I recently bought a DVD of a popular sitcom. On my DVD player the picture and sound are WAY out of sync on some episodes. However when I play it on my computer it's perfect. No other DVD I have does this . Any ideas ?
That sounds like a home made dvd and used either repaired or joined original files before converting to dvd format.
No matter what anyone says, you will NOT fix this without remaking dvd with better source files.
Just because plays ok on PC, does not mean will play the same on home dvd player. Sorry.