High FPS - Stable Frame time - But game stutter when OBS turned on

kuroeve

New Member
hi, I'm having trouble recording using obs with game stuttering.

I'm testing on recording the game "a short hike" (very low graphic game), using obs with resolution 3840 x 1080 (1080p side by side, video on the left, screen on the right).

my system spec is 32gb ram, intel i7-9750H, with RTX2070, here's the log file if needed :

I'm using ultrawide samsung CRG9 monitor with 5120 x 1440 resolution 120 hz if that matters.

The game runs very smooth on stable 120fps when obs is turned off, I run RTSS to check, and even though the frame time is fluctuating, it feels very smooth.

when I run & record using OBS, the game stutter (a bit choppy). So I run RTSS to check the fps & frametime. It still got high fps (100+), but the game feels choppy. so I browse around for solution. Some people say lower the fps, it feels choppy because the frametime is not stable.

I set the game to cap at 60fps, 90fps, and the fps & frametime become very stable, not even fluctuating at all. but the game still feels choppy. when I close obs, the game immediately become smooth again.

I tried changing the recording FPS to 30, 31 (in obs) but still the same problem.

So at this point from technical point of view I don't know what to check. I've disable / enable game mode, uninstall game bar. stable high fps & frame time, and.. still feels choppy. so... I don't know what else to check. could anyone help identify the problem?
 
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