[FFmpeg-user] Clipping off unwanted span of mp4 file

[Carl Zwanzig]

Possibly with lots of command-line hackery ffmpeg it might be able to do the 
job (extract segments and concat them together), but a real editor will make 
the job a lot easier. I've recently been using the shotcut editor 
(https://shotcut.org/), which is also opensource/free and uses some ffmpeg 
components.

Warning- like any video (or audio) editor, there is a non-trivial learning 
curve; do not expect immediate success (and keep backup copies of the files 
being edited).

z!