FFmpeg constant framerate to variable

Question

When recording gameplay with constant 60fps, it records at 60 fps even if the gameplay is ~30 fps or lower.

Is there any way to transcode the 60fps video from constant to variable FPS, so it uses timestamps not FPS?

score 3 · Accepted Answer · answered Dec 08 '16 at 05:50

3

Use

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

The mpdecimate filter removes duplicate frames, if present, in the recording. The vsync vfr prevents FFmpeg from duplicating frames to match the stored framerate.

answered Dec 08 '16 at 05:50

Gyan

36,303

You're a magician – VixinG Dec 09 '16 at 06:36
Thanks a lot! This achieved the higher level goal to significantly reduce file size while maintaining the same quality in videos like screen recordings which have some dynamic scenes which should be kept at max FPS but also some scenes where a still image (I-frame) lasts e.g. 10 seconds (= 1/10 = 0.1 FPS). – porg Jun 30 '23 at 23:38

FFmpeg constant framerate to variable

1 Answers1