How to transcode video with lower fps?

Question

Video processing

I want to recode archived videos with low fps, since there is no value from 60 fps there.
Specified mencoder
%* -o %*.mp4 -oac mp3lame -ovc x264 -x264encopts threads=0 -fps 8 The
video turned out to be 4 times smaller than I wanted, but it became 4 times longer. Why? How can I keep the length of the video the same?

Answer 1

Try FFMPEG
ffmpeg -i <input> -filter:v fps=fps=30 <output>