iPi Recorder Issue with Multiple Logitech C922 Cameras
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Author:  C922 [ Wed Jul 19, 2023 5:52 am ]
Post subject:  iPi Recorder Issue with Multiple Logitech C922 Cameras

Hi Everyone,

Has anyone been able to connect two C922s to one USB3.0 port?
In my usage, two C922s must be connected to one USB3.0 port.

When I connect two web cameras "C922" to one USB hub and connect the USB hub to my laptop PC, "C922" are recognized.
However, I can't shoot simultaneously at 720p and 60fps.
With the iPi recoder, I get an error message "Insufficient system resources" and one C922 doesn't show anything.
(But if I set them to 720p and 30fps they can shoot simultaneously.)

The laptop PC only has a USB3.0 port, and the specifications of the universal serial bus controller are as follows.
・Two usb3.1 extensible host controllers - 1.10 (Microsoft)
・Three usb composite devices
・Two USB Root Hubs (USB 3.0)

As a result of trying different types of USB hubs (self-powered USB3.0 hub, self-powered USB2.0 hub, bus-powered USB3.0 hub), simultaneous recording was possible with the USB2.0 port of the desktop PC.
So my USB hubs are fine.

iPi Docs' "Cameras and Accessories" says:
"For USB 3.0, prefer active hubs which use an external power supply."

However, from these things, it is considered impossible to connect C922s to a USB hub and connect to a USB 3.0 port.

Is there a good solution to make sure two C922s are connected to one USB3.0 port? (such as operating a system with a USB 3.0 port)
If there are any specific products that have connected two C922s to one USB3.0 port, please let me know.
I think I need one of these two:
・USB hub
・Docking station with USB expansion card

Any advice or recommendations you could provide would be greatly appreciated.
Thank you in advance for your time and assistance.

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