python实现录音小程序

本文为大家分享了python实现录音小程序的具体代码,供大家参考,具体内容如下

学习目标:掌握python的pyaudio扩展包和Wave模块录制语音的方法

  • Wav音频:声道数,采样频率,量化位数

python Wav包是自带的,pyaudio需要下载

pip3 install pyaudio

python读Wav文件:

fp=wave.open('','rb')
  nf=fp.getnframes()#获取文件的采样点数量
  print('sampwidth:',fp.getsampwidth())
  print('framerate:',fp.getframerate())
  print('channels:',fp.getnchannels())
  f_len=nf*2#文件长度计算,每个采样2个字节
  audio_data=fp.readframes(nf)

python写Wav文件:

def save_wave_file(filename,data):
  '''save the date to the wavfile'''
  wf=wave.open(filename,'wb')
  wf.setnchannels(channels)#声道
  wf.setsampwidth(sampwidth)#采样字节 1 or 2
  wf.setframerate(framerate)#采样频率 8000 or 16000
  wf.writeframes(b"".join(data))#https://stackoverflow.com/questions/32071536/typeerror-sequence-item-0-expected-str-instance-bytes-found
  wf.close()

利用PyAudio录音:

def my_record():
  pa=PyAudio()
  stream=pa.open(format = paInt16,channels=1,
          rate=framerate,input=True,
          frames_per_buffer=NUM_SAMPLES)
  my_buf=[]
  count=0
  while count 
 

利用PyAudio播放音频

chunk=2014
def play():
  wf=wave.open(r"01.wav",'rb')
  p=PyAudio()
  stream=p.open(format=p.get_format_from_width(wf.getsampwidth()),channels=
  wf.getnchannels(),rate=wf.getframerate(),output=True)
  while True:
    data=wf.readframes(chunk)
    if data=="":break
    stream.write(data)
  stream.close()
  p.terminate()

完整录音播放的demo

import wave
from pyaudio import PyAudio,paInt16

framerate=8000
NUM_SAMPLES=2000
channels=1
sampwidth=2
TIME=2
def save_wave_file(filename,data):
  '''save the date to the wavfile'''
  wf=wave.open(filename,'wb')
  wf.setnchannels(channels)
  wf.setsampwidth(sampwidth)
  wf.setframerate(framerate)
  wf.writeframes(b"".join(data))
  wf.close()

def my_record():
  pa=PyAudio()
  stream=pa.open(format = paInt16,channels=1,
          rate=framerate,input=True,
          frames_per_buffer=NUM_SAMPLES)
  my_buf=[]
  count=0
  while count 
 

更多用法详见 pyaudio文档

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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