OpenCV+python调用本地摄像头并录制视频

1、调用摄像头并录制视频

from cv2 import cv2
#捕获摄像头帧
cameraCapture = cv2.VideoCapture(0)
fps = 30
size=(int(cameraCapture.get(cv2.CAP_PROP_FRAME_WIDTH)),int(cameraCapture.get(cv2.CAP_PROP_FRAME_HEIGHT)))
videoWriter=cv2.VideoWriter('C:/Users/admin/Desktop/test/video/2.avi',cv2.VideoWriter_fourcc('X','V','I','D'),fps,size)
success,frame = cameraCapture.read()
numFrameRemaining = 10 * fps    #摄像头捕获持续时间
while success and numFrameRemaining > 0:
    videoWriter.write(frame)
    success,frame = cameraCapture.read()
    numFrameRemaining -= 1
cameraCapture.release()

2、调用摄像头，通过OpenCV窗口显示画面

from cv2 import cv2
#判断窗口点击事件
clicked = False
def onMouse(event,x,y,flags,param):
    global clicked
    if event == cv2.EVENT_LBUTTONUP:
        clicked = True
#捕获序号为0的摄像头
cameroCapture = cv2.VideoCapture(0)
#创建窗口
cv2.namedWindow('window')
#cv2.setMouseCallback('window',onMouse)
#读取帧
success,frame = cameroCapture.read()
while success and cv2.waitKey(1) == -1:
    cv2.imshow('window',frame)
    success,frame = cameroCapture.read()
cv2.destroyWindow('window')
cameroCapture.release()

        由于OpenCV并没有真正提供窗体事件监听，在程序运行时无法通过点击关闭窗口，可以通过键盘监听cv2.waitKey(1)来判断，cv2.waitKey(1)=-1时为没有输入，即程序运行时可以通过按下任意键结束运行或终止调试。