"COM must not be in STA mode\n"

[Sulisahne]

Hi

This error occures when calling avcodec_open2 with the AV_CODEC_ID_H265 or AV_CODEC_ID_H264 encoder on windows:

"COM must not be in STA mode\n"
Could not open the codec: "Invalid argument"

Does anyone have an idea how to fix this?

[gizmocuz]

Did you found the reason or a solution ?

[Sulisahne]

Calling CoUninitialize(); before avcodec_open2 prevents the error. But that does not seem to be a good solution.

[gizmocuz]

It seems to only happen when using the default encoder, not when using nvenc or x264
Calling ::CoInitialize(nullptr); or ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED) seems to solve this issue