I'm talking about conversion of HD MKV to Apple TV format using visualhub. Personally I've done an HD MKV at 6600 kbits/sec and it played perfectly and looked awesome, but I haven't had the time to do or try anything higher. *** also if someone can answer this question: I converted some MKV's earlier that had DTS tracks, so I lost the 5.1. I've just found a workaround supposedly for converting DTS 5.1 to AC3 5.1 but I haven't tried it yet. If I convert the DTS track to AC3, and then add that track to an mp4 file and save it all as a .MOV, will apple tv be able to play the ac3 track, or do I need to allow visualhub to convert the ac3 track to apple tv standards.