The situation is this,
I need to record from a camera (computer connected) from a 'trigger' for a short amount of time (10 to 20 seconds), the clip is saved and replayed about 10 seconds afterwards onto a monitor.
The 'trigger' I do have an idea on - I know of a bit of hardware that has inputs and outputs so I could 'trigger' a script/programme/whatever using some visual basic script. But thats just my first (and currently only) idea.
Oh yes, and as usual something that has as little cost as possible ;-), I'm sure I could find some way of thanking anyone who can help.