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Audio out of Sync when exporting a ProRes

Dec 6, 2012 11:45 PM

Tags: #audio #export #sync #quicktime #timeline #prores #zoom

Hi There,

We produce masterfiles in ProRes HQ 422. The files are usually feature films and have 8 audiotracks attached.

Audiotracks are uncomp. wave files.

Everything looks fine in premiere, but when the file is exported and opened in Quicktime, the audio is slightly out of sync (about 4 frames).

Sometimes, I notice also sync problems in premiere pro, when zoom in and out on the timeline.

Has anyone heard of that before and how can this be fixed?

I tried already alot, but nothing helped really (cleaned the cache, all updates done, prerendering audio, etc.)

Premiere CS6 runs on a 8 core mac with 16 GB RAM.

thanks for any help!

424 Views 4 Replies Latest reply: able123, Dec 7, 2012 11:20 AM

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1. Jim Simon,

Dec 7, 2012 10:17 AM in reply to saschaklement

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The only thing I can think of is to not use QuickTime for anything, not for exports, not for playback. (That would also mean not using ProRes.)

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2. pinklemos,

Dec 7, 2012 10:41 AM in reply to Jim Simon

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Apple iTunes store e.g. requires Apple ProRes for using videoclips in their shop. There is no way around this. Well, ok, that's Apple's policy, but most of the professional film studios use ProRes encoded Quicktime files both for delivering and for delivered material.

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3. saschaklement,

Dec 7, 2012 11:23 AM in reply to saschaklement

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This is exactly what we do. We deliver movies for iTunes Store, so we have to go with ProRes and Quicktime professional for entering the metadata. Unfortunately, there is no other way around that if you work for them.

After doing more testing today, it looks that it is more a mac problem rather than a premiere problem... Keep you posted.

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4. able123,

Dec 7, 2012 11:20 AM in reply to pinklemos

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Well, it's true a lot of post places are using pro res for final ( not going to cine like at socal delux type place )
http://www.bydeluxe.com/

So, that said, this stuff like premiere pro and fcp, avid, etc is a bit on the low end in comparison...but everyone trying hard to do what they can in the market they have.

I think its worth noting that some post places I know that use FCP export mov with animation codec, from pro res....so maybe try this scenario from premiere pro ( extra steps and time but might work okay for you with sync etc )..

export as avi ( lossless )
then open in quicktime pro
export from QT with animation.

If the post place won't take THAT from you then at least you might be ' in the neighborhood' re: sync and so on...and they can either convert to pro res again or whatever... know what I mean ?

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