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Autres articles (75)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • 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 (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

Sur d’autres sites (12205)

  • Revision 9f79259e54 : adapt the adjustment limit for rate correction factor in RTC mode Rate correcti

    13 novembre 2014, par Yaowu Xu

    Changed Paths :
     Modify /vp9/encoder/vp9_ratectrl.c



    adapt the adjustment limit for rate correction factor in RTC mode

    Rate correction factor is used to correct the estimated rate for any
    given quantizer, and feeds into rate control for quantizer selection.
    We make use of the actual bits used to calculate this rate correction
    factor with an adjustment limit to prevent over-adjustment.

    This commit adapts the adjustment limit to the difference between the
    estimated bits and the actual bits, allows the adjustment limit to vary
    between 0.125 (when estimate is close to actual) and 0.625 (when there
    is >10X factor off between estimated and actual bits). By doing this,
    the commit appears to have largely corrected two observed issues :
    1. Adjustment is too slow when the actual bits used is way off from
    estimate due to the small adjustment limit.
    2. Extreme oscillating quantizer choices due to the feedback loop.

    Change-Id : I4ee148d2c9d26d173b6c48011313ddb07ce2d7d6

  • How to use libvlc for low-frame-rate rtsp stream decoding

    11 mai 2017, par user1547688

    I am using libvlc for RTSP h.264 bitstream decoding and display in PC. For the best experience (i.e. low latency), I uses the following options

    :file-caching=0
    
:tcp-caching=0
    
:rtsp-caching=0
    
:network-caching=0
    
:clock-jitter=0
    
:avcodec-fast

    With these parameters, the latency is acceptable in comparison to the open-source project "ONVIF device manager"(ODM) where FFMPEG is used for decoding.

    When RTSP server deliver low frame-rate RTSP stream, (1 frame/second). These configuration will freeze after displaying a few frames (3-5 frames).

    I have tried 2 different approaches

    1. Disable synchronization by

      :clock-synchro=0

    This will enable the decoding process to go on, however, an accumulated period of time lagging could be observed.

    1. Use network-cache

    My experiments shows that

    :network-caching=1200

    Will make decoding go smoothly, however, the latency is over 1-2 second in comparison to ODM.

    Is there a way to handle the low frame rate issue in libvlc without providing such big latency ?

  • gitignore : ignore object file temporaries

    10 octobre 2015, par Ganesh Ajjanagadde
    gitignore : ignore object file temporaries

    During a build, a lot of *.o.-hash files are created - had not noticed
    
this as they are usually dumped in tmpfs on Linux. However, they
    
sometimes are present during a long build in the project directory, making it
    
annoying to commit while the project is being built.
    

    These have been observed with Clang, -fsanitize-undefined on Arch Linux,
    
though other configurations may also generate such temporaries.
    

    The solution here is on lines with the Linux kernel’s .gitignore :
    
https://github.com/torvalds/linux/blob/master/.gitignore.
    

    Signed-off-by : Ganesh Ajjanagadde <gajjanagadde@gmail.com>
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] .gitignore

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