YES! OK, so we understand

YES! OK, so we understand each other.. thank you for the reply first of all.. so now I've read that option (Unlock/recompress/re-encode) and I was confused about the unlock /recompress operations… I would appreciate it if you'd explain briefly what's the difference and suggest programs and I'll do the rest, I have a few knowledge about audio sync situaitions so extra info would be even better.. thank you