pyaudio与优美的声音

安装pyaudio

sudo apt-get install python-pyaudio python3-pyaudio

声音录制

import pyaudioimport wavedef record_audio(wave_out_path,record_second):
  CHUNK = 1024
  FORMAT = pyaudio.paInt16
  CHANNELS = 2
  RATE = 44100


  p = pyaudio.PyAudio()


  stream = p.open(format=FORMAT,
          channels=CHANNELS,
          rate=RATE,
          input=True,
          frames_per_buffer=CHUNK)

  wf = wave.open(wave_out_path, 'wb')

  wf.setnchannels(CHANNELS)

  wf.setsampwidth(p.get_sample_size(FORMAT))

  wf.setframerate(RATE)

  print("设置参数完毕")
  print("开始录制声音")
  # int(RATE / CHUNK * record_second)录制时间内,需要读取多少次数据
  # CHUNK一次采样数据多少
  # RATE一秒采样多少
  for _ in range(0, int(RATE / CHUNK * record_second)):
    data = stream.read(CHUNK)
    wf.writeframes(data)
      
  print("录制完成")
  
  stream.stop_stream()
  stream.close()
  p.terminate()
  wf.close()if __name__ == '__main__':
    record_audio("output.wav",record_second=4)

声音播放

import pyaudioimport wavefrom tqdm import tqdmdef play_audio(wave_path):
  CHUNK = 1024
  wf = wave.open(wave_path, 'rb')
  # instantiate PyAudio (1)
  p = pyaudio.PyAudio()
  # open stream (2)
  stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
          channels=wf.getnchannels(),
          rate=wf.getframerate(),
          output=True)
  
  # read data
  data = wf.readframes(CHUNK)
  # play stream (3)
  datas = []
  while len(data) > 0:
    data = wf.readframes(CHUNK)
    datas.append(data)
  for d in tqdm(datas):
    stream.write(d)
  # stop stream (4)
  stream.stop_stream()
  stream.close()
  # close PyAudio (5)
  p.terminate()if __name__ == '__main__':
    play_audio("output.wav")

在执行其他程序时同时播放音频，可以使用回调的方式播放

import pyaudioimport wavefrom tqdm import tqdmimport timedef play_audio_callback(wave_path):
  CHUNK = 1024
  wf = wave.open(wave_path, 'rb')
  # instantiate PyAudio (1)
  p = pyaudio.PyAudio()
  def callback(in_data, frame_count, time_info, status):
    data = wf.readframes(frame_count)
    return (data, pyaudio.paContinue)
  # open stream (2)
  stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
          channels=wf.getnchannels(),
          rate=wf.getframerate(),
          output=True,
          stream_callback=callback)
  # read data
  stream.start_stream()
  while stream.is_active():
    time.sleep(0.1)
  # stop stream (4)
  stream.stop_stream()
  stream.close()
  # close PyAudio (5)
  p.terminate()play_audio_callback("output.wav")

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