Question / Help OBS Studio CPU usage Issue

[Grandmagusta]

Hi there I read the pinned Thread about CPU, but this seems to be a different problem.

I am in idle not doing anything with my pc and get 3-4% cpu usage then I start OBS and the cpu usage goes to 99-100%, the thing is only Task Manager shows that usage other programs like Process Explorer show 8% cpu usage.
The thing is OBS isn't using like 97% cpu it sits at 20-30, but every other process goes up until they reach 100% no matter how many processes are open(if i close some the other use more to get to 100% again).
I got a i7-4770K 8 cores(4 physical), 16 GB RAM, OS: Win10.
Lets be honest something like livesplit(timer for speedruns) shouldn't eat 50% cpu just becaus it's one of the few processes running alongside OBS.

Here the OBS Log: https://gist.github.com/2efe2cc15fa5bb84b7486a9e805fe7d6

Best Regards Grandmagusta

 

[Harold]

Does the problem persist with a new scene collection with only the basic sources required for what you're doing enabled?

 

[Grandmagusta]

Ok i found the culprit at least when i add my capture card it goes up to 100% again and without any source cpu is at 5%. Also tested my webcam that isn't the problem gets to 6% nothing more. So how could i fix this, because The capture card is obviously the most important part for me to stream. maybe it's some settings and not the card itself. I use the
SC-512N1-L/DVI Component HD and DVI Capture Board.