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Autres articles (62)

  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

Sur d’autres sites (7110)

  • Android ffmpeg save and append h264 streamed videos

    8 octobre 2012, par Stefan Alexandru

    I need to save a video file generated by two video streams coming from two different sources. I'm using rtsp over tcp/ip, and the videos are encoded with h264.
    I need to first record the video from the first source and than continue with the second source.
    So what I tried was to declare two AVFormatContext instances, initialize both with avformat_open_input(&context, "rtsp://......",NULL,&options)
    and then read frames with av_read_frame(context,&packet)
    and write them in the video file av_write_frame(oc,&packet);
    It works fine saving the video from the first source, but if by example I saved y frames from the first context, when I try reading and saving the frames from the second context in the same file, for the first y frames I am tring to save, av_write_frame(oc,&packet2);
    would retun -22    , and would not add the frame to the file.

    I think the problem is that the context variable remembers how many frames were read, and it gives every read packet an identification number, to make sure it isn't written twice. But when I'm using a new context those identification numbers reset, the AVOutputFormat or the AVFormatContext also retain the id of the package they are expecting to receive, and would not write anything until they receive a package with that id.
    Now I'm wondering how could I solve this inconvenience. I can't find any setter for that id, or any way to reuse the same context. I thought to modify the ffmpeg sources but they are pretty complex and I couldn't find what I was looking for.
    An alternative would be to save the two video in two different files but, I don't know how to append them afterwards, as ffmpeg can only append videos encoded with mpeg and rencoding the video isn't really an option, as it will take to much time. Also I couldn't find any other functional way to append two mp4 videos encoded with h264.

    I'll be happy to hear any kind of usable ideea to this problem.

  • How to display image for particular time in a video using ffmpeg

    18 juin 2013, par Pratik Bhingardeve

    I am trying to created a video from the sequence of images. But i have to display each image with different numbers of seconds. How to do this with FFMPEG.

    Thanks in advance.

  • Revision a766d8918e : Cleanup inside vp9_reconinter.c. Using block width and block height instead of

    8 août 2013, par Dmitry Kovalev

    Changed Paths :
     Modify /vp9/common/vp9_reconinter.c



    Cleanup inside vp9_reconinter.c.

    Using block width and block height instead of their logarithms. Using
    SUBPEL_BITS and SUBPEL_SHIFTS constants instead of magic numbers.

    Change-Id : I4e10e93c907c8a5e1cb27dfe74d1fcdcc4995448

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