python + opencv 图像处理（二）——读取视频

from cv2 import cv2 as cv
import numpy as np 

def video_demo(): #读取视频
    capture = cv.VideoCapture(0) # 读摄像头，也可以读一些文件 0 指的是usb摄像头，读取其他视频可参考opencv2.py
    while True:
        ret,frame = capture.read()
        frame = cv.flip(frame,1)
        cv.imshow("video",frame)
        c = cv.waitKey(50)
        if c == 27:
            break
            
def videoFIle_demo():  #读取文件的视频
    capture = cv.VideoCapture('C:\\BaiduNetdiskDownload\\053.mp4') # 读摄像头，也可以读一些文件
    capture.read()
    while True:
        ret,frame = capture.read()
        #frame = cv.flip(frame,1)
        cv.imshow("video",frame)
        c = cv.waitKey(50)
        if c == 27:
            break
            
#cv.imshow("input image",img)
video_demo()
cv.destroyAllWindows()