File / Import / AVI Footage...

You'll probably want to switch off the ground plane, or it'll obscure half of the video.

It also seems quite fussy about the AVI you choose, you may have to experiment / convert your footage to use a supported codec (no clue which those are, sadly).

If you wanted to feed it to a console program to have it do the work, you could maybe use XnView (well, its console converter, NConvert).

XnView has an SDK which may help too, but you'd probably need to write your own .NET wrapper for it, I don't know of any.

I haven't looked at this much myself, but RSR files are actually ye olde Apple PICT images, they're just missing the header.

If you insert a load of nulls at the beginning of the file, 0xFC bytes in length, it can be processed as a PICT.