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  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (8173)

  • ffmpeg is setting start_time to a negative value on output

    16 mai 2016, par Éric

    We’ve been using an old version of ffmpeg for a while and now we need to upgrade to a more recent version (e.g. 2.6) and we have issues with it while converting .mov to .mp4.

    For instance I have a .mov video file that has two streams, video and audio, both with start_time=0 and when I convert it using :

    ffmpeg -i my_file.mov my_file.mp4

    the output mp4 has an audio stream with start_time=-0.021333.

    The FORMAT section, as shown by ffprobe -show_format -show_streams my_file.mp4
    also has start_time=-0.021333

    The previous version of ffmpeg we were using didn’t have this issue...

    When we play the output mp4 file in a web browser using < video > it’s all good while playing but if we pause the video and seek here and there we notice that all the frames are off by 1. The first frame is duplicated and the last frame is missing !

    In other words :

    dom.currentTime = 0 shows the first frame
    dom.currentTime = 1/24 (fps is 24) shows the first frame again
    dom.currentTime = 2/24 shows the second frame instead of the third frame
    dom.currentTime = 3/24 shows the third frame instead of the fourth frame
    ...

    We believe this is caused by the field start_time=-0.021333

    This is a major issue for us...

    It’s repro on chrome and firefox but somehow safari is not having issues with this...

    After googling this we found that we’re not the only one with this issue but it’s not clear what the solution is.

    Someone suggested to use the "-c:a copy" arguments and it worked on some files but gave an error on some others :

    Could not write header for output file #0 (incorrect codec parameters ?) : Invalid argument

    So this doesn’t seem to be a robust solution...

    Any help would be appreciated.

  • h264 real time video streaming

    24 mars 2016, par Michal Gallovic

    If you have dynamically generated h264 frames on one end (server), how would you go about making a real time (low latency) video stream viewable in browser (client) ?

    In other words, what I’m trying to achieve is streaming graphically intensive c++ application from gpu server to browser.

    As a simple solution, I’m thinking of something like this :

    c++ app | ffmpeg | server | html5 client

    h264 frames created by application are sent to standard output, where ffmpeg is used to remux this stream into mp4 that is passed to server, which upon request can pass it to client.

    Is this a good approach ? Is that even possible to create a low latency 30fps video stream using this approach ?

  • FFmpeg - Writing a script to define fontcolor of each word in a text file ?

    1er mars 2019, par distro.obs

    I have a text file with a lot of word separated by newline character like this

    apple
    banana
    strawberry

    And I have a list of colors I want those word to appear in

    0xFF0000
    0xFFFF33
    0xFF0045

    Also I’m using command like this

    x=:'lte(t,10.99)*0+between(t,11,42.99)*10+between(t,43,643.99)*20+gte(t,644)*30':y='lte(t,10.99)*0+between(t,11,42.99)*10+between(t,43,643.99)*20+gte(t,644)*30'

    to move those words around.

    Is it possible to somehow script ffmpeg to color those words and also move them all in one command ?