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