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whitelephantee

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python录音 生成wav 并播放

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安装包

pyaudio

安装pyaudio真是曲折的过程……

直接用pip安装会报错

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python3 -m pip install pyaudio
>  fatal error: 'portaudio.h' file not found

所以要先用brew下portaudio，但是我的homebrew死活无法下载portaudio

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brew install portaudio
> no formulae found

试过重启什么的都不行，最后重新安装了homebrew

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cd /usr/local/Homebrew/Library/Taps/homebrew/
rm -rf homebrew-core
git clone https://github.com/Homebrew/homebrew-core.git

然后就成功安装了portaudio，但是安装pyaudio依然报错失败，尝试link

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brew link portaudio

但是显示已经link了，仍然无法安装。

最后终于找到了方法，手动找到portaudio.h的位置‘usr/local/Cellar/portaudio/19.7.0/include’ ，然后以如下方式安装就可以啦

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python3 -m pip install --global-option='build_ext' --global-option='-I/usr/local/Cellar/portaudio/19.7.0/include' --global-option='-L/usr/local/Cellar/portaudio/19.7.0/lib' pyaudio

playsound/pydub

这个就正常安装就没问题。

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python3 -m pip install playsound pydub

播放音频

这个很简单。

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from playsound import playsound

playsound("chunk3.wav")

另外一种方法

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from pydub import AudioSegment
from pydub.playback import play

# read MP3 file
song = AudioSegment.from_wav("/Users/whitelephant/Files/ENN/发音/audio-chunks/chunk3.wav")
# song = AudioSegment.from_mp3("audio_file.mp3")
# you can also read from other formats such as MP4
# song = AudioSegment.from_file("audio_file.mp4", "mp4")
play(song)

录音并生成文件

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CHUNK = 1024  # 每个缓冲区的帧数
FORMAT = pyaudio.paInt16  # 采样位数
CHANNELS = 1  # 单声道
RATE = 44100  # 采样频率

def record_audio(wave_out_path, record_second):
    """ 录音功能 """
    p = pyaudio.PyAudio()  # 实例化对象
    stream = p.open(format=FORMAT,
                    channels=CHANNELS,
                    rate=RATE,
                    input=True,
                    frames_per_buffer=CHUNK)  # 打开流，传入响应参数
    wf = wave.open(wave_out_path, 'wb')  # 打开 wav 文件。
    wf.setnchannels(CHANNELS)  # 声道设置
    wf.setsampwidth(p.get_sample_size(FORMAT))  # 采样位数设置
    wf.setframerate(RATE)  # 采样频率设置

    for _ in range(0, int(RATE * record_second / CHUNK)):
        data = stream.read(CHUNK)
        wf.writeframes(data)  # 写入数据
    stream.stop_stream()  # 关闭流
    stream.close()
    p.terminate()
    wf.close()

filepath = 'try.wav'
record_audio(filepath,10)

Reference

Python实现电脑录音（含音频基础知识讲解）

How to Play and Record Audio in Python