Question / Help 1440p Streaming Quality...

[The_Great_Sephiroth]

I'm looking to begin streaming with a few friends. I run in 1440p and the games I play bounce between 60 and 144fps with v-sync and G-Sync on. I can lock my games to 60fps for streaming. I streamed and recorded tonight with the same settings. The video is PERFECT, but the stream went blocky whenever there was movement. I use NVENC for streaming with rate control on lossless, preset on max quality, and profile on high. Key frame and GPU are both 2, and b-frames are 2. The recording settings are identical. I have 30Mbps up. I normally test between 29Mbps and 32Mbps up. I assume this is enough for streaming in 1440p. My system specs are below.

Core i7-6950X
32GB Corsair DDR4
1TB WD Blue with Windows 7 Pro 64bit on it
2 x 1TB WD Black, single-platter disks in RAID0 for recording
1 x M.2 NVME (3,500~3,600MB/s) 1TB SSD for games
RTX 2080 Ti
Three virtual audio cables
Voicemeeter Potato for mixing and adjusting audio levels
S2417DG Dell Gaming Monitor (24", 1440p, G-Sync)

I am not losing frames or getting lag according to the log. In other words, everything is working like butter, but I am not getting a good stream. I imagine that using lossless I have to set something, somewhere to tell OBS to use so much bandwidth for it (CBR?).

*UPDATE*

I tried CBR with 15,000 for the rate and doubled the b-frames to 4. Seemed to work fine. Will be reviewing the stream once YouTube finishes processing it. I am still open to suggestions however! Just because this works does not mean that it is the best. Some guru may know how to achieve the same quality with a lower bit-rate or something, and I am all ears!

 

[Narcogen]

There is no magic button. The solution to "compression artifacts during rapid motion" is "higher bitrate."

People stream 1080p60 at under 10k but mostly because they have to. If recording locally, they'll use WAY more than that, so the fact that you need 15k or higher to hold 1440p during fast motion is not particularly surprising.

 

[The_Great_Sephiroth]

I may up it to 18k or 20k and use QoS on my router to reserve 20Mbps of my upstream bandwidth when I decide to stream. Or I can keep doing my current thing of recording to disk at lossless, editing, then uploading.