Question / Help Fraps records it perfect, OBS doesn't. Why?

[MistaCuddles]

I'm recording with a custom buffer size of 0.
CRF-15 because I want the video to be high quality.
CBR disabled, "Max Bitrate" set to 1000
1080p, 60 frames per second.

I get choppy laggy video, and the game itself lags as well.

I record with Fraps and none of this happens. Although the downside is that you get massive 4gb files that hold only 50 seconds of footage.

It seems like this is the big difference:
Fraps records it cleanly but makes massive files
OBS records it choppy but gets pretty small files

Is there any way to set it up so that it makes larger files (not as large as fraps) so that it won't care about these constraints as much? Fraps just goes crazy with it and will take up as much space as it wants as long as the video comes out perfect.

Logs attached.

 

[Cryonic]

You have to adjust bitrate.
For local recording you can get up to 50.000 bitrate or even higher (but 50k should be enough for good material for editing it later for youtube etc).
Fraps records raw material without any compression, this is why files are so huge. OBS is designed to squeeze the file to a size that can be sent in realtime to a server from a slow home internet connection, so it needs a) more power and b) it will never look as good as an uncompressed file.
Find your video bitrate settings that makes you happy in terms of file size and quality. Max bitrate 1000 will never look good at any useful resolution, and for local recording you are limited by the avaliable space and the HDD/SSD speed that you are recording too.
So if your SSD can handle 300mbit/s writing, you can do that if you want :-)