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  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

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    Afin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
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Sur d’autres sites (9931)

  • Is there a way to send ffmpeg data directly to a TCP Client ?

    3 février 2021, par KosmosisDire

    I am using ffmpeg to send screen capture directly to a C# TCP server. However, due to some bug or technical limitation, the Quest 2 (my build device) cannot bind ports. (There is very little info regarding this bug online, but as far as I can tell I can't get around it). So I cannot have a C# server on the Quest, I must have a client on the quest to receive data. However, ffmpeg sends data as a TCP client. So I need ffmpeg to act as a server.

    


    I tried sending the data through a server on my computer that then sends the data to the C# client. But I get less than 1 fps with huge lag. Normally, I get a good 30 fps with low latency when sending directly to a server.

    


    So my question :

    


    Is there a way to get ffmpeg data directly to a client, or indirectly without increasing the latency ?

    


    Here is the ffmpeg command I am using :

    


    ffmpeg -f gdigrab -i desktop -pixel_format rgb8 -video_size 896x504 -vf scale=896:504 -framerate 5 -r 30 -f rawvideo tcp://127.0.0.1:846


    


    I can include code for my C# client and server attempts as well as the middleman server, if I need.

    


    Thanks for any help !

    


  • Debayer video with ffmpeg

    26 septembre 2016, par Andrew Spence

    Looking to debayer video with ffmpeg. I can’t find a way to do it without piping raw video between two instances of ffmpeg, because I can’t change the pixel format of my input video "in place" from gray to bayer_gbrg8. So, this command works :

    ffmpeg -i fr_losslessmovie_png_codec.avi -f image2pipe -pix_fmt gray \
    
-vcodec rawvideo - | ffmpeg -r 25 -f rawvideo -s 2048x700 \
    
-pix_fmt bayer_gbrg8 -i pipe:0 -y -pix_fmt yuv420p -b:v 25000k \
    
fr_debayer_compressed.mp4

    I would have given the source movie this pixel format, but didn’t realize ffmpeg suported bayered pixel formatting.

    Didn’t see this exact question online, and have not found a way to change the pixel format with video filters etc. without ffmpeg thinking i’m trying to convert the data. I just want to change the pixel format that the already existing gray data has been assigned.

    Thanks in advance !
    Andrew

  • avcodec/videotoolboxenc : Set profile (main/main10) on HEVC encode

    21 septembre 2020, par Harry Mallon
    avcodec/videotoolboxenc : Set profile (main/main10) on HEVC encode

    Signed-off-by : Harry Mallon <harry.mallon@codex.online>
    
Signed-off-by : Rick Kern <kernrj@gmail.com>
    • [DH] libavcodec/videotoolboxenc.c

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