Star wars is actually a bloody hard film to sync the sound on if you're doing video capture work because about the first ten minutes of film only has dialogue from three humans in that time and two of those are dubbed, so you can only use the Princess Leia vs Vader conversation as a key.

the rest is unuseable as it is either, artoo, threepio or stormtroopers talking, all of whom are wearing masks. the dubbing on all the alliance pilots in the final battle and the two imperial officers on the tantive and most of the officers on the death star apart from Peter cushing were re-dubbed in the states as well. so like I say, a hard film to sync.