IOError输入溢出：使用Tkinter接口录制音频

Question

我正试图做一个简单的GUI应用程序，只有一个按钮：记录。

您按下按钮并开始录制。当您释放按钮时，停止录制并保存录制内容。

不过，我得到以下错误，当我按一下按钮：

Traceback (most recent call last): 
    ... 
    data = self.stream.read(self.CHUNK) 
    File (...), line 608, in read 
    return pa.read_stream(self._stream, num_frames, exception_on_overflow) 
IOError: [Errno -9981] Input overflowed 
Exception in Tkinter callback 

但是我不有记录简单的音频，而按钮的Tkinter（代码示例，他们给here）问题。

这是代码：

import Tkinter as tk 
import pyaudio, wave 

class AppRecording: 
    def __init__(self, root): 
     self.root = root 
     self.mouse_pressed = False 
     recordingButton = tk.Button(root, text = "Record") 
     recordingButton.pack() 
     recordingButton.bind("<ButtonPress-1>", self.OnMouseDown) 
     recordingButton.bind("<ButtonRelease-1>", self.OnMouseUp) 
     self.CHUNK = 1024 
     self.FORMAT = pyaudio.paInt16 
     self.CHANNELS = 2 
     self.RATE = 44100 
     self.WAVE_OUTPUT_FILENAME = "output.wav" 

     self.p = pyaudio.PyAudio() 

     try: self.stream = self.p.open(format=self.FORMAT, 
        channels=self.CHANNELS, 
        rate=self.RATE, 
        input=True, 
        frames_per_buffer=self.CHUNK) 
     except: 
      raise Exception("There is no connected microphone. Check that you connect to the left hole if you have a PC.") 
      return None 

     self.frames = [] 

    def recordFrame(self): 
     try: 
      data = self.stream.read(self.CHUNK) 
      print "after try" 
     except IOError as ex: 
      print "inside except" 
      if ex[1] != pyaudio.paInputOverflowed: 
       print "before raise" 
       raise 
       print "after raise" 

      data = '\x00' * self.CHUNK # or however you choose to handle it, e.g. return None 

     self.frames.append(data) 

    def finishRecording(self): 

     self.stream.stop_stream() 
     self.stream.close() 
     self.p.terminate() 

     wf = wave.open(self.WAVE_OUTPUT_FILENAME, 'wb') 
     wf.setnchannels(self.CHANNELS) 
     wf.setsampwidth(self.p.get_sample_size(self.FORMAT)) 
     wf.setframerate(self.RATE) 
     wf.writeframes(b''.join(self.frames)) 
     wf.close() 

    def OnMouseDown(self, event): 
     self.mouse_pressed = True 
     self.poll() 

    def OnMouseUp(self, event): 
     self.root.after_cancel(self.after_id) 
     print "Finished recording!" 
     self.finishRecording() 

    def poll(self): 
     if self.mouse_pressed: 
      self.recordFrame() 
      self.after_id = self.root.after(1, self.poll) 

root=tk.Tk() 
app = AppRecording(root) 
root.mainloop() 

我试图改变self.CHUNK和self.RATE。我的iMac的内部麦克风说速率是44100.在一些地方我读到，我应该改变块或速率值，尝试两种，但没有人帮助。另一个地方叫我加except IOError as ex: (...)

---

PyAudio版本：0.2.10

pyaudio.get_portaudio_version()：1246720

pyaudio.get_portaudio_version_text()：PortAudio V19.6.0-devel的，修订396fe4b6699ae929d3a685b3ef8a7e97396139a4

Tkinter.__version__：$修订：81008 $

---

我会感谢您的帮助，谢谢！

Answer 1

哪个python/tk/portaudio/pyaudio版本？

我确认你的代码在Ubuntu 14.04 LTS x64（Python 2.7 with portaudio19-dev和PyAudio-0.2.10）下是好的（没问题），所以我认为这个问题可能与你的python，tk，pyaudio或portaudio版本...

您确定您的计算机上安装了最后一个portaudio & tk版本吗？