Corrupted QuickTime movies are very difficult to recover. You may have some luck with Digital Rebellion Pro Maintenance Tools:
which contain Corrupt Clip Finder and to help track down corrupt clips and Media Salvage to try and recover the files from the corrupted media.
Don't just by one disk drive, by enough so you can keep complete back up copies of all your media. This is/should be SOP for working on large or consequential projects.
I did keep the original video files on separate hard drives with additional backups. The files were then converted to ProRes, which are kept on these two editing hard drives. I probably should keep backups of these editing drives, but if need be, I can go back to the original files and convert back to ProRes. It would be really cool to fix whatever is wrong with this drive though! Thanks for the tip on the digitialrebellion site.
i would just like to say that i ran into this problem yesterday. took me hours to figure out what was going on. for me, it took forever for the project to open...i was getting the "preparing video to display"....then the "no movie in file" error. i cold not open the sequence and copying the sequence to a new project did not help. opening an older sequence from the autosave vault did not do the trick.
i finally found the culprit: a ruggged lacie drive that the media was on. for some reason, it spun down sporadically. once i disconnected the drive, the project opened right up. HOWEVER, about 20 min. later it happened again. it was the drive itself. in the finder, it said it was connected but it wasn't. check your drive. disconnect and open up another project on another drive to ensure it is not fcp. then reconnect the "faulty" drive and see what happens. for me, i eventually transferred all the media from the lacie onto my caldigit drive and all was fine. it was deceiving, as i say, because finder showed it connected the entire time, but it wasnt. hope this helps someone.