KSP2 and OBS intercaction

[L3_3x]

While running KSP2, OBS camera and microphone capture completely glitch out. The camera feed keeps disconnecting and the microphone feed behaves similarly. The encoding version (software/hardware) doesn't make a difference. This only happens while I'm in the KSP window (as in my mouse is active on it, if i have it open but interacting with my browser on my other screen, OBS works fine). This doesn't happen with any other game or program. In-game settings don't have any impact either, tried different quality settings, fullscreen, borderless and even windowed. I would love to stream the game but currently can't. The actual display/game capture seems to work normally 

Specs:

KSP current version, Windows 11, AMD Ryzen 5 5600, AMD RX 6700XT, 16GB 3600MHz RAM 

 

 

 

 

 

[Gargamel]

Moved to tech support. 

[Fab Space Industries]

I have this problem, I think. My rig uses a 3080 TI, Ryzen 5 5600  and 32 GB of RAM. The game runs alright, GPU utilisation is between 65 and 90 %, the CPU never goes above 20%. When I stream it with OBS studio, as soon as I switch to KSP2, my camera stutters heavily and the game capture also starts to drop frames. OBS stats say I am losing frames due to rendering lag. Switching between encoding on the CPU or the GPU doesn’t matter. Unplugging my webcam (an Elgato Face Cam) fixes the issue.

I managed to somehow fix this temporarily by playing around with the game’s graphics settings and OBS, but I have no idea what fixed it. In any case, the problem came back. The way the game doesn’t adhere to the graphics settings I change without a restart and this sometimes fixing this and other issues makes me think this is a bug with the game. I am using the latest drivers from Nvidia, BTW.

Edited March 4, 2023 by Fab Space Industries

[HansAcker]

OBS needs VRAM and a few GPU resources to scale and compose the frames. KSP takes all your VRAM.
You could try and reduce the amount of resources OBS needs, e.g. set the camera to a lower resolution and don't transform it with OBS, don't use fancy masking filters, etc.

https://obsproject.com/wiki/GPU-overload-issues