Most efficient 4k60 recording settings for 2021?

Galach

New Member
Hello! I'm trying different settings to set dual PC 4k60 gameplay recording. Looking for good quality, but within reason.
Saw couple "lossless" tutorials on the web, but people get absolutely ridiculous files with 1 million bitrate, which is more than ProRes or other barely compressed codecs in some presets, but they use it for compressed h264, which is pointless as for me.
I'm looking for good balance in size and quality which will deliever nice looking footage with minimum artefacts and could be used with in large volumes of video production.
Last time I tried using CBR with 150.000 bitrate (VBR in my tests decreases target bitrate to much and looks unstable). Nvenc h264 codec preset Quality.
Results are not bad but in fast movements they could be better.
Interesting to hear the opinion and experience of other video nerds who tries to record 4k when 90% of audience watch in 1080p)

Stream PC (laptop) comfiguration
i7-10875h
RTX 3060 (105 tdp)
16gb ram
Gaming PC captures via Live Gamer Bolt card in 4k60
 

koala

Active Member
4k recordings are no different than other recordings. Fast movement would be better if you use the CQP rate control with nvenc, and a CQ value of around 18. Lower values mean higher quality. If you don't need to record multiple audio tracks, switch to simple output mode and choose "Indistinguishable quality" as quality. This is a preset that creates good raw material for further processing while not being as huge as lossless.
 

Galach

New Member
4k recordings are no different than other recordings. Fast movement would be better if you use the CQP rate control with nvenc, and a CQ value of around 18. Lower values mean higher quality. If you don't need to record multiple audio tracks, switch to simple output mode and choose "Indistinguishable quality" as quality. This is a preset that creates good raw material for further processing while not being as huge as lossless.
Does simple output mode use New Nvenc codec? In settings it named just NVENC when in Advanced mode it's Nvenc h264 (new)
 

koala

Active Member
Simple mode is just a wrapper around the advanced mode with mostly fixed (optimized) settings. It's the same encoder. Same API, same quality. It's just a convenient way to use the recommended and usually optimal settings.
 

Galach

New Member
Simple mode is just a wrapper around the advanced mode with mostly fixed (optimized) settings. It's the same encoder. Same API, same quality. It's just a convenient way to use the recommended and usually optimal settings.
Thanks! I also wanted to ask about keyframe interval and b-frames. How they affect to the quality. About b-frames I heard that higher value give better quality but in fast motion can create more artefacts. About keyframe interval I didn't hear anything)
 

koala

Active Member
These detailed encoding options are beyond the scope of this forum. I propose you change the values of the parameters you mention and compare the resulting videos with each other. If you see a difference, use the value from the better video. If you don't see any difference (this is what I would expect), use the OBS Studio defaults.
 
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