The Canopus ADVC-100 isn't like a 'conventional' capture card because all the analogue/digital conversion it does is completely separate from the computer, it's a standalone analogue to/from DV converter and doesn't have any adjustable brightness/contrast/colour/sharpness settings.

I'm using the German LDs for the bulk of my DVDs and the same post-processing brightness/contrast/colour settings works fine for all sides of all the discs, but when I patch the side breaks & intro with the French LD footage I find that yes I have to individually tailor the post-processing settings for each clip as one setting doesn't work for all.