Read foo.mp4, change fps to 25, and save to bar.mp4: mp4fpsmod -r 0:25 -o bar.mp4 foo.mp4 Read foo.mp4, change fps of first 300 frames to 30000/1001, next 600 frames to 24000/1001, and rest of the movie to 30000/1001 (producing VFR movie): mp4fpsmod -r 300:30000/1001 -r 600:24000/1001 -r 0:30000/1001 -o bar.mp4 foo.mp4 Edit timecodes of foo.mp4 with timecode_v2 described in timecode.txt, and save
