Hello,
i could help you there, you need a programme such as Image Salsa, available here: http://www.imagesalsa.com/support2.htm
This will create a series of still pictures on your computer from your webcam ( which could be a good old camcorder linked to laptop via a frame grabber, such as a pinacle dazzle ) You could use any cheap usb cam, you would be surprised what weather they can put up with: http://www.ebay.co.u...=item2ebc0706dc
Then you need another pogramme such as Movie Salsa available here: http://www.imagesalsa.com/MovieSalsa/
both programmes take a lot of learning, but are very well written and are infinitely variable. There might well be simpler alternatives out there.
I shall set one up myself on the boat one day soon, already have one at home and four at our sailing club.
cheers, David