Audio Out Of Sync Problems

[Amaze]

I recorded about half an hour with huffyuy 640x480, and I used mp3 96kb as audio, after about 20 mins, the sound became more and more out sync...what can I do to prevent this? will it help to use another audio-codec?

and while I got a topic running, what prog is the best to use when encoding to xvid? I saw some other post saying that tmpgenc wasn't that good with xvid.....

[johns0]

I use virtualdub and it stays on sync all the time with `adjust video clock dynamically to match audio clock` checked in the timing.tmpgnc does fine for me and if i get any problems i change the header of the avi to divx with the 4cc changer.

[FulciLives]

I recorded about half an hour with huffyuy 640x480, and I used mp3 96kb as audio, after about 20 mins, the sound became more and more out sync...what can I do to prevent this? will it help to use another audio-codec?

and while I got a topic running, what prog is the best to use when encoding to xvid? I saw some other post saying that tmpgenc wasn't that good with xvid.....

Well I don't know what kind of capture card you have or how fast your computer is etc. but usually it is a bad idea to capture using anything otherthan PCM WAV audio.

If you plan on doing an Xvid then you probably should use 16-bit 48k Stereo WAV

- John "FulciLives" Coleman

[Amaze]

my computer is listed in computer details, as well is my capture card...

and how much extra space will wav add?

[FulciLives]

my computer is listed in computer details, as well is my capture card...

and how much extra space will wav add?

I see you have a VIA chipset on your motherboard. This has been a known audio sync problem. I think they have updated drivers for it. If I recall the problem is isolated (again I think) to built-in MB audio and not if using a seperate PCI audio card.

But try PCM WAV audio and see if that helps. It makes the file size much bigger but you can convert to MP3 audio while converting the video to Xvid and then delete the original capture so ... who cares?

- John "FulciLives" Coleman

[Amaze]

I got all the latest drivers...I'm just low on space right now, waiting for new hd...

I can't seem to use virtuadub though, I always get the 418 error when setting capture resolution, and I've seen it happen to alot of other people, has anyone solved it yet? for now I'll just have to use winfast pvr...

[Amaze]

also my mobo uses software audio instead of hardware audio, not sure what that means, but is it crucial?

[johns0]

Try different settings for your video format thru custom settings.640x480 is usually standard and change the data format to UYUY and see if that works,if not then try another data format,software audio is onboard and shouldnt be a real problem unless you are dropping frames cause of it being that it uses extra cpu processing power.

[Amaze]

no the frames are fine, it's just the audio going out of sync, I wish I could run virtualdub in more resolutions than 320x480...I'll try capturing with wav tonight to see if it's solves the problem, although I fear the space it'll take...how much would a minute of that wav-setting you suggested take up?

edit:
pcm doesn't let me chose bitrate though, is this normal?

[FulciLives]

PCM WAV audio has a fixed bitrate. You should choose 16-bit 48k (not 44.1k) STEREO WAV file.

VirtualDub really only works if your capture card uses VFW drivers but most capture cards actually use WDM drivers ... and when you use such a capture card with VirtualDub you can't capture past something like VCD resolution.

So if you are getting the resolution error it is most likely because your card uses WDM drivers. In that case forget using VirtualDub for capture.

Look into VirtualVCR or iuVCR or TheFlyDS

All three work well with capture cards that use WDM drivers which means of course no resolution restrictions.

- John "FulciLives" Coleman

[johns0]

Im using virtualdub 1.1.43 with wdm drivers and no vfw wrapper and it captures at up to 720x480.

[DRfrankenpimp]

in virtualdub open your capture window and then go to video...select custom format and see if you can change your resolution to what you want

[FulciLives]

Im using virtualdub 1.1.43 with wdm drivers and no vfw wrapper and it captures at up to 720x480.

I can't imagine how that is possible!

- John "FulciLives" Coleman

[Will Hay]

I second the VIA suggestion.
I never solved my problems until I switched to a motherboard with an SiS chipset.
Countless latency programs and patches never solved my VIA issues.
From my experience I'll never buy VIA again, not because they're bad (although they were for me in capturing) but because for me it isn't worth the risk.
I heard it affected older chipsets the most (KT133 for instance, if I remember correctly) but like I say, not worth the risk.
Will

[Leoslocks]

I am using Virtual Dub 1.5.10 on W2k and can capture at 720 x 480 from svhs tape. I think Direct X has a VFW wrapper included with the Direct Show part of drivers. I am using DirectX 9.0b.
I would rather use Virtual VCR but the color is all messed up.

[Amaze]

I downloaded the virtualvcr-mod for my capture-card...it said it found channels, but when I tried preview it failed....

edit:
got the preview working, but for some reason all the channels look scrambled...

[Amaze]

ok, I've hooked up the cable box through the s-video port to get hbo, but now all I get in virtualvcr is a blue screen, the sound works though...I get normal picture in winfast...

[zedstrange]

Im using virtualdub 1.1.43 with wdm drivers and no vfw wrapper and it captures at up to 720x480.

You are using Windows XP, therefore the wrapper is already installed.

Which drivers are you using, the IULab one or the BTWDM ?

If you are using the BTWDM then the higher resolutions work without a problem.