python - wave.Error : unknown format: 3 arises when trying to convert a wav file into text in Python

Question

我需要从麦克风录制音频并将其转换为文本。我已经使用从网上下载的几个音频剪辑尝试了这个转换过程，它工作正常。但是，当我尝试转换从麦克风录制的音频剪辑时，会出现以下错误。

回溯(最近一次通话最后):
文件“C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\site-packages\speech_recognition__init__.py”，第 203 行，位于 输入
self.audio_reader = wave.open(self.filename_or_fileobject, "rb")
文件“C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\wave.py”，第 510 行，打开
返回 Wave_read(f)
文件“C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\wave.py”，第 164 行，位于 初始化
self.initfp(f)
文件“C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\wave.py”，第 144 行，在 initfp
self._read_fmt_chunk( block )
_read_fmt_chunk 中的文件“C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\wave.py”，第 269 行
raise Error('未知格式: %r' % (wFormatTag,))
wave.Error:未知格式:3

我正在尝试的代码如下。

import speech_recognition as sr
import sounddevice as sd
from scipy.io.wavfile import write

# recording from the microphone
fs = 44100  # Sample rate
seconds = 3  # Duration of recording

myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=2)
sd.wait()  # Wait until recording is finished
write('output.wav', fs, myrecording)  # Save as WAV file
sound = "output.wav"
recognizer = sr.Recognizer()

with sr.AudioFile(sound) as source:
     recognizer.adjust_for_ambient_noise(source)
     print("Converting audio file to text...")
     audio = recognizer.listen(source)

     try:
          text = recognizer.recognize_google(audio)
          print("The converted text:" + text)

     except Exception as e:
          print(e)

我查看了已回答的类似问题，他们说我们需要将其转换为不同的 wav 格式。有人可以为我提供可用于此转换的代码或库吗？先感谢您。

Answer 1

您以浮点格式编写了文件:

soxi output.wav 

Input File     : 'output.wav'
Channels       : 2
Sample Rate    : 44100
Precision      : 25-bit
Duration       : 00:00:03.00 = 132300 samples = 225 CDDA sectors
File Size      : 1.06M
Bit Rate       : 2.82M
Sample Encoding: 32-bit Floating Point PCM

并且wave模块无法读取它。

要存储 int16 格式，请执行以下操作:

import numpy as np
myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=2)
sd.wait()  # Wait until recording is finished
write('output.wav', fs, myrecording.astype(np.int16))  # Save as WAV file in 16-bit format