We've edited a short film we shot on REDcam. Edited it in 1K format in FCP. now want to put it out as a 4K version, can we just import the raw footage in redcine and export as 4k then reconnect media thru FCP?
There ain't much reason to work in 4K in post. The majority of films for cinema is still processed in 2K, even if coming from 35mm. 4K stuff from the Red will still look great when processed in full quality and scaled to 2K.
Director of the Institute of Media Research (IMF) at Braunschweig University of Arts
There are a few ways to do this. Crimson has been mentioned, it's a good way to go, and possibly the most economical (aside from writing down the in-out points and manually setting them for render in RedCine/RedAlert).
The way I do it is to write out an EDL from FCP (assuming that you were using either original camera proxies, or logged & transfered capture footage that has the correct metadata - reel/clip names & in/out timecode), import it into Scratch, and do the conform & grade there. This is, in my experience with Red footage, the aboslute easiest and highest quality way to go.
Let me know if you need more info on that workflow.