[Need Help]RPCS3 screen problems about OBS Studio

First of all, I want to record RPCS3 games.
However, there seems to be an optimization problem in RPCS3's window mode, and the frame drop is quite serious, so recording full screen game mode is the best choice.
But,I found there's no software(for example: OBS Studio) can record RPCS3 games in full screen mode.
I think it is because of the mismatch between the screen output mode and the renderer.
How can I solve this problem?

First of all, I want to record RPCS3 games.
However, there seems to be an optimization problem in RPCS3's window mode, and the frame drop is quite serious, so recording full screen game mode is the best choice.
But,I found there's no software(for example: OBS Studio) can record RPCS3 games in full screen mode.
I think it is because of the mismatch between the screen output mode and the renderer.
How can I solve this problem?

Just record all the screen. If your game is in full screen it doesn't matter, it's like you're recording the full screen mode.