Does anyone know of a method to get the keyed background to move "in sync" with the foreground? I would try Motion but the camera movement isn't simple pan and tilt (chasing hyperactive small pets around an enclosure. The master shot is a keyed lock-off. The close up will move somewhat erratically.)
Yipes! Motion tracking hyperactive animals on a tight shot? You've got your hands full! You're a brave man, sir....
I'm a big believer in After Effects for such things, and if you have access to AE9, you could give motion tracking with Mocha a shot... it might work better than AE's own built-in motion tracker. AE's motion tracker might be able to do it -- IF there are good enough tracking points in the shot -- but it'll be a long process... not exactly automatic.
And I hope your background is big enough so that its resolution can withstand cutting to a tight shot.
Not to mention pulling a convincing key, which ain't exactly FCP's long suit.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA