Let me clarify: I do not want to do standard deinterlacing, and what I'm trying to do has nothing to do with inverse telecine 60i to 24p conversion. When shooting action at high shutter speeds, deinterlacing makes each frame looks like a double exposure, and the resulting video is still only ~30 FPS. I want to convert each field into completely separate progressive frames so that instead of having 30i I have 60p with either half the original vertical resolution or else the missing lines interpolated with something along the lines of Photoshop's Bicubic resizing (to eliminate any vertical jitter from the 1-line offset of each field). Then I intend to downsample the footage to something along the lines of 853x480 resolution, so that the final video is 853x480/60p.
The G Map Frames plugin is pretty much what I'm looking for, except I'm not using FCP so I'd need a standalone equivalent. Any thoughts?