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Runtime error 0x800401F0 when running from standalone .exe

See original GitHub issue

Currently, using pyinstaller to build a onedir installation for my application that is using soundcard.

It all starts fine after adding the .h files but when I click my start recording button it throws a runtime error.

File "lib\site-packages\soundcard\mediafoundation.py", line 145, in get_microp hone                                                                               
File "lib\site-packages\soundcard\mediafoundation.py", line 127, in all_microp hones                                                                              
File "lib\site-packages\soundcard\mediafoundation.py", line 198, in __init__     File "lib\site-
packages\soundcard\mediafoundation.py", line 89, in check_error RuntimeError: Error 0x800401f0
--

It is something about the coInitialize but it sure looks like it actually gets set when I place a simple print at the line that does

hr = _combase.CoInitializeEx(_ffi.NULL, COINIT_MULTITHREADED) This error doesn’t get thrown when running it as a python script it only happens when I run it from my standalone executable.

PS - Really amazing library that you build and a life saver

Issue Analytics

State:
Created 3 years ago
Reactions:2
Comments:9 (9 by maintainers)

Top GitHub Comments

2reactions

Bob-Thomascommented, Apr 24, 2020

Alright, so I got it working the issue was that I am running the sound card library in a different thread that actually initialized it. So I needed to initialize the combase again inside the new thread.

I am using pywin32 for it with pythoncom.CoInitialize()

It seems to work flawlessly now

1reaction

bastibecommented, Apr 24, 2020

PS - Really amazing library that you build and a life saver

Thank you!

Are you importing anything else besides SoundCard? CoInitializeEx can cause problems if other libraries are also interacting with ComBase. PyQt or PySide for example. I know that in PySide’s case, the issue goes away if you switch the import order between PySide and SoundCard.

It might be that we would have to check if ComBase is already initialized, and only initialize if it isn’t… or something like that. SoundCard was my first foray into Windows programming, and I am far from an expert.

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