One of the Logitech Webcam C270 HD cameras in OBS Studio sometimes freezes

[Norrest]

The PC(ACER laptop) is powerful enough. If you connect any other instead of one of the cameras, then there are no problems
The PC load is in the region of 2-3 percent. This is not a stream, but a video recording. Freezing occurs in the region of 40-50 minutes. Power saving, including disabling USB ports - disabled.
I tried to roll back the driver on one of the cameras, after which it is displayed differently (USB camera), but this did not help
Windows 10, Core I5 10 gen, 16 DDR4, nvme 512 GB.
I also tried to connect cameras via usb type c HUB, but alas ... one freezes.

 

[Lawrence_SoCal]

Have you looked into USB Root Hub contention? or maybe a BIOS update?
Your CPU may be fine, but Acer may have gone cheap or messed up something with the USB Root Hub controller/chipset
Se discussions about making sure you spread load across USB Root Hubs if possible

USB Root Hub related

1) Download USB Tree View from https://www.softpedia.com/get/System/System-Info/USB-Device-Tree-Viewer.shtml
2) Install and Run it on your computer

3) Check for the number of USB Root Hubs available
4) I think limitations of number of cameras is a limitation of the USB bandwidth that can be supported by each USB Root Hub
5) Unfortunately for me, the first USB Root Hub does not have any physical USB ports. Part of the NVIDIA video card.
6) Each USB Root Hub can safely support 2 Full HD (1920x1080) videos plus some USB 2.0 stuff like mouse, etc
7) The camera app by Windows works for all cameras even when overloaded is because it only activates one camera at a time. On the other hand, OBS runs all camera simultaneously

 

[Norrest]

Acer Swift 3 SF314-41-R1EL (NX.HFDEU.006)

The laptop has an excellent USB Type-C. I used an additional USB hub STLab USB 3.1 Gen2 Type-C - 4 USB-Type-A ports, with a 2A / 5V power supply to connect both sound cards and a DJ mixer to it .. Everything works stably for hours! It is when you connect two identical cameras that one of them freezes. Probably the problem is in the same Device ID in camera, I can't say for sure.

 

[Norrest]

There are also freezes even when I connect one camera to USB 2.0 and the second to USB 3.0, but if the cameras are different, then there are no problems. If there was a problem with bandwidth, it would not work for 40-50 minutes.

 

[konsolenritter]

How could you rollback the driver for just one of the cameras, if they are identical and deliver same vendor and product ID?? oO

 

[Norrest]

There are two of them in the device manager, surprisingly one rolled back. Here is from the device manager. These parameters are identical.