如何在kivy中将语音转换为文本

from kivy.core.audio import SoundLoader

def record_audio(filename):
    sound = SoundLoader.load(filename)
    sound.record()
    # 等待录制完成
    sound.stop()

import requests

def convert_speech_to_text(filename):
    # 读取语音文件
    with open(filename, 'rb') as f:
        audio_data = f.read()

    # 构建请求参数
    params = {
        'appid': 'your_appid',
        'secretid': 'your_secretid',
        'secretkey': 'your_secretkey',
        'engine_model_type': '16k_0',
        'res_type': 1,
        'voice_format': 'wav',
        'data': audio_data
    }

    # 发送HTTP请求
    response = requests.post('https://api.ai.qq.com/fcgi-bin/aai/aai_asr', data=params)

    # 解析返回结果
    result = response.json()
    if result['ret'] == 0:
        text = result['data']['text']
        return text
    else:
        return None

from kivy.app import App
from kivy.uix.label import Label

class SpeechToTextApp(App):
    def build(self):
        # 录制语音
        record_audio('speech.wav')

        # 将语音转换为文本
        text = convert_speech_to_text('speech.wav')

        # 创建标签组件，显示转换后的文本
        label = Label(text=text)
        return label

if __name__ == '__main__':
    SpeechToTextApp().run()