hi,here is the situation:I have the same movie on 2 different dvd's.dvd1 movie is 16/9 good quality,extras,meniu,everything,but it has corrupt dd20 ac3 stream,it looses sync from minute 56.the other dvd has a perfect dd20 ac3 stream but the movie and the dvd quality is poor.So,i want to take the good ac3 stream and put it in place of the corrupted stream.But,of course,is completely out of sync.What should i do to find out the corect delay?So far, nothing i've tryed worked,so i'm running out of ideas.I should mention that one movie is PAL and the other one is NTSC.I even used besweet to convert framerate of the ac3,but it still is out of sync.Can anyone help please?Any ideea is appreciated.Thx