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