Originally Posted by SmokeyTheBear

take screenshot every 10secs for 15 mins
ffmpeg -i video.vob -an -f image2 -t 00:15:00 -r 10 thumbs%d.jpg
split 3 parts ( ss is start time t is length )
ffmpeg -i video.vob -ss 00:00:00 -t 00:20:00 out1.wmv -ss 00:20:00 -t 00:20:00 out2.wmv -ss 00:40:00 -t 00:20:00 out3.wmv