ffmpeg-vfr-scene-det

Reducing video via scene detection to essential frames and encoding it with variable fps. This will not work well with most video contentand is very unorthodox.

extract frames

Make the script executable: e.g. chmod +x getframes.sh. Make a directory called frames. e.g. mkdir frames. Run script ./getframes [scene value] [video file].

Set scene value for more or less aggressive scene detection:

0 - very aggressive

1 - not aggressive or even disabled

e.g. 0.01

encode extracted frames with variable fps

ffmpeg -f concat -safe 0 -i concat -vsync passthrough [output file] You can add ffmpeg options, but these are required.

re-encode with constant fps

ffmpeg -i [vrf video file] -r [framerate of the original video] -vsync cfr [output file] You can add ffmpeg options, but these are required. Re-encoding as cfr can improve compatability with video players and displaying subtitles.