Notes
How to strip a video file without re-coding
$ ffmpeg -i input.avi -vcodec copy -acodec copy -ss 00:00:03 -t 00:03:55 output.avi
or
$ avconv -i input.avi -c:v copy -c:a copy -ss 00:00:03 -t 00:03:55 output.avi
$ ffmpeg -i input.avi -vcodec copy -acodec copy -ss 00:00:03 -t 00:03:55 output.avi
or
$ avconv -i input.avi -c:v copy -c:a copy -ss 00:00:03 -t 00:03:55 output.avi