion vectors by doing this

    sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);

    When I looked online to see if you can do something similar with HVEC encoded videos, I wasn’t able to find any information. All I found was this by the definition of "AV_FRAME_DATA_MOTION_VECTORS"

    Motion vectors exported by some codecs (on demand through the
    export_mvs flag set in the libavcodec AVCodecContext flags2 option).

    The data is the AVMotionVector struct defined in
    libavutil/motion_vector.h.

    but there was no information on exactly which codecs export this motion vector information. How would I go about finding this out ?

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