Thanks Derek .. I was using GEM already and that was my original problem, because I wanted to have multiple GEM windows open to show all 3 Cam's at once in one instance of PD ..
I'm using the webcams to detect motion and supply XYZ coordinates to a scanned synthesis patch ... I've attached a shot of the motion detection patch to make things clearer ..

Dave

On 8/7/07, Derek Holzer <derek@umatic.nl> wrote:
Linux uses a different device structure (Video4Linux) for video input
than OS X, so [pdp_v4l] will never work.

In short, Linux users can access a USB camera with [pdp_v4l], but not a
firewire one.
OS X users can access a firewire camera with [pdp_ieee1394], but not a
USB one.

If you use GEM on OS X, you can access either. You might need the macam
drivers to use the USB camera:

http://webcam-osx.sourceforge.net/

best,
d.



David Divilly wrote:
> Thanks Jack ..
> Had a look at [pdp_ieee1394] .. but all my webcams are USB ..
> what I really want to know is what object will allow me to open these
> webcams like  [pdp_v4l] (for linux) in OS X .. as per Example13 in the
> browser ..

--
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 106:
"Look at a very small object, look at its centre"