[FFmpeg-user] ffmpeg mp4 encoding with cfr is not working

[Carl Eugen Hoyos]

Sangsu Baek <sangsu.baek <at> gmail.com> writes:

> ffmpeg -f v4l2 -input_format yuyv422 -r 15 -s 320x240 
> -i /dev/video0 -t 30 -y -vcodec mpeg4 -filter:v
> fps=15  /tmp/record.mp4

Complete, uncut console output missing, the video filter 
looks superfluous.

> Problem is output fps is varying.

That is surprising because FFmpeg's mp4 muxer only 
supports cfr.

Carl Eugen