[FFmpeg-user] Video files splitting and merging issue

[Carl Eugen Hoyos]

Jim Shupert <jshupert <at> pps-inc.com> writes:

> Basically  of
> ffmpeg -ss Num -t Num -i <file>
> or
> ffmpeg  -i <file> -ss Num -t Num
> is one superior in performance than the other?

Yes.
ffmpeg -ss n -i file seeks to n (if this is supported) 
which usually works without any delay
ffmpeg -i file -ss n decoder the first n seconds which 
can take considerable time.

Carl Eugen