A/V out of sync in FCP yet fine in QT

Apple Final Cut Pro Legacy

A/V out of sync in FCP yet fine in QT

Posted by Kerryn Potgieter on June 2, 2008 at 8:06 pm

Hi,

I’m having a problem with clips captured using FCP 6 [ DV PAL 48 kHz ]
The audio becomes progressively out of sync (on quite short clips way under 5 minutes in length)when played back in FCP either in the viewer or by placing the clips on the timeline.

However playing the .mov files from the Capture Scratch directly in QT the audio and video are in sync.

The confusing part about this is that no playback control settings have been changed and this problem has never occurred before.

Any suggestions would be very much appreciated.

Thanks,
Kerryn

Kevin Monahan replied 17 years, 11 months ago 4 Members · 5 Replies
5 Replies

Marc Brak
June 3, 2008 at 5:42 am

When it gets out of sync, is the audio behind the video, or the other way around?

Is there a red or green render bar over the footage?

What are your timeline settings? Do they match the footage? If not, go to easy setup and change it, then create a new sequence, see if that fixes anything?
Kerryn Potgieter
June 3, 2008 at 7:24 am

Sorry some of the information I gave was inaccurate, the clips range in length from 5 to 10 minutes.
I read somewhere that there’s some sort of option to keep audio and video synced up throughout long clips. Any suggestions?

Oh and there’s no render necessary bar and the sequence, project and clip settings all match.

Thanks,
Kerryn
David Roth weiss
June 3, 2008 at 10:32 am

Have you tried trashing preferences?

David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los Angeles

POST-PRODUCTION WITHOUT THE USUAL INSANITY ™

A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
Kerryn Potgieter
June 3, 2008 at 2:31 pm

Hi there,

I tried trashing the preferences but it appears that this problem had something to do with write speeds over the network as I no longer have this problem with video captured to the local drive as opposed to the server.

Thanks for the advice though it’s much appreciated,
Kerryn
Kevin Monahan
June 3, 2008 at 5:38 pm

You definitely want to work on the local drive, not any networked volume unless it is a SAN with high speed connectivity. Most networks do not have the sustained data rate to play your footage back without dropping frames.

Kevin Monahan
http://www.fcpworld.com
Author – Motion Graphics and Effects in Final Cut Pro

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