still image capture from video stream

[stan <stanb@panix.com>]

I;ve got a need to capture iamges at a rate of about 1 per second from four
locations, Two of thes locations will be new, so Ill use web cameras there.
Two however are existing and have industrial grade CCTV cameras, These
locations are also in a fairly hostile environment, so I want to re-use
these.

I'm thinking i can do this with a video capture borad, right? Which ones
are well supported under debian? I don't need ultra high resolutin, as a
matter of fact, gien the number of images that I'll be accumulating (4/per
second * 60 seconds * 60 minutes * 24 hours * number of days I need to
keep) small image size is very important. 

So, how about some pointers to docs on this? And some advice on hardware
would be welcome also.

-- 
"They that would give up essential liberty for temporary safety deserve
neither liberty nor safety."
						-- Benjamin Franklin