Let's go straight to the code:
import numpy as np
import cv2
cap = cv2.VideoCapture(0) #'0'选择笔记本电脑自带参数，‘1’为USB外置摄像头
print(cap.get(3), cap.get(4)) #查看当前捕获视频的尺寸，默认为640*480
cap.set(propId=3, value=320) #设置你想捕获的视频的宽度
cap.set(propId=4, value=240) #设置你想捕获的视频的高度
print(cap.get(3), cap.get(4)) #验证是否设置成功
while (True):
ret, frame = cap.read() #读取图像并显示
cv2.imshow('frame', frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release() #按‘q’键退出后，释放摄像头资源
cv2.destroyAllWindows()
Some screenshots are as follows:
