Question / Help Recording doesn't start on RX Vega 56, processes remain running when closing OBS

[Snowknight26]

I'm trying to record using either game or display capture, but every time I start recording, the following happens:

* the recording does not actually start (no file is created) despite OBS saying recording
* clicking stop recording makes OBS just hang there - the button says "stopping recording"
* closing OBS still leaves a few processes running, like ffmpeg-mux.exe or whatever it is, and obs.exe.

Attached is the log file from my latest try.

Relevant line from the log:

06:14:26.816: [AMF] <Id: 14> [Store] Conversion of Surface failed, error AMF_NOT_SUPPORTED (code 10)

 

[Snowknight26]

Anyone have any idea why this fails? I looked through the source code and some AMF documentation but can't seem to figure out why the surface conversion fails.

Convert the current AMFData object to a different memory type, transferring the content to a new memory location when necessary even if it involves a copy to the host memory and back.
[...]
AMF_NOT_SUPPORTED when conversion is not supported on the current platform