python - 列出设备时 PyAudio 'utf8' 错误

Question

当使用支持 ASIO+DirectSound 的 PyAudio(Portaudio 绑定(bind))时，此代码:

import pyaudio

p = pyaudio.PyAudio()
for i in range(p.get_device_count()):
    print p.get_device_info_by_index(i)

...产生此错误:

UnicodeDecodeError: 'utf8' codec can't decode byte 0xe9 in position 1: invalid continuation byte

我们如何解决这个问题？

---

问题可能来自“pyaudio.py”，第 990 行，因为 utf8 解码失败:

           return {'index' : index,
                    'structVersion' : device_info.structVersion,
                    'name' : device_info.name,

---

这个答案在这里Special characters in audio devices name : Pyaudio (“不要使用 PyAudio”)并不令人满意。

---

回溯

...
{'defaultSampleRate': 44100.0, 'defaultLowOutputLatency': 0.0, 'defaultLowInputLatency': 0.12, 'maxInputChannels': 2L, 'structVersion': 2L, 'hostApi': 1L, 'index': 8, 'defaultHighOutputLatency': 0.0, 'maxOutputChannels': 0L, 'name': u'Microphone interne (Conexant 20672 SmartAudio HD)', 'defaultHighInputLatency': 0.24}
Traceback (most recent call last):
  File "D:\test\test.py", line 5, in <module>
    print p.get_device_info_by_index(i)
  File "C:\ProgramData\Anaconda\lib\site-packages\pyaudio.py", line 977, in get_device_info_by_index
    pa.get_device_info(device_index)
  File "C:\ProgramData\Anaconda\lib\site-packages\pyaudio.py", line 990, in _make_device_info_dictionary
    'name' : device_info.name,
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe9 in position 1: invalid continuation byte

Answer 1

“无效连续字节”错误让我认为该特定索引的文本已损坏。

如果您能够修改 pyaudio.py 文件(或让 pyaudio.py 文件仅返回名称)，您也许能够尝试使用“Unicode Dammit”自行处理 UTF-8 解码。几乎需要最好地猜测编码是什么。这是他们教程的链接 ( http://www.crummy.com/software/BeautifulSoup/bs4/doc/#unicode-dammit )

我认为代码看起来就像教程一样:

from bs4 import UnicodeDammit

dammit = UnicodeDammit(audiodevicename)
print(dammit.unicode_markup) ## Wéird Device Name!