18:45:45.247: Windows Version: 10.0 Build 17134 (revision: 765; 64-bit)
Windows is out of date and Game Mode is on by default and cannot be switched off. This degrades OBS performance. The link at the bottom of this post has information on how to turn this feature off.
You are actually having quite a bit of lag:
18:47:16.455: Output 'adv_file_output': Number of lagged frames due to rendering lag/stalls: 1238 (21.8%)
18:51:33.441: Output 'adv_file_output': Number of lagged frames due to rendering lag/stalls: 433 (10.6%)
Rendering lag caused by GPU overload. This may be resolved by turning off game mode; if not, you should cap in-game framerate, reduce frame size, frame rate, or some combination thereof.
https://obsproject.com/wiki/GPU-overload-issues
18:47:16.457: Video stopped, number of skipped frames due to encoding lag: 3145/5648 (55.7%)
18:51:33.447: Video stopped, number of skipped frames due to encoding lag: 1411/4081 (34.6%)
Encoding lag.
https://obsproject.com/wiki/General-Performance-And-Encoding-Issues
18:48:06.629: Starting recording due to hotkey
18:48:06.843: [jim-nvenc: 'recording_h264'] settings:
18:48:06.843: rate_control: CBR
18:48:06.843: bitrate: 10000
You should use CRF or CQP rate control when recording with NVENC; there is no advantage to using CBR for recording, it is better suited for streaming (streaming platforms require it).
18:49:11.576: adding 46 milliseconds of audio buffering, total audio buffering is now 208 milliseconds (source: Desktop Audio)
Increasing audio buffering indicates general system overload. The mouse stutter would seem to corroborate that.
