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It's also a big jump in terms of multithreading performance when going from 8700K to 10900K or even the stronger 5900X. Not sure if a 5950X is necessary, that might be an overkill, but I'm not sure.

Basically my question right now is; what CPU can push 4K HDR 60FPS with Vector Precision at HALF Pixel and Vector Grid at 4px (lowest possible value according to @Chainik)?

Yeah I laughed when I saw that, still a long way to go. Even nVidia Optical Flow still produces more artifacts than SVP in real time. Hopefully nVidia Optical Flow 3.0 has big improvements in terms of artifact masking, even then we'll still use it with SVP + MPV.

EDIT:

Just to make it clear, I am in support of AI Interpolation and it will likely be the biggest advancement in motion interpolation. But we're still not close to it becoming a mainstream in regular systems. Even some TV manufacturers are using their own methods starting this year I believe.

For best results, IMO:

Frame Interpolation Method should be on Uniform, and SVP Shader on Standard.

With your hardware, I wouldn't use nVidia Optical Flow. Test my settings below, change Artifact Masking level to your liking (do not use strongest, it hurts smoothness too much, strong is good).

https://imgur.com/a/3zHwYNl

Decrease motion vector grid as much as you can without it causing delayed or dropped frames.

Without nVidia Optical Flow, I can do 1080p at motion vector grid 16px and motion vectors precision at half pixel. But for 4K I use motion vector grid 32px and motion vectors precision at one pixel. My CPU is not strong enough, and without nVidia Optical Flow, most of the work is done by the CPU. I get better results with the settings in the picture above, than using 8px with nVidia Optical Flow. There's just too many artifacts for my liking with nVidia Optical Flow, and even though Custom 850 covers most of it, they are still very visible on the edges of the screen with optical flow.

Oh okay, fair enough. That's good to know.

Might be worth trying to test it internally and amongst the beta testers with Ampere cards and see the outcomes.

EDIT:

Wanted to ask, what about nVidia claims for Optical Flow 2.0?

- Increased accuracy in flow vector’s cost, which indicates the confidence of the vector

- Hardware optical-flow-assisted object tracker library

Do these improve the quality of Optical Flow over Turing GPU's? Or are they only performance enhancements and not visual improvements?

You don't need to install it. Comes packaged with the drivers when you install them, supported by the GPU via hardware. You just need a Turing GPU to use Optical Flow 1.0 and an Ampere GPU to use the features of 2.0 (such as 2px or 1px for motion vector grid).

If you have those GPU's you just enable it in SVP to use it.

Interesting yeah after exiting SVP when writing this post and going back, it was defaulting back to 4px. So I think it was defaulting back to 4px for maximum smoothness, but 4px still shows minimal artifacts. Maybe I can add a little masking to improve it.

I will edit the original post to write I am an idiot haha

Anyway, so how can I achieve 4px with 4K HDR content? Would upgrading the graphics card help this? Or is nvof_grid CPU related? Or it doesn't matter which RTX videocard because they all perform the same with Optical Flow?

Update: Got a reply back from the developer of those add ons:

Case closed, thread can be closed.

Not a Kodi or MPV issue. It's DRM related.

I did tell you to try that above but always feels better when you learn on your own haha

Of course those factors depend on display and its settings, your chosen media player, and your chosen settings for that media player.

So for example there is a panning motion scene in Game of Thrones Season 8 Episode 1, at the start when the kid goes up on the tree and the camera pans from Winterfell to the Army (this is a perfect scene when changing settings to judge smoothness).

I use MPV personally. So I always found a smoothness issue in this scene back in the day. If I have SVP frame rate conversion set to movie x2 and the refresh rate from nVidia control panel to 50Hz. It would play at 48 frames, and those 2 extra frames when they get dropped or delayed, it caused a hiccup in that scene too sometimes. If I set svp motion to screen, it played smooth in most cases at 50Hz, but sometimes when re-checking that scene over and over again it would hiccup sometimes and sometimes it would run smoothly. So I kept digging into mpv's settings and found "video-sync=display-resample", adding that to my mpv configuration, as well as using full-screen-exclusive mode finally adjusted and added an extra layer of smoothness that allowed for 0 hiccups in that scene no matter how many times I replayed it, and since then, everything has been smoother for me. Now every time before I watch content personally I switched my refreshrate to 50Hz and with my mpv settings it's perfect for me.

Here are my mpv configurations if you're interested. These run with my hardware, but doesn't mean they'll run with yours and also pick and choose only the important stuff, you don't need everything for just testing, for example all the lines for the shaders I use at the bottom when you scroll down the code can be removed. The section for changing my subtitles section can also be removed too.

ontop
priority=high

angle-flip=no

cache=yes
demuxer-seekable-cache=yes

ao=wasapi
audio-exclusive=no
audio-samplerate=48000
audio-format=s32
ad-lavc-downmix=yes
audio-channels=stereo

video-sync=display-resample
vulkan-swap-mode=fifo

osd-level=1

video-latency-hacks=no
demuxer-thread=yes

vo=gpu
profile=gpu-hq
fbo-format=rgba16hf
gpu-api=vulkan
gpu-context=winvk
hwdec=nvdec
spirv-compiler=shaderc

vd-lavc-dr=yes
vulkan-async-transfer
vulkan-async-compute

volume-max=100

tone-mapping=hable
tone-mapping-max-boost=1.0
hdr-compute-peak=yes

dither-depth=N
dither=fruit
dither-size-fruit=2

scale=ewa_lanczossharp
cscale=ewa_lanczossharp
dscale=ewa_lanczossharp
dither-depth=auto
correct-downscaling=yes
sigmoid-upscaling=yes

sub-ass-shaper=complex
sub-font-size=35
sub-scale-by-window=yes
sub-pos=100
sub-align-x=center
sub-align-y=bottom
sub-margin-y=3

sws-allow-zimg=no
zimg-fast=no

deband=yes
deband-iterations=4
deband-threshold=64
deband-range=16
deband-grain=48

ytdl-format=best

glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\noise_static_chroma.hook"
glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\noise_static_luma.hook"
glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\antiring.hook"

glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\KrigBilateral.glsl"

profile-desc=cond:get('height', 0) < 1440
glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\FSRCNNX_x2_8-0-4-1.glsl"
glsl-shader="C:\Users\musta\AppData\Roaming\mpv\Shaders\SSimDownscaler.glsl"
dither-size-fruit=6