[FFmpeg-user] join two video files portions

Carl Eugen Hoyos cehoyos at ag.or.at
Sat Feb 2 10:06:03 CET 2013

frank10 <aruForum10 <at> deveritate.net> writes:

> I have two avi videos and I want to make a third one merged like this:
> videoC = the latest 5 sec of videoA + all the videoB

There is a concat demuxer that should allow this 
combined with -ss

> Also, the videoA could be opened and recording from a webcam, 
> so I could not know which is its length.

I don't think this is possible (in one step).

Carl Eugen

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