Could be your DVD player, could be your DVDs. I have one DVD with no A/V sync problems using the Dolby Digital soundtrack, but it's out of sync on the DTS soundtrack.
Some DVD players and some pre/pros have the ability to set a sync delay (in milliseconds) to deal with this. The latest Rotel processor, the RSP-1068, can do this. Your RSP-1065 cannot. Usually this is a feature of the more expensive/more advanced pre/pros.
Some DVD players and some pre/pros have the ability to set a sync delay (in milliseconds) to deal with this. The latest Rotel processor, the RSP-1068, can do this. Your RSP-1065 cannot. Usually this is a feature of the more expensive/more advanced pre/pros.