python获取摄像头型号,python3.6 opencv获取摄像头代码

注意：运行代码的时候要注意清除缓存

import numpy as np

import cv2

cap = cv2.VideoCapture(0) # 从摄像头中取得视频

# 获取视频播放界面长宽

width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH) + 0.5)

height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT) + 0.5)

# 定义编码器 创建 VideoWriter 对象

fourcc = cv2.VideoWriter_fourcc(*'mp4v') # Be sure to use the lower case

out = cv2.VideoWriter('output.mp4', fourcc, 20.0, (width, height))

while(cap.isOpened()):

#读取帧摄像头

ret, frame = cap.read()

if ret == True:

#输出当前帧

out.write(frame)

cv2.imshow('My Camera',frame)

#键盘按 Q 退出

if (cv2.waitKey(1) & 0xFF) == ord('q'):

break

else:

break

# 释放资源

out.release()

cap.release()

cv2.destroyAllWindows()