V4L2摄像头

V4L2摄像头

[video4linux2,v4l2 @ 0xaaaae665b650] Not a video capture device.
/dev/video0: No such device

ffmpeg -t 10 -s 640x480 -r 25 -i /dev/video0 -vcodec libx264 -b:v 4000K out.avi

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