Your frame rate has changed. Since your original edit was 30 (29.97) frames per second, and your new edit is 24 frames per second, you need more seconds to see the same number of frames. I tried to do the math, it works out about right – 6 fps x the total number of seconds divided by 24 (fps) works out to 56 something…
I’m guessing that FCP was also retiming your video for you – interpreting it at 29.97, so the timecode doesn’t match exactly the re-interpreted (24 converted to 30 converted back to 24) footage in the new sequence. I assume you had to render it?
I haven’t actually done this, but you could try removing attributes (right click) and see if you have speed changes. But you may have to re-edit. Not sure…hopefully someone smarter will weigh in with the quick fix.
Your other option is to export your finished 29.97 cut as a quicktime and convert that. What is your delivery format?
Good luck,
D
Dan Monro
FCP, Avid, AfterFX, Atlanta
MacBook Pro 2.53 GHz Intel Core i5 4 GB ram
Mac OS X 10.6.4
NVIDIA GeForce GT 330M
Final Cut Pro 7 Quicktime 7.6.6
– OR –
2 x 3.2 Quad Xeon; 16 GB ram
Mac OS X 10.6.4
NVIDIA Quadro FX 5600 Final Cut Pro 7.0.2 Quicktime 7.6.6