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Premiere CS6 PC audio sync in QT
I use PC Premiere CS6. I have a client who would like QT HD files from a multicamera project. The source cameras are mixed HDV 1440 x 1080i 25fps and AVCHD 1920 x 1080p.
Normal MP4 exports and DVD/BluRay creation are fine on my machine, but when I create Quicktime files, the audio is out of sync (late). I am not sure if this is a probmlem with QT player on a PC, and have not had a chance to try the files on a Mac.
I have tried several QT audio and video render options – including AAC, Apple Audio and Uncompressed Audio, but the result is the same.
Anyone had this problem or knows the solution?
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3 Replies
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If the sync is slipping further and further out-of-sync, I wonder if the flags in the Quicktimes are correctly set (within the quicktime files themselves). There was a discussion about it here (in a FCP7 environment) and how to fix it so FCP7 would see it correctly via editing the XML data. https://library.creativecow.net/lyon_matt/fixing-fcp-assets/1
The relevant part about editing the XML data starts on page 2.I experienced this problem with Qucktime in MacOS 10.5 running FCP7, the problem was unknown to me, but my workaround was to change the audio speed of each sound clip to 109% (not ideal, or, recommended). I figured this was because my 23.976 footage was being interpreted as 24 fps in the audio track (all audio was 16 bit 48KHz). When I upgraded to OS 10.6 it was fixed in the same FCP7. So I believe it is a quicktime issue. I don’t know if there is a QT upgrade for you on the PC, or if Premiere relies on the QT sub-programming/sub-framework the way FCP7 did.
In any event, this may be a clue to help you solve the problem. The old QT 7 had it’s problems even on the mac, perhaps they didn’t get around to fixing it on the PC version, or, there is an update you need to apply. QT 10 is better but has provided me with some new mysteries.
Hope this helps
Phillip Todd
Cinematographer -
Hi Phillip, sorry I did not get back sooner.
The audio does not creep, it is out of sync by the same amount the whole way through.
I have since done a test, playing the file on a Mac, and there is a much smaller error. Probably acceptable by the client.
From what you have said, I tend to feel it is a QuickTime problem.
Thanks
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Perhaps a quicktime on windows problem…? If there is anything to update, install the updates and try again.
I am just curious as the more complex these programs get, the more basic things sometimes get broken, like sync. Interesting.
Report back if you find a solution.
Phillip Todd
Cinematographer
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