Recherche avancée

Médias (1)

Mot : - Tags -/university

Autres articles (80)

  • Demande de création d’un canal

    12 mars 2010, par

    En fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
    Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...)

  • Gestion de la ferme

    2 mars 2010, par

    La ferme est gérée dans son ensemble par des "super admins".
    Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
    Dans un premier temps il utilise le plugin "Gestion de mutualisation"

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (10846)

  • What generally dictates the density of packets when converting with ffmpeg ?

    3 juin 2013, par Ardoramor

    I am changing containers of a media file both with ffmpeg binary and programmatically (ffmpeg libs and C program). The issue I run into is that the packing and density of the two outputs differs.

    Both files contain 429 audio and 289 video packets. The conversion happens from mp4 to mpeg2ts. No packet gets re-encodec (H264 and AAC).

    Dumping packets from mp4, I see that the distribution as

    [44 audio pkts]
    
[31 video pkts]
    
[44 audio pkts]
    
[31 video pkts]
    
...

    ffmpeg binary converts mp4 into correctly playable file with the following distribution

    [5 video]
    
[9 audio]
    
[7 video]
    
[9 audio]
    
[7 video]
    
...

    I programmatic conversion produces a playable file but with audio stream playing too fast

    [4 audio]
    
[1 video]
    
[3 audio]
    
[1 video]
    
[3 audio]
    
...
    
[3 audio]
    
[144 video] <- because audio packets were not distributed properly, they are exhausted and only video packets are output at the end.

    What I would like to know is what generally dictates such distributions.

  • ffmpeg single output container with 4 audio channel to AWS IVS

    28 juillet 2021, par Yusufu

    Trying to send 1 video and 4 different audios to AWS IVS in single container. Which container or muxer should I use ?
FLV doesn't support multi audio, matroska doesn't support rtmp I guess link.
3GP and mp4 containers doesn't give me error but neither video showing on IVS

    


    For simple try I am using this command.

    


    ffmpeg -re -stream_loop -1 -i sample.mkv -r 30 -c:v libx264 -pix_fmt yuv420p -profile:v main -preset veryfast -x264opts "nal-hrd=cbr:no-scenecut" -minrate 3000 -maxrate 3000 -g 
60 -c:a aac -ac 2 -ar 44100 -vb 400k -maxrate 400k -minrate 400k -bufsize 800k -movflags frag_keyframe+empty_moov -f mp4 rtmps:someurls


    


    the above command doesn't include multi audio output so just trying to send except the flv format

    


  • How can I set a Clean Aperture on a QuickTime file in ffmpeg ? [closed]

    5 novembre 2024, par blackirishman

    I am using ffmpeg to convert files to QuickTime containers. I understand that certain QuickTime files requires clap atoms, ie "This is a mandatory extension for all uncompressed Y´CbCr data formats."

    


    https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html#//apple_ref/doc/uid/TP40000939-CH205-125850

    


    Is there a way to specify a clap atom when using ffmpeg to output a QuickTime file ? Otherwise would there be harm in adding a clap atom at the end of the file assuming that I updated any file length field ? Lastly, assuming that there is not doubt as to the proper viewable/usable pixel dimensions of my file, is a clap even necessary ?

    


Navigation