I can have a synced mpg2 (DVD compliant) file , looks and sounds good, with all editing done. But if I prepare for burn , by adding chapters, thats where I then get sync problem. (either on burned disc , or "saved to HD" as .vob set) Further into the movie , audio gets more out of sync.

Regarding best usage of drives , and defrag...as these are two points brought up in audio/video sync discussions;

When I defrag, any .vob files are left untouched, as are .mpg files that approach 1G size...even tho' there is plenty of free space on the drive.

Re: drive usage. Way back I thought that it would be best to have files ready to burn on 2nd drive, to free up primary drive where burn program runs from. Agree?? Now, I wonder about that "Temp" folder that many programs need to write to. Would that be the more important part of this process , IF it is the location of burn app.s final "ready for burn" files. Confused about this. Reply may differ as to whether beginning with an .mpeg movie file , or prepared set of .vob files. ??