Audio Sync Loss w/Virtual VCR

[rkr1958]

Here's what I did: I captured a 3-hour special from the History Channel through my TV Tuner card (AverMedia) using Virtual VCR 2.69.6252 w/Huffyuv v2.1.1 (YUV2 720x480 @ 29.970fps (NTSC)). Because I was going to use TMPGEnc DVD Author w/AC3 plug-in to author (after encoding the video using TMPGEnc Plus) I captured the audio at 48KHz instead of the default 44.1KHz. I did the capture in three 1-hour segments.

My audio drifted behind and out of sync of my video. Fortunately in setting up the capture I check the box that gave me the capture stats. The audio capture rate listed for all three segments was around 48008. When played at 48KHz this resulted in a audio drift (behind) of 0.66-seconds per hour. I used Goldwave Timewrap to fix the audio and get it back in sync.

This was my first capture with VirtualVCR. Would I have this problem if I had stayed with the default 44.1KHz audio capture rate? After I spent a couple hours figuring out what had caused the audio to drift is isn't a big deal to fix now, but is there anyway to keep it from drifting if I want to capture at 48KHz?

[NamPla]

I capture with VirtualVCR using 48kHz PCM audio, and with "dynamic audio resampling" checked - no sync troubles (mostly)!

You could try disabling the "resample audio" & see if that's better for you.

I was capturing an NTSC tape the other day & the audio sounded slowed up & WAAAY out of sync. So I checked "Video Master Stream" & tried that, & got it to work. I'm still wondering what went wrong there...

Try each option, is my advice.

[rkr1958]

I capture with VirtualVCR using 48kHz PCM audio, and with "dynamic audio resampling" checked - no sync troubles (mostly)!

I just checked my capture options (under the AV Sync Tab). I have Resample Audio UNCHECKED. Maybe that's my problem. (I assume that's the same as what you've listed above?

[NamPla]

Yep, 90% of the time I'd say you should have this checked.

AV Sync/Resample Audio (ticked)/Resample Audio Dynamically (checked)...

I also capture my audio compressed (PCM 1536Kbs/48kHz/stereo)...