摄像头设备号问题

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?

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转载自blog.csdn.net/gloriazhang2013/article/details/86639730
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