Adio and Video not in sync when exporting QT Movie

Hi guys,
I'm having a very strange problem here. I'm using FCS2 and have edited a sequence in FCP using HD720p. In Final Cut Pro, everything is fine, I can play the sequence and the adio matches the video as expected.
When I export the sequence to a QuickTime movie, the final movie has the adio way out of sync from the Video. I have searched through this boards and noticed some other users having the same problem, but couldn't find a solution for it.
Does anyone know what would be the problem, and how I could solve this ?
Thanks a lot in advance,
Stefaan

Hi,
Well, I could try, but I'm not 100% sure that this was the exact source of the problem.
The source media where Screen Captures taken with iShowU, which I was going to use to create a video podcast with. The ScreenCast was recorded using the HDTV 720p codec with 25 frames and 44,0 KHz audio. I imported those clips into FCP6 and noticed that the Sequence preset had 48,0 Khz audio instead, so I imported every source clip into Soundtrack Pro to convert the audio back to 48,0 KHz.
I guess that is where it went wrong somehow. Since at some point FCP indicated that one of the source clips had 44,0 KHz audio and not 48,0 KHz audio ( though in SoundTrack it reported 48,0 KHz ).
I imported the stuff back into FCP and noticed that now the audio of the clips was 48,0 KHz audio, so I was ready to go. I did the cut in FCP and audio was perfectly in sync with the video. Upon export to a QT Movie ( Self Contained or Reference, immediately from FCP or through Compressor 3 it didn't matter ) the sound seemed to be out of sync after a period of time. By the end of one 15 minute clip the sound was about a minute off, which is unusable for a screencast.
Thanks to a suggestion here I exported the original clip from within FCP to a new QuickTime movie containing only the audio, and one containing only the video portion. I dragged those two on a new Sequence and did the cut again.
Once that was done, the export was perfectly in sync.
My guess is that it went wrong in Soundtrack somewhere, and not really in FCP. But I'm not 100% sure though.
I hope this helps for some others who might have a similar problem.
Regards,
Stefaan

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