Using an HD410 v 3.7.50 to play a 5 minute .mov file. The lip sync is soft, with the audio leading the image by perhaps 5 frames. Just enough to be disconcerting. Using a class 10 SD card. Average bit rate is 3.6 mega bits / sec, so it would seem that the HD410 is not being stressed. The video plays in sync on a PC with QuickTime player. I put just the video on the SD card to eliminate any BA issues. Plays fine on PC, out of sync on HD410. Is there a prefered encoding scheme?