VirtualDub Capture AVI audio AND video speed up

[dogpapa]

Hi, please forgive the newbie post but I couldn't find anything about this particular problem anywhere.

I'm trying to capture VHS from VCR RCA outs with a Belkin USB VideoBus II (model # F5U208) to AVI files using VirtualDub 1.9.11, and without even getting into sync problems, the resulting AVI files start out fine, but both audio AND video soon start speeding up together, gradually, to the point that a 4+ min song results in a 2+ min file, with sound and picture racing at the end.

I've used this exact Belkin device years ago on an older computer with Win98 and had no such problems (except for perhaps poorer quality due to the slower processor). Here is what I'm using now:

Dell Dimension B110, Celeron D 2.53 GHz, 2GB RAM, Win XP SP3, Belkin's own XP drivers, and they are listed under Device Manager > Imaging devices (video) and Sound video and game controllers (audio) which is correct per Belkin's installation instructions.

In VirtualDub, Capture AVI, Device = USB VideoBus II Video (DirectShow), and Audio = Capture Device. The frame rate defaults to 30.00 fps, and audio to 44.1k 16-bit.

Any ideas? And if it's possible the Belkin device simply doesn't work with VDub, what capture program would you suggest? (I prefer bare bones & functional to fancy UI's and features)

THANKS IN ADVANCE!!!

[mammo1789]

I'm trying to capture VHS from VCR RCA outs with a Belkin USB VideoBus II (model # F5U208) to AVI files using VirtualDub 1.9.11, and without even getting into sync problems, the resulting AVI files start out fine, but both audio AND video soon start speeding up together, gradually, to the point that a 4+ min song results in a 2+ min file, with sound and picture racing at the end.

Hi dogpapa first i dont want to scary you but I think that that "tv card" is some generic tv card and as you mentioned ( you used it on win98 ?! (does anybody uses that still) it worked well for that old system but it may have problems with the new one meaning XP.

Second most of those usb tv cards have more inferior chips inside ( most of them old) than the pci or yet more, pcie tv cards that have more components, and due to the space of the card more stable and with less interference input and output, although some will debate that inside tv cards have to deal with the "noises" from the pc itself.

Third the majority of sync errors happen when there is no TBC in the chain ( usually full frame or better yet more cheap and still functional for syncing signal some DVD recorder from the 2003-2007 era from JVC, Panasonic, Pioneer,Philips,Toshiba) to stabilize the signal because you got probably drop/inserted frames
in to the capture that you may not see it first.

Fourth best capturing setup in Vdub is to set the correct resolution, colorspace ( like YUV2 for example not RGB and codec for capturing like lagarith,UT or hyff. You shouldn't use compressed format like mp3 for audio it has to be wav( less problem for syncing between streams ).

Fifth in virtual dub there is setting ( picture bellow) "timing" where you can try different settings to see what gives you better results.

Try not to do other things while capturing like surf the net and or play games, and you can shut off programs or service's that you don't use it often.

Defragg the HDD where you will be recording.

I later saw that you didn't mentioned what vcr are you using svhs will generally give you better picture and if you try to find one like Panasonic ag1980 or jvc hr 9800 they use TBC and DNR at can help you a lot with the captures.

[dogpapa]

HI, thanks for the quick reply! I went into Capture Timing Options and noticed Resync Mode was set for Sync audio to video... As soon as I changed it to one of the other settings (Do not resync... or Sync video to audio...), the speeding up problem stopped! I'm still not sure which of those are best, but I left it on Do not resync... so I can concentrate on getting the other settings right without Vdub doing any resyncing.

Now the only problem is that the video is consistently behind the audio. I've tried a few different Audio Latency Determination settings (Automatic > Number of audio blocks... 0 - 120, Fixed > Audio start time... -500 - 500) but none of them seem to make the audio later to match the video (which may be because I'm having video latency, not audio). I'm guessing I could reopen the captured file and resync the audio, but I'd rather get it right in the capture stage, if possible. Any suggestions here?

[dogpapa]

Kind of answering my own question here -- I read up on the Audio Latency Determination function and I don't think it can be used to change the position of audio to video, or at least I couldn't get it to. So, I wound up setting it back to the default setting Number of audio blocks... 30, captured the file as-is, then reopened it, and used Audio > interleaving > Audio skew correction > Delay audio track by 350 MS, and the result is as close to perfect as I can get! Stays in sync the whole song too.