Virtual VCR, audio synch problem

[Bizuser]

Through various posts on this forum, I learned about Virtual VCR, which is the only capture program I've heard of that has a built-in method to force the audio in synch- it dynamically re-samples the audio to maintain the rate exactly. Sounds great, and at least two users on posts I've read say it does great.

I've been using VirtualDub with various codecs (MJPeg and Huffyuv), and getting 'good' results - but not perfect. On a 20 minute capture, at 480x480, I get the same synch all the way through, and it's pretty good. What I've noticed, though, is that the audio and video are not perfectly in synch. Neither ahead nor behind, consistently, just a tad 'sloppy'. I've been recording news shows (eg CNN) so I get lots of talking heads to watch (as a test - I wouldn't dream of recording CNN!). Maybe I'm expecting too much!

So I downloaded VirtualVCR, with great anticipation. Unfortunately, I get real bad synch using the recommended settings:

Proper settings under the AV tab are:
* Check: Resample Audio & Resample audio dynamically
* No Check: Adjust Stream Offset

The synch will start out Just fine, then very quickly drift by a second or so. Does not get worse towards the end. Definitely starts out good (first few seconds!).

My system is pretty decent - P4 1.6GHz, 512 Meg, ATI AIW Rage 128 (with Rage Theater), onboard soundcard on the P4B533 mobo, so I don't think it's system related. ALso, Win 2k, sp 2, directx 8.1.

Anyway - I'm probably doing something stupid. Any other users of Virtual VCR who have had problems, and then solved them?

I also just saw a 'mod' version of VirtualDub - with what sounds like the same synch routines/concept used in Virtual VCR. Anyone tried that?

Thanks everyone!

[paulgab]

I'm also using VirtualVCR for TV capture, same setting "resample audio dynamically" as you've mentioned, have no problem at all. I only have A/V sync problem w/ VVCR when capturing from old/worn VHS tapes. But with cable TV as source, A/V is perfectly in sync w/ slight deviation in some portion of the capture, overall, its perfectly acceptable.

If I cant get VVCR capture old VHS w/ the A/V in sync, I instead capture using UVS6
MPEG2 w/ the highest data rate my rig can take. usually 8500 ~ 9000 kbps and the A/V is perfectly in sync.