I recently compiled Handbrake svn to replace VisualHub for some CRF-goodness However, as is stated at the Handbrake forums, there seems to be a bug that makes some frames blocky using vbv. There is very little info but I have done several tests, its worse with HD sources ofcourse since the bitrate is higher. Anyway, its preventing me from making the great encodes I like. All this testing showed that ATV can handle very high bitrates with no problem, 13 - 15 Mb/s is fine if CABAC is off, maybe even 20 (using VLC to check). Anyway, the happy news is this thread in case you haven't noticed: http://forum.doom9.org/showthread.php?t=140326&highlight=vbv+settings&page=3 Hopefully they will solve this soon. I have actually been encoding without vbv in the mean time, the ATV can usually handle it, even streaming Casino Royal however has scenes with more than 30 Mb/s which the ATV shows in cool slow motion I hope this problem isn't discussed in another thread, when I search google for vbv, almost nothing interesting turns up.