Overlaying video with ffmpeg

Question

I\'m attempting to write a script that will merge 2 separate video files into 1 wider one, in which both videos play back simultaneously. I have it mostly figured out, but w

Answer 1

Like the user 65Fbef05 said, the both videos must have the same framerate
use -f framerate and framerate must be the same in both videos.
To find the framerate use:
ffmpeg -i video1

ffmpeg -i video2

and look for the line which contains "Stream #0.0: Video:"
on that line you'll find the fps in movie.

Also I don't know what problems you'll encounter by mixing 2 audio tracks.
From my part I will try to use the audio from the movie which will be overlayed
over and discard the rest.