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  • 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.

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

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  • libswscale/aarch64 : add another hscale specialization

    13 août 2022, par Swinney, Jonathan
    libswscale/aarch64 : add another hscale specialization

    This specialization handles the case where filtersize is 4 mod 8, e.g.
    
12, 20, etc. Aarch64 was previously using the c function for this case.
    
This implementation speeds up that case significantly.
    

    hscale_8_to_15__fs_12_dstW_512_c : 6234.1
    
hscale_8_to_15__fs_12_dstW_512_neon : 1505.6
    

    Signed-off-by : Jonathan Swinney <jswinney@amazon.com>
    
Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libswscale/aarch64/hscale.S
    • [DH] libswscale/aarch64/swscale.c

  • Merging input Streams with nodejs/ffmpeg

    14 septembre 2020, par jAndy

    I'm creating a very basic and rudimentary Video-Web-Chat. On the client side, I'm going to use a simple getUserMedia API call to capture the webcam data and send video-data as data-blob to my server.

    &#xA;

    From There, I'm planning to either use the fluent-ffmpeg library or just spawn ffmpeg myself and pipe that raw data to ffmpeg, which in turn, does some magic and pushes that out as HLS stream to an Amazon AWS Service (for instance), which then gets actually displayed on a Web Browser for all participating people in the video chat.

    &#xA;

    So far, I think all of this should be fairly easy to implement, but I keep my head spinning around the question, how I can create a "combined" or "merged" frame and stream, so the output HLS data from my server to the distributing cloud service has only to be one combined data stream to receive.

    &#xA;

    If there are 3 people in that video chat, my server receives 3 data streams from those clients and combines these data streams (from the individual web-cam data sources) into one output stream.

    &#xA;

    How could that be accomplished ?&#xA;Can I "create" a new frame with ffmpeg, so to speak ? I would be very thankful if anybody could give me a heads up here, maybe I'm thinking in a complete wrong direction.

    &#xA;

    Another question which arises to me is, if I really can just "dump" any data, which I'm receiving from a binary blob created from getUserMedia or MultiStreamRecorder to ffmpeg or if I have to specify somewhere and somehow the exact codecs being used etc.?

    &#xA;

  • swscale/aarch64 : add vscale specializations

    13 août 2022, par Swinney, Jonathan
    swscale/aarch64 : add vscale specializations

    This commit adds new code paths for vscale when filterSize is 2, 4, or
    
8. By using specialized code with unrolling to match the filterSize we
    
can improve performance.
    

    On AWS c7g (Graviton 3, Neoverse V1) instances :
    
                                 before   after
    
yuv2yuvX_2_0_512_accurate_neon :  558.8    268.9
    
yuv2yuvX_4_0_512_accurate_neon :  637.5    434.9
    
yuv2yuvX_8_0_512_accurate_neon :  1144.8   806.2
    
yuv2yuvX_16_0_512_accurate_neon : 2080.5   1853.7
    

    Signed-off-by : Jonathan Swinney <jswinney@amazon.com>
    
Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libswscale/aarch64/output.S
    • [DH] libswscale/aarch64/swscale.c

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