another data point... it seems that if i pause the video, back up a little bit and replay that the sync fixes itself for a while. i think perhaps this is a thing that just gets worse and worse the longer the program goes on.
if i play the file in VLC the sync seems correct, however, it could be caused by scrubbing around in the file in the same way as in Channels. i guess i will just have to watch 10 minutes of it or so in VLC and see if sync is maintained.
also, as expected, telling the appleTV to output stereo fixes the sync problem. unfortunately telling it to change audio formats to 5.1 does not solve the problem.
i haven't been able to try ARC yet.
i do have a snippet of a program that exhibited the problem, but i wanted to play it in Channels to see if the problem could be reproduced on a short file. however, i can't seem to add a .ts file to my Personal Media source. is this to be expected @tmm1? i guess i could temporarily replace a file for an actual recording if adding a transport stream to the personal media is impossible.