OUT OF SYNC!!! HOW DO I FIX MY PROJECT!

ZippyGaloo wrote on 8/19/2003, 11:45 PM
What's the deal!! I just captured some video via firewire from a Panasonic AG-DVX100. When I looked at it during playback it is out of sync!! The video appears to procede the audio by about 2 or 3 frames!! Has anyone else experienced this with either vegas or this particular camera?

HOW DO I FIX THIS!! HOW WOULD I HAVE FIXED THIS IF I'D ALREADY DONE AN HOUR LONG PROJECT?

Comments

Grazie wrote on 8/20/2003, 12:07 AM
"Has anyone else experienced this with either vegas or this particular camera?" No, and I don't have the camera. Well, in the past I've thought that the stuff looked a bit suspect. But, playing/Previewing at Preview quality and keeping Preview Window smallish, helps. Maybe your RAM is being "eaten" . . .

""HOW DO I FIX THIS!! HOW WOULD I HAVE FIXED THIS IF I'D ALREADY DONE AN HOUR LONG PROJECT? "" - Oh dear! Nasty question! - I can think of some really nasty solutions - yuck!

Anyway . . . here's my further questions to you:

How have you registered this happening?

Are you seeing this within Preview?

Is this a new thing?

2 to 3 frames indicates to me you are looking at your captured work at the a zoomed in timeline - is that the case?

Are you seeing an audio graph falling behind the video?

I'd been inclined to do a final "Belt 'n Braces" check. Take a piece of "suspect" film and render to New Track. Print To Tape. And run that on your TV. See if that is out of synch.

Have you previewed/played your work on the cammie? Any problems there?

Nasty one - but let's see if it is as bad as you say it is. Have a go at the tests. Maybe it is the Camera and Vegas having a battle . . . . maybe it is your RAM and Preview . . . until I would have carried out the tests, I 've suggested, I wouldn't steam in with "solutions" which would confuse the issue. One thing at a time . . yeah?

Oh yes . . from the Title of this thread I really felt sure you had already completed your project and were now at a very serious juncture - funny that . . . seems I got the "Cart Before the horse" - no worries, let's see if we can get a further understanding, so we all can learn from your "experience".

Regards,

Grazie
farss wrote on 8/20/2003, 2:48 AM
The DV spec does permit the audio to slip a little out of sync but if it's constantly out then its not that issue, mind you 2 to 3 frames isn't a whole lot but its easy enough to fix, just unlock the audio and video and slide the audio along until you're happy with the sync. Did you use a clapper board to check your sync against?

Also bear in mind if you're 40 feet away from a sound source then you're going to be out one frame.
Grazie wrote on 8/20/2003, 4:38 AM
Yes farss, I agree - but I wanted to hear from ZG that he had OR hadn't the effect outside of V4 first, before we went down that route - yeah? And yes, playing with the VID<>AuD split would be an option.

Otherwise excellent advice, esp. the 40' foot distance!

Grazie
farss wrote on 8/20/2003, 7:38 AM
Actually thinking about the issue again I don't see how any capture program can change the sync between the audio and video.

One thing that could throw you off is that the video and audio goes down different paths during preview, I think you can dial in an offset in VV to compensate. Whatever does the external D/ A for preview must have a one frame delay at least and most sound cards have a fair amount of delay as well.

Thats why you need a clapper board, that and how can anyone take a shoot seriously without one :)
Grazie wrote on 8/20/2003, 8:09 AM
Offset . . interesting . . . I think you may be onto something . . . .

Grazie