Question / Help Problems with viewing the cameras

[Andres Ariza]

I have the following problem, I have 4 logitech c920 cameras and only 2 are shown to me.

When I create the scene and proceed to add the cameras, I have no problem adding the first 2, when I try to add the 3 I have the image of the camera in black. It should be noted that when I configure the 1 camera and visualize all 4 cameras in the dialog box, in devices like the following image, I can see the image that each camera generates.

 

[PinballUndesirables]

You're most likely running out of USB bandwidth. Computers have 1 or more USB buses and each bus typically has a few ports. You might be able to solve your problem by plugging the cameras into different ports to hopefully get them on different buses. You can use the tool here: https://www.uwe-sieber.de/usbtreeview_e.html to get a better view of what's plugged into what bus. Alternatively, you could try lowering the resolution and framerate of each camera so each one uses less USB bandwidth. I use two C922 webcams and an USB HDMI capture device. I can't run the C922s at 720p60 if they are on the same bus, so I run them at 360p30 and make sure the HDMI capture device is on a different bus.