What are you encoding with? CPU? Dedicated hardware encoder? CUDA encoder running on your GPU? Quality encoding is a compute intensive process, and each has a different architecture at the circuit level, which is why each has its advantages and disadvantages.
I’m not too experienced with livestream video encoding, but from what I’ve heard it sounds like a lot of people prefer CPU encoding for its ability to make the complex calculations that result in a crisp image. So if you’re encoding it one way, you could try switching things up to see if you get better results another way.
I wouldn’t take my response as a first class answer though, I’m just throwing up my thoughts; there’s a lot of other people on these forums with boots-on-the-ground experience in this stuff.