When I split an AVI File with the command: mencoder -ovc copy -oac copy -endpos 0:50:00 -o foo-part1.avi foo.avi mencoder -ovc copy -oac copy -ss 0:50:00 -o foo-part2.avi foo.avi In the second File the Sound starts from the beginning of the Movie? The video is right, but it has the same sound than the first file.