I am using a library (librealsense) that only outputs the bus and port number as such (9.1). It uses libusb internally. The issue is from this identifier in libusb I want to know what physical device it belongs to in /dev/video0. For instance, 9.1 -> /dev/video0 and 7.2 -> /dev/video2 when two cameras are plugged in in ports 9.1 and 7.2.
Is this possible? How do I acquire what devices paths belong to a bus and port? Any partial answer would be helpful.