import time import numpy as np import pyaudio import config def start_stream(callback): p = pyaudio.PyAudio() frames_per_buffer = int(config.MIC_RATE / config.FPS) stream = p.open(format=pyaudio.paInt16, channels=1, rate=config.MIC_RATE, input=True, frames_per_buffer=frames_per_buffer) overflows = 0 prev_ovf_time = time.time() while True: try: y = np.fromstring(stream.read(frames_per_buffer), dtype=np.int16) y = y.astype(np.float32) callback(y) except IOError: overflows += 1 if time.time() > prev_ovf_time + 1: prev_ovf_time = time.time() print('Audio buffer has overflowed {} times'.format(overflows)) stream.stop_stream() stream.close() p.terminate()