On Wed, 17 Sep 2008 08:42:57 +0930, Iain Buchanan wrote: > > You can also use standard composite output security cameras, > > connected to a TV card with a composite input. > > except that you then have to provide power to the camera as well, and > composite is pretty bad at interference over long distances, especially > if you're running AC next to it!
The ones I've seen have a DC power line in the same cable sheath as the video, a 9V or 12V adaptor plugs into this at the computer end, so there's no AC anywhere near the video signal. > USB cameras put the reliance on your webcam drivers working, composite > cameras put the reliance on your TV card. And TV cards with multiple > inputs can start to get expensive, but most cheap motherboards have > multiple usb nowadays. http://store.bluecherry.net/4_port_video_capture_card_linux_bt878_p/pv-143na_oem.htm $44 isn't that expensive. How much would four USB repeaters cost, and even then you'd get less range. Neither option is the do-all solution, but there is a choice to USB that better suits some circumstances. -- Neil Bothwick Top Oxymorons Number 44: Advanced BASIC
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