NOTE: The options -a and -b override a given timetable A timetable should look like this, the format is always: startpoint endpoint startpoint endpoint like: ---- 8< cut here ---- 0:01 1:00 1:05 3:57 11:15 19:33 01:01.34 02:39.78 0:0 -1:0 ---- 8< cut here ---- The ':' is mandatory! Negative time means distance from end of file. Syntax is NOT hh:mm:ss but mm:ss.subeconds So writing a timetable should not be difficult, just use your common sense ;-) Beware that the Ogg resolution is only about 0.25 seconds.