Help multicam edit, out of sync after 40 min. at DVinfo.net

Kristian Kettner · August 20th, 2009, 12:31 PM

Doing a multicam edit in fcp ( version 6.0.6)
Just started to do a little test set up with 2 video's. I sync them up and it is all god but after 40 min one of the videos is 4-5 frames behind! This is a Huge problem! it is a 1 hour live concert filmed with 4 EX1 all where set to (1080 25p 35Mb/s VBR) So that should not be the problem.

I sync up the video with in point's in the beginning, but I could see that it was a little behind in the end.

So I do a quick sync in the time line with 2 clips on top of each other, sync the movement in the beginning, set the opacity to 50 so it is half transparent, and the I can se that one of the cameras is still behind...... after 30-40 min. HOW is that possible ?

BTW my time line setting's should be correct: Unlimited RT, Dynamic.

Has any body heard about this problem be for?

Kristian Kettner · August 20th, 2009, 01:18 PM

well the job has to be done. So I just adjusted the speed of the clip with 0.02 % (27 frames) and now it plays perfect all the way.

Shaun Roemich · August 20th, 2009, 01:31 PM

PERSONALLY, I would have placed all four video clips on four different tracks in the timeline and resync'd the out of time footage at edit points by sliding the "offending" clip back into sync. That's how I handle out of sync issues.

And the issue of the camera falling "out of sync" is due to internal clocks not running at EXACTLY the same speed, which is why broadcast cameras have the option to GENLOCK (Black Generator Lock) cameras to each other using continuously connected BNC cables (NOT just "jam locking") or to master black/sync so that each camera's clock is "firing" at EXACTLY the same rate AND the frame scan of each camera begins at EXACTLY the same issue (useful for live switching).

William Hohauser · August 20th, 2009, 01:50 PM

Is the file suddenly behind or does it gradually go out of sync?

Kristian Kettner · August 20th, 2009, 02:06 PM

Thanks for the tips, and knowledge! I will remember that for my next concert/ multicam edit

August 20th, 2009, 12:31 PM	#1
Kristian Kettner New Boot Join Date: Jan 2008 Location: Aahus Denmark Posts: 18	Help multicam edit, out of sync after 40 min. Doing a multicam edit in fcp ( version 6.0.6) Just started to do a little test set up with 2 video's. I sync them up and it is all god but after 40 min one of the videos is 4-5 frames behind! This is a Huge problem! it is a 1 hour live concert filmed with 4 EX1 all where set to (1080 25p 35Mb/s VBR) So that should not be the problem. I sync up the video with in point's in the beginning, but I could see that it was a little behind in the end. So I do a quick sync in the time line with 2 clips on top of each other, sync the movement in the beginning, set the opacity to 50 so it is half transparent, and the I can se that one of the cameras is still behind...... after 30-40 min. HOW is that possible ? BTW my time line setting's should be correct: Unlimited RT, Dynamic. Has any body heard about this problem be for? __________________ Filmprodcution Reklamefilm Viral film www.kettner.nu

August 20th, 2009, 01:18 PM	#2
Kristian Kettner New Boot Join Date: Jan 2008 Location: Aahus Denmark Posts: 18	quick work around well the job has to be done. So I just adjusted the speed of the clip with 0.02 % (27 frames) and now it plays perfect all the way. __________________ Filmprodcution Reklamefilm Viral film www.kettner.nu

August 20th, 2009, 01:31 PM	#3
Shaun Roemich Inner Circle Join Date: Sep 2002 Location: Vancouver, British Columbia (formerly Winnipeg, Manitoba) Canada Posts: 4,088	PERSONALLY, I would have placed all four video clips on four different tracks in the timeline and resync'd the out of time footage at edit points by sliding the "offending" clip back into sync. That's how I handle out of sync issues. And the issue of the camera falling "out of sync" is due to internal clocks not running at EXACTLY the same speed, which is why broadcast cameras have the option to GENLOCK (Black Generator Lock) cameras to each other using continuously connected BNC cables (NOT just "jam locking") or to master black/sync so that each camera's clock is "firing" at EXACTLY the same rate AND the frame scan of each camera begins at EXACTLY the same issue (useful for live switching). __________________ Shaun C. Roemich Road Dog Media - Vancouver, BC - Videographer - Webcaster www.roaddogmedia.ca Blog: http://roaddogmedia.wordpress.com/

August 20th, 2009, 01:50 PM	#4
William Hohauser Inner Circle Join Date: Dec 2005 Location: New York City Posts: 2,650	Is the file suddenly behind or does it gradually go out of sync? __________________ William Hohauser - New York City Producer/Edit/Camera/Animation

August 20th, 2009, 02:06 PM	#5
Kristian Kettner New Boot Join Date: Jan 2008 Location: Aahus Denmark Posts: 18	hmmm I still have alot to learn :-) Thanks for the tips, and knowledge! I will remember that for my next concert/ multicam edit __________________ Filmprodcution Reklamefilm Viral film www.kettner.nu