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Médias (91)

Autres articles (24)

  • Soumettre améliorations et plugins supplémentaires

    10 avril 2011

    Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
    Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (6432)

  • How to fix Media Source Extension error : Initialization segment misses expected aac track

    10 janvier 2019, par neoflash

    I have captured my Tello drone camera footage using the following :

    ffmpeg -i udp://0.0.0.0:11111 -c:a copy -c:v copy -probesize 32 -reset_timestamps 1 -movflags frag_keyframe+empty_moov+default_base_moof output.mp4

    I am using the MediaSource and SourceBuffer API to play the video in a element in the browser. I have done this successfully with a webm format video, so I know that my transport pipeline is fine.

    When looking at the media-internals log in the Chrome browser, I noticed the following error :

    Initialization segment misses expected aac track.

    How can I fix this and get the video to play ?

  • FFMPEG : Youtube streaming quality and speed issues

    25 février 2020, par Alex Paramonov

    I am trying to make a reliable stream from my Icecast/Shoutcast servers to Youtube live. The command that I use is :

    ffmpeg -v verbose -framerate 30 -loop 1 -i /var/image.jpg -re -i http://127.0.0.1:4700/radio -c:v libx264 -preset ultrafast -b:v 2250k -maxrate 6000k -bufsize 6000k -c:a copy -ab 128k -s 1920x1080 -framerate 30 -g 60 -keyint_min 60 -f flv  rtmp://a.rtmp.youtube.com/live2/xxx

    As you can see I am using recommended bitrate for Youtube, insert keyframes every 2 seconds and streaming at 30 frames per second.
    The stream is working but after running for some time two thing are happening :

    1. FFMPEG speed falls from 1x to something like 0.998x
    2. Youtube starts complaining that video stream speed is slow, markes the quality as bad and sometimes video starts buffering.

    Why is this happening ? CPU load is normal, connectivity is ok (the stream is running on a 1Gg/s dedicated server).

    Since in my example above I am streaming a single image as a logo of the stream I also tried to generate a short 30 seconds video with that image and broadcast that video instead of an image, but that did not help as well.

    The command I used for conversion :

    ffmpeg -framerate 30 -loop 1 -i /var/image.jpg -c:v libx264 -preset ultrafast -tune stillimage  -b:v 2250k -minrate 2250k -maxrate 6000k -bufsize 6000k -framerate 30 -g 60 -keyint_min 60 -t 30 out4.mp4

    And broadcast with

    ffmpeg -stream_loop -1 -i out4.mp4  -re -i http://127.0.0.1:4700/radio -c:v copy -c:a copy  -framerate 30 -g 60 -keyint_min 60 -f flv  rtmp://a.rtmp.youtube.com/live2/xxx

    ffmpeg version is 4.1.1

  • Revision 9d67495f72 : Optimize 32x32 2D inverse DCT for speed-up This commit exploits the sparsity of

    1er août 2013, par Jingning Han

    Changed Paths :
     Modify /vp9/common/x86/vp9_idct_intrin_sse2.c



    Optimize 32x32 2D inverse DCT for speed-up

    This commit exploits the sparsity of quantized coefficient matrix.
    It detects each 32x8 array and skip the corresponding inverse
    transformation if all entries are zero.

    For ped1080p at 8000 kbps, this on average reduces the runtime of
    32x32 inverse 2D-DCT SSE2 function from 6256 cycles -> 5200
    cycles. It makes the overall encoding process about 2% faster at
    speed 0. The speed-up is more pronounceable for the decoding process.

    Change-Id : If20056c3566bd117642a76f8884c83e8bc8efbcf

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