Question / Help OBS records my MAME games and Video Games in Very Small Windows not Fullscreen

[JPhardboiled]

I've tried game capture and scaling, using display capture, but they don't capture MAME emulator or video games I put in full screen as full screen. I either get a black screen and audio or a very small window and audio not full screen recordings even though I'm playing full screen. Any suggestions?

Log attached

 

[Holyrood]

same thing man. tried game, window. obs just wont pick up games from mame..... can anyone please help?