I've been reading with some interest some people's tests with newer cards designed for the security industry having 4 or more composite video inputs. We currently have a card here that has this using the Bt878 chip. Not being too familiar yet with driver coding I may be asking something that is not possible but here goes. Is it feasable in such a 4 input card to map each channel to a separate device - ie. /dev/video0, 1, 2, 3 and have the one driver handle all at once. Would such a driver allow "simultaneous" capture from all 4 channels - I suppose the driver itself would do some sort of internal switching... How would such a system handle non-capturing opens? Would such a system scale for other cards with PCI bridges and more than 1 Btxxxx chip and more than 4 inputs? Or, is this concept totally incorrect and the driver provides only 1 /dev/video0 per card - regardless of the number of channels on the card and the user app must handle the switching and channel management. Thanks in advance -- Brian Warkentin bwarkentin@xxxxxxxxxxxxxxxxx
