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| super_copy |
| Posted: Nov 13 2013, 09:59 AM |
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Newbie
Group: Members
Posts: 7
Member No.: 25509
Joined: 6-May 09
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Hello,
I've been using VirtualDub for almost 10 years, to capture and digitize video from analog tapes. Just recently I had to update my setup from Windows 2000 (where everything worked fine) to Windows XP (clean install, not upgrade), but using the exact same machine, and now I have a problem: no matter what I tweak or configure, all captures end up being frames filled with a light green color. That is to say, the whole image is a green rectangle, without any detail of the video image I was feeding into the capture card.
More interestingly, I can see the incoming video signal fine using the Video "Overlay" option (so cabling and connections are good). However when I switch to "Preview", the image becomes solid green, and sure enough that is what gets captured (indicating a software problem).
First, the setup:
Capture card=Nvidia GeForce4 Ti 4800 with VIVO (Philips capture chip)
Windows XP with SP2
DirectX 9.0C
HuffYUV 2.1.1
Things I've tried...
Versions of VirtualDub: 1.7.8, 1.8.8, 1.9.11
Change video capture driver: Nvidia WDM driver 1.08 and 2.26 (the latest in existence)
Capture with all preview modes: no display, overlay, preview
Capture to two different hard disks, while monitoring CPU usage. I have no performance bottlenecks.
Compression modes: "no recompression UYVY" and HuffYUV
Capture resolutions: 640*480 and 320*240. The capture card only supports UYVY color space.
The only thing I am loathe to try is to downgrade my display driver Forceware 93.71 (latest in existence) to 43.52 (which was what I had under Windows 2000). Unless someone knows there was a bad hidden interaction in Nvidia's software, I figure the display driver should not interfere with the capture driver.
I am at the end of my wits. Ten years using VirtualDub without problems, and now boom, capture stops working with Win XP.
Anybody can shed some clues? Thanks! |
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| phaeron |
| Posted: Nov 17 2013, 10:40 PM |
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Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
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There can be interactions between a capture driver and display driver, and in this case it is especially possible since they're on the same card and likely share a lot of the same driver code. I would especially be wary in this case because video capture was never a major focus of the video card vendors. I would actually try downgrading the video driver first, since it's something that you definitely know changed -- it's not that bad to switch.
Other things I can think of: try switching to another raw video format like RGB, if supported, and if you are using the Microsoft Image Capture driver, switch to the direct DirectShow driver entry.
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