如何用python回流rtmp？

import pyrtmp

rtmp_url = "rtmp://your_rtmp_url"
stream_key = "your_stream_key"

conn = pyrtmp.RTMP(rtmp_url, live=True)
conn.connect()
conn.publish(stream_key, "live")

video_file = "path_to_video_file"
cap = cv2.VideoCapture(video_file)

while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        break

    # 处理视频帧
    # ...

    # 发送视频帧到RTMP服务器
    conn.write_video_frame(frame)

audio_file = "path_to_audio_file"
audio = pyrtmp.Audio(audio_file)

while audio.has_next_frame():
    frame = audio.get_next_frame()

    # 发送音频帧到RTMP服务器
    conn.write_audio_frame(frame)

conn.close()
cap.release()