Re: multiple webcams via one linux box
Greetings!
Bernie Berg wrote:
Hi, I have a project that could potentialy have 85 webcams.
[...]
> You can get a usb adabpter
to input them into a computer. Ummm, anyone have luck linking 85 usb
webcams into one linux box? Anyother sugestions?
USB has a device number limit per bus - and a cable length limit:
specifications limit it to 3m (9ft) max - usually recommended is to keep
the length below half of it.
Unless you need realtime video I'd suggest you get small video cams
(possible to get them for ~200$ each), relay them via a remote (i.e.
computer) controlled switch box and feed them into a standard video-in
card (e.g. BTT-based). I've seen switch boxes supporting up to 8
video-ins controlled via parallel port - so you probably will have to
build your own controller box. Using the parallel port and a number of
layered TTL b2d-decoders to trigger a transistor-boosted relais for each
input building that box should not be too complicated.
Bye
Volker Tanger
IT-Security Consulting
--
discon gmbh
Wrangelstraße 100
D-10997 Berlin
fon +49 30 6104-3307
fax +49 30 6104-3461
volker.tanger@discon.de
http://www.discon.de/
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