我的python代码没有将视频帧保存为图像

import cv2

def save_frames(video_path, output_path):
    # 打开视频文件
    video = cv2.VideoCapture(video_path)
    
    # 检查视频文件是否成功打开
    if not video.isOpened():
        print("无法打开视频文件")
        return
    
    # 初始化帧计数器
    frame_count = 0
    
    # 循环读取视频帧
    while True:
        # 读取视频帧
        ret, frame = video.read()
        
        # 检查是否成功读取帧
        if not ret:
            break
        
        # 保存帧为图像文件
        frame_path = output_path + "/frame_" + str(frame_count) + ".jpg"
        cv2.imwrite(frame_path, frame)
        
        # 增加帧计数器
        frame_count += 1
    
    # 释放视频对象
    video.release()

# 调用函数保存视频帧
video_path = "path/to/video.mp4"
output_path = "path/to/save/frames"
save_frames(video_path, output_path)