使用python打开摄像头

1、安装cv2库

pip install opencv-python https://mirrors.tuna.tsinghua.edu.cn/help/pypi/ https://pypi.tuna.tsinghua.edu.cn/simple/opencv-python/

2、示例代码

import cv2
import time

cap = cv2.VideoCapture(0)               # 创建capture对象
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920) # 设置宽度
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080)# 设置高度

cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter.fourcc('M', 'J', 'P', 'G'))

while True:
    ret, frame = cap.read()

    cv2.imshow("打开摄像头", frame)

    print(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()))
    if cv2.waitKey(1) & 0xFF == ord('q'):   # 点击q键退出
        break

cap.release()
cv2.destroyAllWindows()