I already made the mpeg2 and ac3 and they both in excellent condition... the sound was out of sync by 0.782 sec so I stretched the audio that amount and is synced now... I notice when I added the ac3 that the project size jumped from having 400MB left to a deficit of almost 2GB! and the AC3 is only 400MB so I want to know WTF is dvdit trying to do... I already finished making the chapters and I can't go on because of this inquietud.