NTSC format is in use in USA, Canada, Japan and some South-American countries and if You live there You must use NTSC format - we use PAL here in Europe.
What capture software You are using? You can adjust Brightness, Cotrast, Hue, Saturation and Sharpness in Ulead and there is not possible to adjust gamma when You capture
videos and it is not even greyed there. I looked also Amcap and there was these 5 same settings that You can adjust and there was also greyed Gamma, Whitebalance and background light.
So these seems to be features that You cannot adjust with these devices at that point when You capture video. But there is gamma in Ulead Video Studio 10 when You edit
ready video clips - You will find it from here: Edit/Video/Color Correction.
More information, drivers and sample vids from my Youtube channel:
http://www.youtube.com/user/EasycapExperttihttp://easycapexpertti.mybisi.com/http://www.szforwardvideo.com/product/Pro_35_6.html