Audio / Video Sync Problem

[GT Music]

My sound card died after several years of use and I just replaced it with a Creative Sound Blaster Audigy. My problem is after capturing with Vegas 6 the audio is late by quite a bit.
Can any of you Gurus of Capture help with this situation? I'm not sure what additional info you need from me to help solve this. So ask away and I'll do my best.

Thanks in advance

GT

[Barnabas]

If the audio is late, you are droping video frames. Are you capping and encoding on the fly?

[GT Music]

No frames are dropped. And as far as encoding on the fly, I'm not sure what your asking. (please don't beat me up!!) All I do is capture and the file is automatically saved to a folder of my choosing. Again this capture is done through Vegas 6. I also tried it last night with Video Wave software and it too has the same results. For the time being all I can do is split the audio and video in Vegas and re-align them on the time line.

[Barnabas]

If the audio is a late, then you ARE dropping video frames.

What is the file extension that's being written as you cap? AVI, MPEG? If it's not AVI, then you care encoding/compressing on the fly, and your machine is not up to it?

What's the source? Is it video tape? Video tape frequently causes sync issues do to dropped frames.

What capture device are you using?

[GT Music]

I just tried another sample capture in Vegas and the audio now matches the video. MMMMMMMMMMM!!!! Some kind of quirk! Anyway, thank you for you help Barnabas, in the future I will watch for dropped frames. Question!!! These tapes are at least 10 years old and still look pretty good (I'm playing them throught the same camera that they were recorded on)
Can the age of these tapes cause the dropping of frames?

Thanks again

GT

[Barnabas]

Magnetic tape erases itself slowly over time, so yes, that's likely part of your problem. A TBC (Time base corrector) would help prevent sync issues.

When you encode stuff on the fly, and video frames are lost, the capping software will (pad) the file to keep things in sync, so when you view the original file, it's in sync, but as soon as you start to work on it, cutting or authoring it, the padding is lost, so it's no longer in sync. Since video frames have been lost, the video is now shorter than the audio. Usually, it starts out in sync, but goes out as later more and more.

[GT Music]

Understood ..........!

Thanks

GT