[AG-TECH] Multiple USB cams with AG3/Win

monika.k.rabarison at ccaix.jsums.edu monika.k.rabarison at ccaix.jsums.edu
Wed Mar 8 10:01:35 CST 2006

I just did a similar test on AG 2.4 (did not have a chance
to try on AG3 yet)with 1 Sony on Hauppauge and 2 QuickCams
on USBs, on Windows XP. I don't see any difference in the
frame rates(JSU streams on attached picture). 

The deal is, randomly one of the camera starts to display
for vic when entering a venue, the other 2 vics request a
selection of the video device. If the Sony camera does not
display yet, it is easy to select the "Hauppauge WinTV
Capture" as the video device for the 2nd vic. The problem is
that it seems there is no way to know which one of the 2
"Logitech Quickcam Pro 4000" to select in the dropdown menu(
pic attached)for the 3rd vic. If I am "lucky", I get the one
that is not in use yet, and life is great. If not, I get a
runtime error, and the 3rd vic exits.

Any idea to handle this (in AG3)? Any way to tie each camera
with a specific vic by default on Windows?


> The performance problem is likely the usb bus. You might
> have to switch usb connectors to get a different usb root
> device to get the best bandwidth, but this is great news
> for folks with 8 ports ;-)
> --Ivan
> > -----Original Message-----
> > From: owner-ag-tech at mcs.anl.gov
> > [mailto:owner-ag-tech at mcs.anl.gov] On Behalf Of Thomas
> > D. Uram Sent: Tuesday, March 07, 2006 1:55 PM
> > To: ag-tech
> > Subject: [AG-TECH] Multiple USB cams with AG3/Win
> > 
> > 
> > The question came up today about use of multiple USB
> > cameras with AG3 under Windows.  I tried it today, and
> > it worked: 
> > http://www.mcs.anl.gov/~turam/AG/vicWith2USBCams.PNG
> > 
> > A Logitech Quickcam 3000 and a 4000 looking at each
> > other (yes, the one stream is duplicated).
> > 
> > Note that the framerate on one camera only got to 10fps;
> > I didn't look into that at all.
> > 
> > Tom
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