计算每秒发送的帧数问题opencv

import cv2
import time

# 打开视频文件或摄像头
cap = cv2.VideoCapture(0)

# 获取视频的帧率
fps = cap.get(cv2.CAP_PROP_FPS)

# 初始化计数器和开始时间
frame_count = 0
start_time = time.time()

while True:
    # 读取视频帧
    ret, frame = cap.read()

    if not ret:
        break

    # 在这里进行图像处理操作

    # 计算每秒发送的帧数
    frame_count += 1
    current_time = time.time()
    elapsed_time = current_time - start_time

    if elapsed_time > 1:
        fps = frame_count / elapsed_time
        print("FPS:", fps)

        # 重置计数器和开始时间
        frame_count = 0
        start_time = time.time()

    # 显示处理后的图像
    cv2.imshow("Frame", frame)

    # 按下 'q' 键退出循环
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# 释放视频对象和关闭窗口
cap.release()
cv2.destroyAllWindows()