Basically, the problem is I’m an idiot. Okay, maybe not stupid but ignorant.
I shot the footage with a GL-2 in standard def. Since I’d later like to submit this to a local film festival in 16:9 I was trying to set it up as such, and the only way I got that to work in iMovie was going with 1280 x 720 in AE. In order to make that work I had to use my footage at 175%.
When I started over at 680 x 480 and the footage at 100%, I exported with no compression. Viola, everything looks good! Very little flicker, in fact I’m fine with it. It’s not feature film level compositing but for what I’m doing it will work!
Thanks again to all,
Thomas