Video Loses Sync On Export


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Video Loses Sync On Export
by John Felt on Jun 25, 2009 at 8:33:27 pm

Hello

I am putting together a little video for a client. When we went to export it we found that the audio and video had lost sync. It is a 3 minute video, and by the end the video was about 4 seconds ahead of where it should be.

Some of the footage was shot on a consumer camera of sorts and I believe is an avi file. I wouldn't think that would have something to do with it... but it might be suspicious.

Has anyone out there experienced anything of this sort? If you have any thoughts on this problem, I would love to hear your solution!

Thank you very much in advance for any help you can offer.
John

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Re: Video Loses Sync On Export
by Thax Clave on Jun 25, 2009 at 9:03:35 pm

Did you Mixdown the audio?

You should do this, even if there is only one audio track.

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Re: Video Loses Sync On Export
by John Felt on Jun 25, 2009 at 10:06:18 pm

More or less.

The audio is mostly one aif file, with a few other bits put in over it.

However the audio is not problematic. When I compare the final timeline to the export, the audio is in the exact same spot. It is the video that is moving at a slightly faster rate.

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Re: Video Loses Sync On Export
by Thax Clave on Jun 26, 2009 at 3:24:23 am

Since you glossed over my question, "Did you MIXDOWN the audio ?"

I have to assume that you did not do the Mixdown.

It is a specific function in FCP that can solve a lot of odd problems on output.

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