Capture Cards

Capture Cards either come with a WDM driver or a proprietary API. In the first case simply use the VideoIn (DShow9) to access them, in the second case you'll have to write your own plugin in order to to implement the API.

Blackmagic Design DeckLink

• DX11 BlackmagicDesign Decklink VideoIn by NSYNK

Legacy

For (legacy) analog capture cards based on a bt878 or compatible chip this common WDM driver is available:
http://btwincap.sourceforge.net/

See also:

• List of Capture Cards