列出设备时出现PyAudio'utf8'错误

Question

使用PyAudio(Portaudio绑定)和ASIO + DirectSound支持时,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

我们怎样才能解决这个问题？

---

问题可能来自"pyaudio.py",第990行,因为utf8解码不成功:

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

---

这里的答案音频设备中的特殊字符名称:Pyaudio("不要使用PyAudio")并不令人满意.

---

追溯

...
{'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

错误'无效的延续字节'让我认为该文本对于该特定索引是腐败的.

如果你能够修改pyaudio.py文件(或者让pyaudio.py文件只返回名称),你可以尝试使用'Unicode Dammit'自己处理UTF-8解码.它几乎可以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:

from bs4 import UnicodeDammit

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

Answer 2

找到的唯一成功的解决方案是：

• 将 Tobias Erichsen'patch 应用于 PortAudio（如 @RossBencina 的评论中所述），可以在这里找到：https ://www.assembla.com/spaces/portaudio/support/tickets/224-patch-for-windows-directsound-and -wmme-utf-8-设备名称#/活动/票证
• 重建整个事情

非常感谢 @cgohlke 构建了新的即用型安装程序： http://www.lfd.uci.edu/~gohlke/pythonlibs/#pyaudio