From the Terminal
V4L2 Notes for Linux
Find out what is using capture devices
fuser /dev/video0
Find out name of process
ps axl | grep ${PID}
Show info
v4l2-ctl --all
Set resolution and frame rate
v4l2-ctl -v width=1920,height=1080 --set-parm=60
v4l2-ctl -v width=3840,height=2160 --set-parm=30
Reset USB Device
usbreset "Live Streaming USB Device"
Show Stream in GUI
qvidcap