如何在python vlc中获取音频的频率、音高、低度等？

pip install python-vlc

import vlc
import numpy as np

media_player = vlc.MediaPlayer('path_to_audio_file')
media_player.play()

def audio_callback(data, samples, count, format):
    # 将音频数据转换为numpy数组
    audio_data = np.frombuffer(data, dtype=np.int16)
    
    # 计算音频的频率、音高和低度等信息
    frequency = np.fft.fftfreq(len(audio_data))
    amplitude = np.abs(np.fft.fft(audio_data))
    pitch = np.argmax(amplitude)
    loudness = np.max(amplitude)
    
    # 打印音频信息
    print("Frequency: ", frequency)
    print("Pitch: ", pitch)
    print("Loudness: ", loudness)

# 将回调函数注册到MediaPlayer对象
media_player.audio_set_callbacks(audio_callback, None, None, None, None)

while media_player.is_playing():
    pass

# 停止音频播放
media_player.stop()