Welcome to the justanswer chat support.
•Computers typically have between 2 and 8 USB controllers.•A USB controller can be:-reserved for a device inside the computer-linked to a single USB plug on the computer-linked to many USB plugs on the computer•There are no labels on USB plugs to indicate to which controller it is linked.
If you want to connect many cameras on a computer, you may need to spread the cameras over the available usb controllers. You. Can do this by experimenting; connect the webcams on different USB plugs until it works.
Another way to do it is by manually map your USB ports. Here is how to do it:
1.Start your webcam software, make a webcam active.2.Go to the Windows Control Panel, the to the Device manager.3.At the bottom of the device list, you'll find the USB controllers. There should be a few.
4.Right-click on a USB controller to see its Properties.5.In the Properties window, go to the Advanced tab.6.Check out the Bandwidth Used section, this will give you a clue if the webcam is connected on a USB port bound to this controller.Using this technique, you can see which devices are using which USB controller's bandwidth, so this way you can map the USB plugs and have a better idea of how to spread the webcams across all USB controller.