Don't know what to say. I'm using After Effects CS3 to encode as "MPEG2 Blu-Ray" because it supports multiple cores and Encore CS3 does not. I'm giving H.264 a pass because when I import the results they're always corrupt. (Side note: Is this going to generate a file that I can burn on a Blu-ray disc with Encore and expect the result to play?)

One can encode in a number of different ways. As it happens, my AE project is 59.94fps, and I very much want to keep that temporal information. Here is what I have tried:

59.94p project -> MainConcept "H264 Blu-ray" "HDTV 29.97fps" : A largely corrupt video.
59.94p project -> MainConcept "MPEG2 Blu-ray" "HDTV 29.97fps" : Video is fine but each frame is composed of identical fields, meaning half of the temporal info has been dumped.
59.94i project -> MainConcept "MPEG2 Blu-ray" "HDTV 29.97fps" : Identical to the above.
(This last item was accomplished by moving my 59.94p project into a 29.97fps timeline. The fact that AE properly interlaced consecutive frames was determined by re-importing the 29.97fps composition into another 59.94 comp.)
59.94p project -> MainConcept "MPEG2 Blu-ray" 720p 59.94fps : As one might expect, here the full 59.94fps is retained. However the resolution has of course suffered intolerably.

In short, the ONLY time the MainConcept codec properly encoded 59.94 fields or frames per second was when I specified 720p@59.94fps, a resolution much lower than that of my project. I am desperately hoping that 1) there's a way to get the full 1080i@59.94 fields per second, and 2) the output being generated by this "MPEG2 Blu-ray" codec is something I'm going to be able to use in Encore CS3.

Help? ;p