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Médias (1)

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Autres articles (92)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • 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 (...)

Sur d’autres sites (6157)

  • avcodec/g723_1dec : Fix LCG type

    14 mai 2017, par Michael Niedermayer
    avcodec/g723_1dec : Fix LCG type

    Fixes : 1567/clusterfuzz-testcase-minimized-5693653555085312
    

    Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/g723_1dec.c

  • How can i insert 10 seconds of silent audio(null audio without images or video or black video) into video repeat every 15 seconds with ffmpeg ?

    1er septembre 2018, par Adam Estel

    I have a clip video.mp4 . How can i insert 10 seconds of only silent audio into this clip repeat every 15 seconds until the end of this clip with ffmpeg ?
    I know anullsrc is an audio so i can’t use overlay filter. I research on google for a while but the only option i have is gte(mod(t,15),10)).

    Thank you.

  • Can't overlay a WebM transpartent video on top of a MP4 using ffmpeg [closed]

    27 octobre 2020, par Hervé

    I have been struggling for hours trying to overlay a WebM transpartent video on top of a MP4 using ffmpeg. The two videos have the same duration. It should therefore be easy but I am getting desperate.

    &#xA;

    "c:\Program Files\ffmpeg\bin\ffmpeg.exe" ^&#xA;-i drone.mp4 ^&#xA;-i trans.webm -pix_fmt yuv444p  ^&#xA;-filter_complex "[1:v]format=rgba,colorchannelmixer=aa=0.5[trans];[0:v][trans]overlay=10:10" ^&#xA;out.mp4&#xA;

    &#xA;

    I tried MANY MANY different options, formats, but kept obtaining the same outcome : ffmpeg simply ignores the alpha channel of the trans.webm file and considers its background as black. I used the colorchannelmixer=aa=0.5 and the 10:10 offset to actually see the problem. My goal is really to keep the original subtle alpha channel of trans.webm, NOT to set the black color to transparent.

    &#xA;

    Some information about the two files :

    &#xA;

    drone.mp4

    &#xA;

        Metadata:&#xA;    creation_time   : 2020-10-27T10:18:38.000000Z&#xA;    handler_name    : VideoHandler&#xA;    encoder         : h264&#xA;    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 191 kb/s (default)&#xA;    Metadata:&#xA;    creation_time   : 2020-10-27T10:18:38.000000Z&#xA;    handler_name    : SoundHandler&#xA;

    &#xA;

    trans.webm

    &#xA;

        Input #0, matroska,webm, from &#x27;trans.webm&#x27;:&#xA;    Metadata:&#xA;    ENCODER         : Lavf58.51.100&#xA;    Duration: 00:00:27.00, start: 0.000000, bitrate: 28 kb/s&#xA;    Stream #0:0: Video: vp9 (Profile 0), yuv420p(tv), 1920x1080, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)&#xA;    Metadata:&#xA;    alpha_mode      : 1&#xA;    ENCODER         : Lavc58.100.100 libvpx-vp9&#xA;    DURATION        : 00:00:27.000000000&#xA;

    &#xA;

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