1.5 openCV-python 摄像头捕获视频

用摄像头捕获视频

使用摄像头来捕获一段视频，并把它转换成灰度视频显示出来

# -*- coding: utf-8 -*-
import numpy as np
import cv2.cv2 as cv2

# 处理视频文件
cap = cv2.VideoCapture(0)
while(1):
    # Capture frame-by-frame
    ret, frame = cap.read()

    # Our operations on the frame come here
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    # Display the resulting frame
    cv2.imshow('frame', gray)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# When everthing done, release the capture
cap.release()
cv2.destroyAllWindows()