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Autres articles (68)

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    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • (Dés)Activation de fonctionnalités (plugins)

    18 février 2011, par

    Pour gérer l’ajout et la suppression de fonctionnalités supplémentaires (ou plugins), MediaSPIP utilise à partir de la version 0.2 SVP.
    SVP permet l’activation facile de plugins depuis l’espace de configuration de MediaSPIP.
    Pour y accéder, il suffit de se rendre dans l’espace de configuration puis de se rendre sur la page "Gestion des plugins".
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Sur d’autres sites (10832)

  • How to force ffmpeg to refresh overlay image more often ?

    30 avril 2019, par Alex Fomin

    I am trying to do sports live-streaming using ffmpeg. Score of a streaming match is being fetched from server and converted to png. This png must appear on top of the video.

    ffmpeg allows to put an overlay over a video stream using image2 demuxer. If I use -loop1, this overlay updates approximately every 5 seconds. How can I force ffmpeg to read it from disk more often ?

    My current attempt with overlay updating once in 5 seconds(mp4 video for testing purposes) :

    nice -n -19 ffmpeg \
    
        -re -y \
    
        -i s.mp4 \
    
        -f image2 -loop 1 -i http://127.0.0.1:3000/img \
    
        -filter_complex "[0:v][1:v]overlay" \
    
        -threads 4 \
    
        -v 0 -f mpegts -preset ultrafast udp://127.0.0.1:23000 \
    
        &

    P.S
    I know, that I can make youtube streaming widget on the website and put score on top of it just using html/css/js. But unfortunately it must be done directly in the video stream.

    P.P.S
    I know, that I can use ffmpeg drawtext. But it is not what I want. I have specially designed png, which must be updated as frequently, as possible ( once in 1-2 seconds would be just great )

  • Generating all P frame intra refresh H264 with x264

    3 février 2021, par Andrew

    I am trying to generate a periodic intra refresh h264 stream with only P frames using ffmpeg and x264 but I always get an I frame at the start.

    


    Is there a way with x264 to create a P frame only stream ?

    


    Commands I am using :

    


    ffmpeg -f lavfi -re -i testsrc=duration=5:size=1920x1080:rate=30000/1001 -s 1920x1080 -pix_fmt yuv420p -f rawvideo out.yuv
x264 --input-res 1920x1080 --intra-refresh out.yuv --b-pyramid none -b 0 --ref 0  -o out.264


    


    Verification :

    


        ffprobe -show_frames out.264 |grep pict_type=I


    


    Or just looking at the x264 output e.g.

    


    yuv [info]: 1920x1080p 0:0 @ 25/1 fps (cfr)
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x264 [info]: profile High, level 4.0, 4:2:0, 8-bit
x264 [info]: frame I:1     Avg QP:13.63  size: 12189
x264 [info]: frame P:149   Avg QP:13.59  size:   874
x264 [info]: mb I  I16..4: 78.7% 18.6%  2.7%
x264 [info]: mb P  I16..4:  2.3%  0.1%  0.0%  P16..4:  3.2%  0.3%  0.0%  0.0%  0.0%    skip:94.1%
x264 [info]: 8x8 transform intra:7.6% inter:91.5%
x264 [info]: coded y,uvDC,uvAC intra: 1.3% 18.9% 3.6% inter: 0.1% 1.1% 0.1%
x264 [info]: i16 v,h,dc,p: 86%  6%  1%  7%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 42% 22% 36%  0%  0%  0%  0%  0%  0%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 30% 32%  3%  1%  3%  0%  3%  0%
x264 [info]: i8c dc,h,v,p: 28%  7% 55%  9%
x264 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x264 [info]: kb/s:189.96

encoded 150 frames, 66.76 fps, 189.96 kb/s


    


  • Generating all P frame intra refresh H264 with x264

    3 février 2021, par Andrew

    I am trying to generate a periodic intra refresh h264 stream with only P frames using ffmpeg and x264 but I always get an I frame at the start.

    


    Is there a way with x264 to create a P frame only stream ?

    


    Commands I am using :

    


    ffmpeg -f lavfi -re -i testsrc=duration=5:size=1920x1080:rate=30000/1001 -s 1920x1080 -pix_fmt yuv420p -f rawvideo out.yuv
x264 --input-res 1920x1080 --intra-refresh out.yuv --b-pyramid none -b 0 --ref 0  -o out.264


    


    Verification :

    


        ffprobe -show_frames out.264 |grep pict_type=I


    


    Or just looking at the x264 output e.g.

    


    yuv [info]: 1920x1080p 0:0 @ 25/1 fps (cfr)
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x264 [info]: profile High, level 4.0, 4:2:0, 8-bit
x264 [info]: frame I:1     Avg QP:13.63  size: 12189
x264 [info]: frame P:149   Avg QP:13.59  size:   874
x264 [info]: mb I  I16..4: 78.7% 18.6%  2.7%
x264 [info]: mb P  I16..4:  2.3%  0.1%  0.0%  P16..4:  3.2%  0.3%  0.0%  0.0%  0.0%    skip:94.1%
x264 [info]: 8x8 transform intra:7.6% inter:91.5%
x264 [info]: coded y,uvDC,uvAC intra: 1.3% 18.9% 3.6% inter: 0.1% 1.1% 0.1%
x264 [info]: i16 v,h,dc,p: 86%  6%  1%  7%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 42% 22% 36%  0%  0%  0%  0%  0%  0%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 30% 32%  3%  1%  3%  0%  3%  0%
x264 [info]: i8c dc,h,v,p: 28%  7% 55%  9%
x264 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x264 [info]: kb/s:189.96

encoded 150 frames, 66.76 fps, 189.96 kb/s


    


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