Audio sync problems..

B

BajotierraTV

Member
I recently did a 5 camera shoot of a concert that I'll be editing for a DVD, we shoot at 24p (Not advanced). Captured the footage at DV NTSC 29.97 48khz using FCP. The audio was recorded with ProTools at 48khz. When I try to sync up the video with the clean audio it start drifting from the footage after a while.

Am I using the wrong settings? Why is the audio going out of sync after a while?
 
Re: Audio sync problems..

Your sequence is in 29.97 fps, right?? Not 30.

Hmmm... Don't really know. I do some messin until I find a good answer.

CaptM
 
Re: Audio sync problems..

Yeah, my sequence setting is at 29.97. Shot at 24p and captured at DV NTSC 29.97 48khz. But my audio keeps drifting.

When you shoot at 24p(not advaced) and capture at regular DV setting (29.97) it shouldn't do anything funky. But the audio starts drifting away. Don't know what to do.

Please HELP..
 
Re: Audio sync problems..

I used to have this problem in v3 and v4.1 -- do you have the most up to date versions? HD and QT 6.5.??

The work around is only capture 10 - 15 minutes of film at a time. Hate to say it... but it does work. Hope you're not too far in.

Good luck,

CaptM
 
Re: Audio sync problems..

Fixed the problem.. Barry Green pointed me in the right direction.
There is an option in my audio editing program (peak) to convert the 48khz audio to match with drop frame footage. I had to convert the audio to 47952.1khz (1% slower) and bring it into FCP again. It matched perfectly. Very strange, I had never heard of this before but it worked.

Thanks Barry
 
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