如何在OpenCV中设置时间后自动关闭摄像头流？

import cv2
import time

cap = cv2.VideoCapture(0)

closing_time = 10  # 设置关闭时间为10秒
start_time = time.time()  # 记录开始时间

while True:
    ret, frame = cap.read()
    cv2.imshow('Camera', frame)
    
    # 检查是否达到关闭时间
    current_time = time.time()
    elapsed_time = current_time - start_time
    if elapsed_time >= closing_time:
        break
    
    # 检测按键，如果按下q键则退出循环
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()