Extract (cut) a clip with mencoder and ffmpeg
ffmpeg -sameq -ss 00:02:00 -t 8 -i long.mov short.mov
ffmpeg -y -i input.avi -ss 30 -t 10 -vcodec copy -acodec copy output.avi
mencoder -ss 1284 -endpos 102 movie.avi -oac copy -ovc copy -o movie-clip.av
mencoder also accepts hh:mm:ss format
mencoder -ss 1284 -endpos 102 movie.avi -oac copy -ovc copy -o movie-clip.avi
Läs mer: handy mencoder/ffmpeg commands