Opencv调用摄像头，每分钟截取一张图片，并将截取图片保存为一个MP4文件

调用摄像头

import cv2
import numpy as np

def video_demo():
    print('开始')
    cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)  
    i = 0
    photoname = 1
 
    while True:
        i = i + 1
        reg, frame = cap.read()
        frame = cv2.flip(frame, 1)  
        cv2.imshow('window', frame)
 
        if i == 1440:  
 
            filename = str(photoname) + '.jpg'  
            cv2.imwrite('D:\mywork\JPG' + '\\' + filename, frame)  
            print(filename + '保存成功')  
            i = 0  
 
            photoname = photoname + 1
            if photoname >= 60:  
                break
        if cv2.waitKey(1) & 0xff == ord('q'):
            break
    
    cap.release()
 
video_demo()
cv2.destroyAllWindows()

将保存的图片保存为MP4文件

import cv2
import os
fourcc = cv2.VideoWriter_fourcc(*'MP4V')
out = cv2.VideoWriter('D:\mywork\IMG\output.mp4', fourcc, 20, (640,480))
for i in range(1,60):
    im_name = os.path.join('D:\mywork\JPG', str(i)+'.jpg')
    print(im_name)
    frame = cv2.imread(im_name)
# print(frame)
    out.write(frame)
out.release()