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  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • 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 (...)

  • 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 (15354)

  • How is video decoding corruption debugged ?

    20 novembre 2013, par TopGunCoder

    I just started working for a new company and my new role demands that I help debug the video corruption that they are receiving through decoding frames. As much as I intend on digging down deep into the code and looking into the specifics of my problem, it made me think about video debugging in general.

    Since handling videos is very new to me, the whole process seems pretty complex and it seems there are a lot of places for corruption to present itself. The way I see it there is at least three places where corruption could pop up (barring memory corruption from the machine) :

    • Transporting the data before it is decoded
    • decoding implementation that perpetuates corruption once it is encountered, or is all together incorrect (Which seems to be my problem)
    • Transportation to the monitor(which seems unlikely but possible)

    So what i'm really curious about is if/how people debug their video streams to determine the location of any potential corruption they are encountering. I'm sure there is no sure fire method but I am curious to see what problems are even possible and how they can be identified and triaged.

    P.S. - I'm not sure of the differences between different decoding methods but, if this question seems too vague maybe it helps to mention I am using ffmpeg and avcodec_decode_video2 for the decoding.

  • How is video decoding corruption be debugged ?

    17 septembre 2013, par TopGunCoder

    I just started working for a new company and my new role demands that I help debug the video corruption that they are receiving through decoding frames. As much as I intend on digging down deep into the code and looking into the specifics of my problem, it made me think about video debugging in general.

    Since handling videos is very new to me, the whole process seems pretty complex and it seems there are a lot of places for corruption to present itself. The way I see it there is at least three places where corruption could pop up (barring memory corruption from the machine) :

    • Transporting the data before it is decoded
    • decoding implementation that perpetuates corruption once it is encountered, or is all together incorrect (Which seems to be my problem)
    • Transportation to the monitor(which seems unlikely but possible)

    So what i'm really curious about is if/how people debug their video streams to determine the location of any potential corruption they are encountering. I'm sure there is no sure fire method but I am curious to see what problems are even possible and how they can be identified and triaged.

    P.S. - I'm not sure of the differences between different decoding methods but, if this question seems too vague maybe it helps to mention I am using ffmpeg and avcodec_decode_video2 for the decoding.

  • avcodec/aacsbr_template : Remove pointless runtime initialization

    27 décembre 2020, par Andreas Rheinhardt
    avcodec/aacsbr_template : Remove pointless runtime initialization

    The sbr_qmf_window_us array is basically symmetric around its middle
    
element and therefore the latter half is currently initialized from the
    
first half at runtime. Yet because the first half is initialized, the
    
array can't be placed in .bss at all, so that one gains nothing from not
    
already initializing the whole array statically. Therefore this commit
    
does exactly this.
    

    (There are two exceptions to the symmetry : Elements 384 and 512 are the
    
negations of their mirror element ; for the fixed-point decoder, Q31(-x)
    
does not equal -Q31(x). In order to keep the array exactly the same, the
    
latter form has been used for these two elements.)
    

    Reviewed-by : Lynne <dev@lynne.ee>
    
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
    • [DH] libavcodec/aacsbr_template.c
    • [DH] libavcodec/aacsbrdata.h

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