very annyoing Lines when previewing and capturing!

Hello Fellaw, Those lines. They're horrific! Do they come and go? Can you test this: Do you get more lines get when you increase the capture resolution to 720 x 576 (720 x 480) or even 768 x 576 (480)? If you capture in 352x288 (352 x 240 for NTSC), do they go away? What color space are you using? I get similar looking lines when I capture in RGB24 color space. When I select YUY2, they go away. I tested this with Amcap. /Swan

There only appear at resolutions higher than 352x288@pal or 352x240@ntsc. When I'm watching non-interlaced source material, e.g. movies from the 80's, they don't appear. I'm capturing in YUV2 colorspace. If I switch to RGB24 or RGB555, they even get more! This must be a interlace issue with that avi decompressor in my capture graph! I wrote M$ to fix it, no answer till now.

Oh boy! I get a clear, nice line-free image with YUY2 at least. But that changing the color space makes it worse is interesting. It's likely then that the problem you're having is related to that. Hmm.. What version of DirectX are you using? But, if you capture/watch TV at full res, you will see interlacing lines. That's normal, unless you use a capturing software that performs real-time deinterlacing. I guess you already know this. The lines on your screen shot does not look like interlacing either. I'd love to know how to build a capture graph in Graphedit! Can you capture that way? I understand if you don't have the time to tell me, but perhaps you have an URL to share where I can read about what to insert into the graph? /Swan

This is what my lines look like: I get them when capturing in Ulead Videostudio. After installing Btwincap drivers, I cannot select anything but RGB24 and the captures then looks as the ones on the screen shot. The lines disappear for me if I select YUY2. I can only do this in other softwares, not in VideoStudio. I tested with Amcap. Capture 720 x 576 in RGB24 = lots of lines Capture 720 x 576 in YUY2 = No lines /Swan PS Thanks for the Graphedit tips. I got it working right away. :)

Hello again. I agree with you that pci bandwith is not your problem, but my diagnosis is sort of right anyway. I know knothing of graphedit but obviously sticking the smart tee and avi decompressor slows the transfer of data from capture input to the destination capture software. Surely a bottle neck is a bottle neck. My original capture problems had EXACTLY the same symptoms and my bottleneck was the pci bus, yous appears to be too much filtering prior to you capture application. The solutions? Buy a tv to watch while you capture. Get a faster cpu. These are rubbish solutions i know but i feel that is all you can do. If i tried capturing with vdub in rgb and had a smoothing filter on and complained of these lines i would be told 'stop using the filter or get a (significantly) faster cpu' - i think this analogy holds. If you can sort it out another way i would be interested to know - good luck anyway.

Hi again. Just had another thought - everyone is mentioning either rgb24 or yoy2 colourspace - are you trying to capture raw with these???? No wonder you can't empty that buffer quick enough!! Just try capturing with Huffuv - it is lossless after all! If you've already tried this - sorry. See ya.

When capturing with virtualdub(_sync), going to the second menu from the right, down to the bottom "direct draw acceleration", select "both fields". This makes those lines go away for me. Regards, Koepi

I used to have this, was caused by CPU cooling program(s). Turning off all the features during captures stopped them for.

Maxi: Good cause, I'll give that a try.

Have you tried at Capture->Disk I/O to increase the chunk size?? I had the same problen and when I increas it 4MB+ and 4 chunks in buffer(can't remember exaclty) it solves the problem... MoonWalker