To: mauckland
Bump.
Just as a heads up, I attempted to use a customised version of the Apple TV HD Video - (H.264, 1280x720, 24fps) setting under Devices. To customise it I changed the audio channels to 3/2+LFE 5.1, and set the Bitrate to 5000 from 3200, and finally changed the Frame Rate to original from 24fps (24fps is not the correct frame rate for the film). The input file is a txmuxed, in m2ts format, version of Iron Man 2 from a blu-ray rip.
Sadly using these settings caused AVS Video Converter to crash during the conversion, leaving me with a unplayable file. Settings screen grab attached.
However changing the bitrate back to 3200, and leaving the other settings as I detailed above, did work.