4K Monitor Output Scaled to 1080P but it make video frame rate drop.

[CYGNUSXIV]

I have 4K monitor but I just want to record at 1080P so I scaled it down to 1080P but the video from record have a frame issue
Example I record video game and it's often frame rate drop not always but most of time it'll drop around 10 - 15 frame

So I already tried to test a few thing before asking for help and this is the list I already test

Record with 4K monitor to 4K resolution by OBS : the video is unwatchable the frame is almost freezing
Record with 4K monitor to 1080P resolution by OBS : the video often having a frame drop around 10 - 15 Frame
Record with 1080P monitor to 1080P resolution by OBS : the video work perfectly fine
Record with 4K monitor to 4K resolution by NVIDIA Shadowplay : the video work perfectly fine
Record with 4K monitor to 1080P resolution by NVIDIA Shadowplay : the video work perfectly fine

Any idea how to fix this?

Log files : https://obsproject.com/logs/iQc1sRnXKSY5UmsC

I think the problem is about my setting or something in OBS not about the game I recorded or my PC spec but in case you want more other information

My PC Spec
CPU : i7 8700 3.20Ghz
GPU : RTX 3080
RAM : 16GB
OS : Windows 10
Game I recorded : Dasksider Genesis

 

[carlmmii]

Run OBS as admin (this will add OBS to the GPU priority list).
In your output settings, switch from "Max Quality" to "Quality, and uncheck Lookahead and Psychovisual tuning (all of these use CUDA, which can cause issues).

Do another test recording and post the log file.

 

[CYGNUSXIV]

Run OBS as admin (this will add OBS to the GPU priority list).
In your output settings, switch from "Max Quality" to "Quality, and uncheck Lookahead and Psychovisual tuning (all of these use CUDA, which can cause issues).

Do another test recording and post the log file.

It's quite help but it's not completely fix it still has some frame drop around 5 - 10 frame I guess
but use this method will effect the quality of video? I has to make the video on Youtube so quality is one of my concern too but thank for help

Log Files : https://obsproject.com/logs/elWZhlcKY04lDtri

 

[carlmmii]

No frames lost in the rendering/encoding process, so if there are missing frames, it's from the capture method.

You're recording using CQP, which targets a specific quality level that you specified. The output quality won't be affected, but you may have a slightly larger file size.

 

[CYGNUSXIV]

No frames lost in the rendering/encoding process, so if there are missing frames, it's from the capture method.

You're recording using CQP, which targets a specific quality level that you specified. The output quality won't be affected, but you may have a slightly larger file size.

Thank for the help but may I ask another question? what if I use this setting

Rate Control CBR
Bitrate 16,000 Kbps
Preset Quality
Turn off Look-ahead and Psycho Visual Tuning
GPU 0
Max B-frame 2

It'll be much different from CQP setting?