I'm sorry, I meant audio is faster than the video. I've checked the lip sync option in the AVR (yamaha RXV1800), played around the setting, still no good unless I manually adjust the ms, but then it will affect all source too (e.g. DirecTV, Bluray player, etc.).
The reason I asked in here is because I only have this problem when playing ripped bluray movie (or even the downloaded Reference BD disc over at the Dedicated Theater sub forum). DirecTV, movie disc played from Bluray player, all are fine.
And I do remember it plays fine before.... Don't know what did I do.... May be I'll re-run the AVR setup again and see....
Thanks for all the advice guys!