Slow Buffer overflow

[cwgreene]

Slow overrun in buffer. Should add diagnostics to output to track. So far, only happened on webcam input.

Traceback (most recent call last):
  File "./capture.py", line 88, in <module>
    main(sys.argv[1:])
  File "./capture.py", line 85, in main
    track(options)
  File "./capture.py", line 39, in track
    data = stream.read(CHUNK)
  File "/usr/local/lib/python2.7/dist-packages/pyaudio.py", line 608, in read
    return pa.read_stream(self._stream, num_frames, exception_on_overflow)
IOError: [Errno -9981] Input overflowed