audio crackle when capturing

[inertiahz]

hi,
before i start this weird problem id just like to say i have searched the forum and tried some of the solutions to similar problems to mine but something is amiss. Anyways on to my problem:
Whenever i try to capture video using uncompressed .avi or using the Huffy codec or even straight to divx, i get a crackle in the audio. Now the strange thing is that i can capture straight to mpeg and the crackle is gone.
I can listen to the sound through the line-in and there is no crackle. I can even record just plain audio fine with no crackling. Its just when using .avi or variants of i think.

What im using to capture is:
Gigabyte GA-7VTXE+ (via chipset)
Leadtek Geforce 4 TI 4200 128mb VIVO (detonators 40.72)
Soundblaster Live 5.1
80g IBM Deskstar
XP 2000
OS = Win2k

Ok ive got the video coming through the composite video and the sound coming in from the line-in of the soundblaster.
Ive tried a whole load of capture programs Ulead, vdub, Avi_IO, virtual vcr and the VIVO application that came with the card. Ive updated all drivers.
Ive moved the soundcard to a different PCI slot, ive even tried using the onboard soundcard instead to capture but still the bloody crackling.

Im loosing my mind :confused:

So any ideas?

[McQuaid]

Something is probably hogging the pci bus on your motherboard.

Usually I would point to the SB card. There are known to cause such problems, but you've tried your onboard sound as well. Just curious, did you disable your soundblaster when you tried the onboard sound?
The only other thing I can think of thats fixed it for some people is installing the via 4 in 1 for via motherboards, that solved it for my friend.

[inertiahz]

yeah when i tried the onboard sound i completely uninstalled the SB and took it out of the case.
I have tried the latest via 4in1's still no luck unfortunately.

The thing that gets me is its just when using .avi and its varients. I can record audio seperately fine and even straight to mpeg the audio is fine.
Very weird.

[McQuaid]

Sorry I can't think of any other suggestions. Lots of people have had this problem, and it's a shame when spec wise you have a good system.

As I mentioned, my friend had this problem, and it was actually in all video playback. After undating his drivers and installing the via 4 in 1, it was gone in everything except that he has a dv camera and when playing back transfered files from his hard drive he still has the issue. But once he encodes them, the encoded file plays back fine so he just accepts it at that. Maybe try a google newsgroup search, or just as a test, install win98 as a dual boot system just to see if it happens there.

[dar1us]

I had some audio crackle the other day, but I soon realised it wasn't the capture at fault, it was the playback, after a restart, the crackle went away. I think it could be related to iCQ running, even if you are not connected. That was my problem.

[artful]

I believe this could be a problem with the VIA chipset. I have I hauppauge WinTV-PVR250 card with hardware mpeg encoder and there is a patch on their website for this very problem for M/Bs with VIA chipset. The patch is not produced by Hauppauge and is not unique to their product.

You'll find it somewhere in the support section - I don't need it because I don't have the VIA chipset but I just happened to notice it.

Something to do with Latency.

Link below for you.

http://www.hauppauge.co.uk/

You can get the file here:-

http://www.shspvr.com/pvr_faq.html

[inertiahz]

ok lots of things tried some success at last :)
Things ive tried since:
All drivers updated.
Tried differant detonator drivers.
Tried the latency patch.
Shut down all non essential stuff during capture and playback.
Updated to direct x9.

Any of that make one bit of difference? no :rolleyes:

However i did a fresh install of XP on my old 10g hard drive and it fixed the problem. So it looks like ill be starting again.
Although i have had some success in removing the crackles using cool edit pro.

So thanks for all the suggestions and think of me as i do the boring task of rebuilding :(