Audio sync issue even when dynamically resampling audio

[purpleman]

Hello everyone.

I've posted before, thought the matter was fixed, but it wasn't.

I'm capturing using a WDM card (Leadtek Winfast TV2000 XP Expert) from an 8mm video camera (equivalent to VHS I think, slightly better).

Whenever I cap more than a couple of minutes, the audio is gradually getting out of sync (significantly).

I have a very strong box (Core 2 Quad Q6600, 4gb ram), and I'm capping 720x576 PAL to huffyuv. The PC has no problem keeping up with the data rate or the cpu demand, so that's not the problem.

The audio is connected to my on-board sound card (motherboard: Gigabyte P35-DS3L).

I tried VirtualDub 1.8 and VirtualVCR, both *with* the "dynamically resample audio to sync to video" option checked, but it won't solve the issue.

in VirtualDub 1.8:

[ ] drop frames when captured frames are too close together
[x] Insert null frames when captures frames are too far apart (Null frame burst limit: 10)

(*) Sync audio to video by resampling the audio to a faster or slower rate

[x] Correct video timing for fewer frame drops/inserts
[ ] Automatically disable resync when integrated audio/video capture is detected.

Audio latency determination: automatic

Directshow options:

[ ] Use audio timestamps when available
[ ] Disable timestamps for preview
[x] Force audio clock when audio playback is enabled

-----

In VirtualVCR - not that many options. in A/V Sync I chose resample audio.

Any idea?

What else can I try? What could be causing this?

Any help would be appreciated. Thanks in advance!

[Midzuki]

Try this:

1) compress the audio with a WMA codec,
which natively supports variable sample-rate;

2) use Winamp's NullSoft Disk Writer
{ https://forum.videohelp.com/topic346029.html#1814650 }

HTH.

P.S.: Ever thought~of/tried doing without the options
"drop frames" / "insert frames" / "dynamic audio resampling"

[purpleman]

Why would I do it without any of the syncing options?

Everything I've read says that's a big no-no and will casue syncing issue for sure.

[Midzuki]

purpleman wrote:

Everything I've read says that's a big no-no and will casue syncing issue for sure.

Fortunately or unfortunately, each case is a case.
What about "everything you have experimented"
Maybe you should have at least one of the sync-ing options turned-off,
principally because you hardware appears to be decent enough.

[themaster1]

Try a 32khz sampling rate instead of 44khz to begin with (w/o "resample audio" enabled) in virtual vcr

I now use a software called fly 2000 tv and that's what it does* record in 32khz/use microsoft pcm codec and i nomore have sync issues.

Take a look:
http://img216.imageshack.us/img216/9763/image1pa6.gif