Mac produced mp4 out of sync in Windows Camtasia 8 - convert to what?

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I have a mp4 file that was produced in a studio on a Mac. When I import it into Camtasia 8 (Windows), the audio is out of sync. I'm thinking it's an encoding issue, because it plays fine on my Windows machine in Quicktime, but not in Windows Media Player.

I can convert the file, but can find the settings to utilize for ideal editing in Camtasia. Does anyone know the best file format/specs to import into Camtasia? I found this post (, but need more specifics.

ETA: I have it in HD 1080p 29.97fps H.264 right now, but it's making the player in Camtasia chug which is not conducive to editing.
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Courtney Wozetek

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Posted 4 years ago

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Timbre4, Champion

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It is likely a variable bit rate clip; this becomes evident when placed on a project timeline and the audio gets out of sync. Someone else may have a shortcut to get it converted to fixed rate.

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