Hi, On Wed, Oct 16, 2002 at 03:10:47PM -0400, Bob Lockie wrote: > I'm confused why v4l knows which USB devices are video devices. > Is the ID's of my webcam in the v4l driver?
I don't really know. There are two possibilities: Either the USB driver of your camera knows all the ids that it can support. Or there is a generic driver that supportes all the USB devices of one class. The problem with the USB scanners is that ther is no galg "I'm a scanner" like with SCSI scanners. That's the reason why sane-find-scanner can only guess, if it uses libusb to access scanners. It does things like "If it's not a hub and not a keyboard and not ... it is possibly a scanner". The other way is what is donner in scanner.h: list all known devices. Bye, Henning
