ffmpeg video frame deduplicate

ffmpeg video frame deduplicate

dedublicating frames from video

good explanation
https://kodintent.wordpress.com/2020/04/19/ffmpeg-mpdecimate-parameters/

ffmpeg mpdecimate filter

    This will generate a console readout showing which frames the filter thinks are duplicates.

    ffmpeg -i input.mp4 -vf mpdecimate -loglevel debug -f null -

    To generate a video from a video source with audio with the duplicates removed

    ffmpeg -i input.mp4 -vf mpdecimate -vsync vfr out.mp4

    To generate a video from a video source without audio with the duplicates removed

    ffmpeg -i input.mp4 -vf mpdecimate,setpts=N/FRAME_RATE/TB out.mp4
    



-i 1.mkv -vf mpdecimate=max=3:hi=6400:lo=4000:frac=0.7 -vsync vfr


filter compare two frames by every 8x8 block
- if there at last one block have diff more than "hi" - it is not a dublicate
- "frac" is how many blocks above "lo" value is allowed. frac=1 - all blocks allowed to be higher than "lo" and only "hi" metter

max possible diff is 255*64 = 16320  ??