Question / Help Video Freezes During High Motion Scenes

[Iridiums]

I wanna record some game play of all different kinds of games, but some of them, like first person action, have a lot of high motion scenes, but I can't find the right settings that can handle those types of games. I use Game Capture at 30-60 FPS depending on the game I play, and I have the cfr=15. The sound works fine and it plays everything that is happening; pretty much everything works fine except for the video. I will include my specs and the log of trying to record a video if it helps.
Log: https://gist.github.com/1f368bd7fb018bfc0a623f68126318ca

Specs:
Operating System:
Windows 7 Ultimate 6.1 Build 7601
Processor:
Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00 GHz (2 CPUs) ~2.67 GHz
RAM:
4.00 GB (3.25 usable)
System Type:
32-bit OS
Graphics Information
Name: AMD Radeon HD 6700 Series (both monitors; I use "extend display") Chip Type: AMD Radeon Graphics Processor (0x68BF)
DAC Type: Internal DAC(400 MHz)
Total Memory: 2.42 GB
Usual Display Mode: 1920 x 1080 (32-bit) (60 Hz)

 

[Yasaka]

do you watched your cpu usage or obs? if the usage is too high obs gives you a warning message in the left down corner of obs.

 

[Iridiums]

do you watched your cpu usage or obs? if the usage is too high obs gives you a warning message in the left down corner of obs.

It does give me a warning but only just for a few seconds.
How can I lower CPU usage? I have a decent computer and yet I can't record...

 

[Yasaka]

so you are already at the most leightweight preset ultrafast. maybe you should set crf=18. if this doesnt work you have to downscale your recording to 720p. then it should work better.

 

[Iridiums]

Thanks Yasaka I set the crf=18 and it worked really well! I didn't have to downscale anything!