Question

opencv调用摄像头失败，出现以下提示，求解答，谢谢

VIDIOC_QUERYCTRL: Input/output error
HIGHGUI ERROR: V4L/V4L2: VIDIOC_S_CROP
OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in Mat, file /home/tanxue/opencv-2.4.13.5/modules/core/src/matrix.cpp, line 333
terminate called after throwing an instance of 'cv::Exception'
what(): /home/tanxue/opencv-2.4.13.5/modules/core/src/matrix.cpp:333: error: (-215) 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows in function Mat

Answer 1

我知道了，我一起也遇到过！是因为识别不了你的摄像头，重装一下驱动程序，问题马上解决！