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Autres articles (109)

  • 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.

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Les sons

    15 mai 2013, par

Sur d’autres sites (11674)

  • Extract audio amplitude from video

    11 janvier 2012, par Andrew

    I need to process >200 videos by getting several snapshots from each one.
    Each snapshot will be taken if the volume is higher than 'x'.
    So I can make snapshots with FFMPEG but I don't know how to extract the amplitude graph.
    How can I get an array with the audio volume of each frame ?

  • What are the APIs for hardware accelerated video decoding in phones ?

    11 janvier 2012, par cloudraven

    I have seen many smartphones coming with hardware accelerated video decoding supporting mpeg2 and h264, but unlike in desktop and laptop systems, it is not clear to me how to interact with the hardware acceleration.
    For desktops/laptops there is DXVA, VDPAU and OpenMax.
    Is any of those supported in Mobile phones ? I think OpenMax is, but I am not sure of how widely supported it is.

    Is anyone familiar with what is usually used to write hardware accelerated media players and decoders for platforms like Snapdragon, Tegra 2 or Omap 4 running Android or Windows Phone ?
    I know that ffmpeg can be compiled for arm and I wonder what kind of hardware video acceleration it supports on that platform.

  • Xuggler encoding images to video FPS issue

    1er novembre 2011, par Chris Robinson

    I've been experimenting with encoding a video from a series of images using CaptureScreenToFile.java as a basis. My output is to be an MP4 file. From 26 images, using the code as is (taking the images from a directory instead of from a screen capture obviously), the encoding video is 11s. However, if I change the framerate variable to :

    frameRate = IRational.make(1, 24);

    which I believe should result in a video of 24FPS. It does not however, (no change from the original video in fact). I experimented with changing the timeStamp variable in encodeImage() method to :

    long timeStamp = (firstTimeStamp*1000)+(i*40);

    where 0 < i < 25 to see if that would help but it doesn't. Can anyone explain to me how to encode a directory of images to a video with a framerate that I can set ?

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