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Re: multiple webcams via one linux box

On Fri, Aug 23, 2002 at 10:06:40AM -0500, Bernie Berg wrote:
> Hi, I have a project that could potentialy have 85 webcams.  The easy 
> thing to do would be to use an Axis network camera and just link to its 
> own webserver from my linux web server (or whatever).  But these run 
> about 300 bucks, that would be about 25 grand for 85 cams.  X10 on the 
> other hand (I hate  their website, it looks like to is from 1994), has 
> much cheaper cameras, and they are wireless.  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 can't have more than 63 devices per bus.

But the main question is, do you want to handle real time video from
each of the cams, all simultaneously, in which case you'll have
serious bandwidth problems, starting on USB ?

If it's just a matter of taking a snapshot every few seconds, or using
only one video feed at a time, the usb solution might be ok (as long
as you have at least two buses to connect all the cams). There might
just be a few nasty constants in the device drivers, which should be
fairly easy to deal with.

Nicolas Bougues
Axialys Interactive

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