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    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
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  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
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  • How to efficiently create H264 mpeg from two clips with known different motion intensity ?

    14 février 2017, par Serge

    Given an audio and an image we create a static image "video" and then append a short clip that has a rather intense motion.

    Audio and image varies from run to run. Appended animation is always the same. Rendering is done with ffmpeg on a remote server. Rendered file must be in h264 codec mpg.

    Speed of encoding is crucial. Is there a fast and effective way to generate and merge the two clips quickly ?

    Atm we use the following ffmpeg commands :

    // create first clip from image
    
ffmpeg -loop 1 -r 24 -i $IMAGE -i $AUDIO -t $AUDIO_LENGTH -c:a aac -profile:a aac_low -ar 48000 -b:a 192k -bsf:a aac_adtstoasc -strict -2 -y -c:v libx264 -profile:v high -preset veryfast  -tune stillimage -crf 24 -x264opts bframes=2 -pix_fmt yuv420p -safe 0  clip1.mpg
    
// . . .
    
// then append the animation
    
ffmpeg -f concat -safe 0 -i list.txt -c copy -y -safe 0 final.mpg

    Intuition is that we can benefit form knowing exact timing of a first clip with a static image and the second one with intense animation – like it is determined in the 1-st pass of a 2-pass compression.

    Someone experienced in tech of h264 codec and mpeg please advice.

  • avcodec/h2645_sei : Remove dead checks

    5 mai 2024, par Michael Niedermayer
    avcodec/h2645_sei : Remove dead checks

    Fixes : CID1596534 Dereference after null check
    

    Sponsored-by : Sovereign Tech Fund
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/h2645_sei.c

  • avcodec/fmvc : remove dead assignment

    4 mai 2024, par Michael Niedermayer
    avcodec/fmvc : remove dead assignment

    Fixes : CID1529220 Unused value
    

    Sponsored-by : Sovereign Tech Fund
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/fmvc.c

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