使用python修改V4L2摄像头的捕获图像尺寸
capture = cv2.VideoCapture()
capture.open(2, apiPreference=cv2.CAP_V4L2)#设置摄像头为V4L2
capture.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'))#输出图像为MJPG格式
capture.set(cv2.CAP_PROP_frame_WIDTH, 1920)#修改图像宽度为1920
capture.set(cv2.CAP_PROP_frame_HEIGHT, 1080)#修改图像高度为1080
