Question / Help Lagging while recording

[Cassitty]

Im trying to record 1080p but its very laggy,any help is appreciated

https://gist.github.com/95146df29c0fc746d4ec4101c587fc86

 

[Cassitty]

I don't get any lag in game just the recording

 

[cheat]

I had the same problem and I found out the cause in my case.
https://youtu.be/cxkEnObgdA8