Hi
I am using dragonboard to acquire video from a usb camera. I can’t stream from 2 cameras simultaneously. Which ever camera is opened first can be used to steam video while we never receives any frames from the other camera.
I am using libuvc and openCV to capture frames on debian 16.09 image.
The report is a little vague but the second camera may be failing to start because it cannot reserve any isochronous bandwidth on the USB bus.
If you have a buggy webcam that overclaims bandwidth you might find some clues here: Linux UVC driver & tools – FAQ
Also, if you have other peripherals on the bus try to disconnect as many other things as you can from the bus.
