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Audio Sync Problem: New to Premiere

New Here ,
Sep 10, 2022 Sep 10, 2022

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I had a mini dv tape digitized by Southtree which came back and mP4.  I created a Premiere Project and started editing sequences.  The full hour long tape plays fine but when I'm editing sequences everything from the first half of the tape works fine but the clips created from second half are out of sync.

 

Any info would be appreciated.

 

Thanks

 

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Community Expert ,
Sep 10, 2022 Sep 10, 2022

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[Moderator moved from Using the Community forums to Premier Pro.]

 

Nancy O'Shea, Product User & Community Expert
Alt-Web Design & Publishing ~ Web : Print : Graphics : Media

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Community Expert ,
Sep 11, 2022 Sep 11, 2022

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Is the out of sync constant or does it vary?

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New Here ,
Sep 18, 2022 Sep 18, 2022

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It is constant.  The dv tape is an hour long but the difficulty happens when I'm slightly more than halfway through the original tape.  I have several other tapes from the same batch and they also go out of sync about halfway through.  They are in sync when I'm simply playing the entire tape in my media player but ONLY when I have it in Premiere and am trying to create sequences past the halfway point.

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Community Expert ,
Sep 18, 2022 Sep 18, 2022

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That's an issue where the sync wasn't setup correctly to begin with, typically. The audio and video are very slightly different in "speed".

 

The best 'fix' I've seen for this is to go to the end of the sequence, set your timecode showing to Audio units, unlink the video & audio, then adjust audio speed track either slowing it (to 'extend' it's played time) or speeding it (to 'shrink' its played time).

 

The goal is to match that to the video track. For those situations where both are constant but not identical, this works to fix that. After finishing, then 'link' the video & audio tracks again.

 

Neil

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Community Expert ,
Sep 18, 2022 Sep 18, 2022

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LATEST

Please use the free MediaInfo and post a screenshot of the properties of your media in tree view:
https://mediaarea.net/en/MediaInfo

Many users are having issues with VFR. If the file is variable frame rate, use Handbrake to convert to constant frame rate:
https://handbrake.fr/downloads.php
Here is a tutorial:
https://www.youtube.com/watch?time_continue=34&v=xlvxgVREX-Y

Shutter Encoder may also be used to convert to Constant Frame Rate:
https://www.shutterencoder.com/en/

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