Virtual Dub 1.5.1 and brightness problems

[apollo1980]

Hi all.

I am using Virtual Dub 1.5.1, and have been for some time.

Using Windows XP.

I have an nVidia Geforce 4 TI 4600 card with TV in.

I have grabbed video without problems in the past, save one. huffyuv 2.1.1 codec.

Where there is a lot of white (i.e. a hockey game for example, where the ice is white), the picture looks very bright. I have tried to use squish luminance range, but it doesn't help.

Messing with contrast, hue, saturation, and brightness don't help. Again, all video images will look great, except when the screen is dominated by white, then it looks washed out.

Is there something I can do to resolve this problem?

Thanks in advance.

[SaSi]

Looks like you need a gama correction filter for the capture. And perhaps to fine tune your Video In settings on the Video card.

Look for the various filter sites (or wait for another, more helpful response) for a gama correction filter.

Last time I needed this, I converted the video sequence to .jpg and then used a picture management application (thumbsplus) to batch convert the gamma of the frames.

[SatStorm]

Your final DVD/etc has colour wash out problems when you playback on TV?

[stahlhart]

I'm still fine tuning this issue myself. I'm consistently seeing increased brightness, slightly lower contrast and weaker color if I tune the settings to look "correct" on my PC.

I've pretty much gotten the brightness and contrast issues resolved -- it ends up looking dark with too much contrast on the PC -- but I'm still working on the color setting. Looks as though I run into color bleeding/tearing problems if I push it too hard, particularly on red and, to a lesser degree, yellow. I seem to get better adjustment response from the capture filter in VirtualDub than I do from the video settings on the AVT-8710, so this is where I'm focusing the effort. I'm guessing that there are limitations from my VHS source that are constraining me.

Capturing uncompressed AVI from AIW via VirtualDub 1.6.4, HuffYUV 2.1.1, frameserve to TMPGenc 2.54 and encode MPEG-2 (AC3 audio encoded separately and merged afterward).

I haven't tried experimenting with gamma yet; may just do that to see what results I get. I did attempt plugin filters in VirtuaDub, but my results with these were worse than without, so I've gone back to unfiltered capturing for now (well, unfiltered except for the brightness/contrast/saturation/hue settings).

C.K.