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FCP audio sync issue, attempts at fix result in dodgy files – help!
Hello,
I have some Sony EX1 footage here in which 20 out of 500 QT files FCP will play the audio out of sync by either 14 or 19 frames (picture lags) – when shooting no changes were made to settings which were as follows:
1080/25P HQ 16-bit 48Khz
weird thing #1: only FCP will exhibit the out of sync problem, QT or even quickview in the OS X finder will play them back fine …
weird thing #2: once I export the footage without re-syncing it it will then play fine again in QT/finder and will sync fine in FCP – yay! – no… it will beach ball and/or lag/crash FCP/QT/finder once I attempt any sort of movement/scrubbing in any of the timelines
attempting to work with the original un-synced footage and unlinking the audio (and correctly syncing it) as a workaround has failed as whenever I put on any video effect/transition or whatever the effected part will sync correctly and my smarty pants re-sync therefore makes it out of sync again ! arrrrgh!
Basically, anytime I effect or export it the sync issue goes away, but I am left with crashy/corrupted files …
Any suggestions ?
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2 Replies
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Sounds like nothing is wrong with the footage. Something is wrong with your computer or with Final Cut. Try regular trashing preferences, repair permissions, etc. Also make sure you do not have something called “Perian” installed on your machine.
Sean
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no perian, have tried permissions and preferences also … Sync fault not apparent in AE, but exported file from AE will be glitchy …
So its seems it might be two things at fault – one only becomes apparent once the other fault is fixed
I have found a work around which although painful allows me to progress…
Basically the idea is to strip the file down to its components then put it back together, hoping to loose the error in the process (if it is indeed an error)
I extract both audio tracks and the video in QT then import them into FCP, manually sync them then export via QT Conversion (as ‘QT movie’ gives glitchy files again) – then reimport them
only way thus far !
I’d love to know what is goin on however
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