The x264 encoder supports both 4:4:4 as well as 4:2:0, as long as the underlying hardware is fast enough to handle it. It also has two different ways to reach each quality level: Constant Quantization Parameter (CQP) and Constant Rate Factor (CRF). Unfortunately OBS Studio only offers the latter, so for now we are stuck with that. With a single-PC setup, 4:4:4 recording using CRF will be very expensive. You might have to lower the preset used in order to maintain reasonable performance in game and encodes.
|Option||Lossless||Near Lossless||Indistinguishable||High Quality||Acceptable Quality|
|Preset||ultrafast - placebo (Slower presets may end up smaller, but take significantly more CPU)|
|Profile||None||None or high|
|Tune||None||Any (Ensure that your tune matches up with your target content, or leave at None)|