What is your capture settings?

Frame tearing would suggest that a frame is being captured partially through a refresh.

For example, if you capture at 24fps and the game runs at 60fps, the point in which a frame is captured is potentially out of sync with when it's rendered.

This may also explain why stuttering appears, when the compositor is enabled it forces a stall and throws out the frame pacing.

Note: I have dabbled a little with Nvidia capture and OBS over the years but I am by no means an expert.

I dont think i have ever experienced this. Have been using nvfbc for the last year or so. I have forcecomposition enabled. Using nvenc, mkv, CQP 17, Keyframe inverval 2, preset Low latency, Profile High and max B-frames 2. My screen is 170hz though but recording 60 fps 1440pö footage. I used to use KDE few months ago just fine also, but currently on MATE desktop again.

Quoting: kit89What is your capture settings?

i have tried all kinds of settings and the issue still happens tried using nvenc and setting CBC settings to max performance also tried the low latency options, rescaling to 720p instead of native 4k, setting fps for the capture at 30.

https://i.imgur.com/i5FBKnv.png

Last edited by zany130 on 2 Jan 2022 at 8:57 pm UTC

Quoting: zany130

Quoting: kit89What is your capture settings?

i have tried all kinds of settings and the issue still happens tried using nvenc and setting CBC settings to max performance also tried the low latency options, rescaling to 720p instead of native 4k, setting fps for the capture at 30.

https://i.imgur.com/i5FBKnv.png

Cheers, what's your settings in the Video Panel?

When you record the game is it Fullscreen or Windowed?

The Video Panel allows you to specify the capture rate, which is a dropdown that says:

• Common FPS Values


• Integer FPS Value


• Fractional FPS Value

For my own setup I have this at Common FPS Values and 60.

I would recommend avoid down-scaling while recording* it adds additional processing.

A 1080 is a pretty competent card though I am not certain how good it is for 4K content.

* There are exceptions

Quoting: kit89Cheers, what's your settings in the Video Panel?

https://i.imgur.com/y2vCC1U.png

Quoting: kit89When you record the game is it Fullscreen or Windowed?

I tried both full screen and windowed still get either stuttering or tearing when I use window capture or nvFBC capture.
also I tried different resolutions for the output video and I got the best performance with the options I set above (720p 30 fps) but it still causes slow downs when using screen capture with nvFBC game runs fine regardless of settings but the display stutters with fullcompositionpipeline (game runs at a locked 60fps) or tears without

Are you using vsync from either game settings or goverlay/mangohud or from somewhere else?
Maybe those don't match with the 60 fps recording and do some weird tripplebuffering and lowering the video output framerates for some reason. The only thing i can think of as i don't use vsync in my games. just let it run at whatever higher framerates they run but capturing at 60.
Do you have an example video about the stutter somewhere so i could investigate and maybe we can check settings one by one in nvidia-settings and OBS to check what might cause it for you.

Last edited by Xpander on 3 Jan 2022 at 12:07 pm UTC

Quoting: XpanderAre you using vsync from either game settings or goverlay/mangohud or from somewhere else?
Maybe those don't match with the 60 fps recording and do some weird tripplebuffering and lowering the video output framerates for some reason. The only thing i can think of as i don't use vsync in my games. just let it run at whatever higher framerates they run but capturing at 60.
Do you have an example video about the stutter somewhere so i could investigate and maybe we can check settings one by one in nvidia-settings and OBS to check what might cause it for you.

well the recording always comes out fine

https://vimeo.com/662011016

It's on the actual display I have issues with. If I set my game without vsync or an fps cap it does help with the stuttering but it causes the display to feel very laggy

on the OBS discord it was suggested that maybe I am running into this [issue](https://github.com/obsproject/obs-studio/issues/5685) although they think it's doubtful as the regression was introduced after 27.11.3-3 which is what I have tried building the [fix](https://github.com/ishitatsuyuki/obs-studio/tree/my-next-gpu-wont-be-nvidia) anyway using these build [instructions](https://github.com/obsproject/obs-studio/wiki/Install-Instructions#linux-portable-mode-all-distros) but got these [errors](https://hastebin.skyra.pw/texuyabace.bash)

EDIT: was somehow able to fix the issue by disabling the game vsync and fps limiter, keeping forcecompositionpipline enabled in the nvidia settings, setting mangohud to use mailbox vsync vsync=2,and setting a fps limit of 60 in mango hud. game runs butter smooth now. Sometimes I have to switch between fps limits to get the game running smoothly for some reason so I set multiple fps limits in mangohuds config fps_limit=60,45,30,0(0 is unlimited)

EDIT2: so this issue went from strange to downright impossible. So I didn't notice originally, but my 'fix' requires my game settings to be set to the maximum (lowering the game settings actually causes the game to stutter more which makes no sense, only way I can logicly explain this is that increasing the settings causes my gpu to be used more whereas lower settings limit gpu usage) the problem with this is on demanding scenes this actually causes the fps to drop bellow 60 causing the game to stutter. So basically I either lower graphical settings and get stuttering on the display but the game runs at or above 60 fps or I increase graphical settings and that causes everything to run smoothly until the GPU can't keep the fps above 60 (on demanding scenes) and then the game stutters.

Last edited by zany130 on 3 Jan 2022 at 8:27 pm UTC