Question / Help Can Someone Help Me?

[xSonic521x]

Okay, long story short, I currently have a GTX 970 and an intel i7 4770k @ 4.2 GHz, all cores unparked. I stream some fairly demanding games currently using the preset Faster with no problems at 720P 60FPS. But there's two things that caught my eye, the Fast preset option for very fast motion game, and the performance hit it causes. I've seen on here several times from other threads that people with the same CPU should be able to use the Fast preset with no problem, but that may have been them outputting it at a different resolution and frame rate, I don't know. So my question is, if I wished to achieve smooth gameplay at that resolution and framerate with the Fast Preset, what would need to change? OBS' priority? The amount of cores it's using? (By the way I have no idea how to do that, I just see people saying put threads=9 if you have this CPU which makes no sense to me, wouldn't 8 be the most with hyper threading enabled?), The Games Priority? Any insight would be helpful. Sorry that my story wasn't so short by the way. .-.

 

[D2ultima]

You haven't listed the games, your bitrate, etc. High CPU using games obviously hit the CPU harder and leave less power for OBS to use. If you use "faster" in something like DoTA 2 and "fast" in something like Battlefield 4, you're going to run into problems.

 

[xSonic521x]

Bitrate shouldn't matter for CPU usage... And as for games, think of high CPU usage games such as BF4 like you said, my question is why would people suggest the Fast Preset for this CPU knowing there would be very CPU intensive games like that?

 

[D2ultima]

Bitrate matters for CPU usage. Lots of things matter for CPU usage via streaming programs... most of which are the secrets of myself and other people who know.

 

[TimeRocker]

I have a 4790k and i CAN use medium if not a higher preset, but i use fast. What the encoding quality does more or less is help with the blockyness during fast motion scenes at a lower bit rate. However, i dont recommend using a crappy bitrate with a higher settings because both are important. If you are looking at 720p@60fps, then i recommend around a 2500 or so bitrate. You COULD go higher, however it could possibly alienate a lot of people wanting to view and thus lower you viewer count.

Now if it is in game FPS you are after with your smooth/good OBS quality, you are mostly gonna have to sacrifice 2 things(or 1), your FPS in OBS from 60 to 30, or lower your game settings. That is mostly coming down to your graphics card at that point.

I will clear this up though, the bitrate does affect the cpu, but it is SUPER minute and not noticable. What is going to mostly affect your CPU is the encoding setting, broadcasting resolution, and the FPS in OBS.

If you want to see the difference between Very Fast preset and Fast, you can check my current live stream or recent VOD which is Fast preset, and then a VOD from over a week ago which was Very Fast preset

 

[D2ultima]

bitrate does affect the cpu, but it is SUPER minute.

It is not super minute, but there are other factors that apply to it. It is more of a coefficient based on your other settings, but it can be a difference of 5-10% at times, or more. And that can end up being a huge difference.

 

[Osiris]

It is not super minute, but there are other factors that apply to it. It is more of a coefficient based on your other settings, but it can be a difference of 5-10% at times, or more. And that can end up being a huge difference.

He is correct, bitrate barely affects CPU, especially at streaming bitrates.

 

[D2ultima]

He is correct, bitrate barely affects CPU, especially at streaming bitrates.

When the difference gets up to ~1000 bitrate and your compression is high and depending on what's on screen, it can get as high as I said. It is a coefficient.