for I in /sys/class/video4linux/*; do cat $I/name; done
VIDIOC_S_FMT:failed:Device or resource busy
VIDIOC_S_PARM:failed:Device or resource busy
一个摄像头为什么两个设备号?
for I in /sys/class/video4linux/*; do cat $I/name; done
VIDIOC_S_FMT:failed:Device or resource busy
VIDIOC_S_PARM:failed:Device or resource busy
一个摄像头为什么两个设备号?