如何在open cv python中播放特定帧的音频视频？

import cv2
import numpy as np
import pyaudio

video_path = "path/to/video.mp4"
cap = cv2.VideoCapture(video_path)

total_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
fps = cap.get(cv2.CAP_PROP_FPS)

target_frame = 100  # 指定目标帧的索引
target_time = target_frame / fps  # 目标帧的时间点（秒）

cap.set(cv2.CAP_PROP_POS_MSEC, target_time * 1000)  # 设置视频的当前位置为目标帧的时间点

while cap.isOpened():
    ret, frame = cap.read()
    if ret:
        current_time = cap.get(cv2.CAP_PROP_POS_MSEC) / 1000  # 当前帧的时间点（秒）
        if current_time >= target_time:
            break
    else:
        break

audio_path = "path/to/audio.wav"
audio = pyaudio.PyAudio()

wf = wave.open(audio_path, 'rb')
stream = audio.open(format=audio.get_format_from_width(wf.getsampwidth()),
                    channels=wf.getnchannels(),
                    rate=wf.getframerate(),
                    output=True)

chunk = 1024
data = wf.readframes(chunk)

while data:
    stream.write(data)
    data = wf.readframes(chunk)

stream.stop_stream()
stream.close()
audio.terminate()