Posts: 13.098
Threads: 71
Joined: May 2017
To me vsnlm_ispc, vsnlm_cuda and KNLMeansCL all seem to produce the same output.
I'm rewriting a bunch of stuff there, to make things more user controlled, so you might want to try different settings under "Filtering->Vapoursynth->Misc->Prefer", since I will probably add more options there.
Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Posts: 38
Threads: 5
Joined: Jun 2026
...update to KNLmeans ..
I've just ran a test using KNLmeans on a video clip .. And the encode process speed wos like a astounding 80+ fps while using x264 preset very slow + heavy denoiser!?
This can't be right. I remember vividly the process took way longer to complete using a heavy denoiser like knlmeans (using very same hardware btw).. Even while using a gpu acceleration !?
Hence, this most certainly explains why the quality is so terrible (Quality VS Quantity/Speed) !
(Yesterday, 19:02)Selur Wrote: so you might want to try different settings under "Filtering->Vapoursynth->Misc->Prefer", since I will probably add more options there.
Cu Selur
Do you actual mean "Filtering->Vapoursynth->Misc->
Preview"?
Or the "prefer" settings under "Filtering->Vapoursynth->Misc->
Source" ?
I don't see "Filtering->Vapoursynth->Misc->Prefer" tab anywhere you see !
Posts: 13.098
Threads: 71
Joined: May 2017
Sorry, meant: "Filtering->Vapoursynth->Misc->Script->Prefer"
Just uploading a new dev (should be up in ~10min), which adds some additional controls there.
Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Posts: 13.098
Threads: 71
Joined: May 2017
Yesterday, 20:53
(This post was last modified: Yesterday, 21:11 by Selur.)
ah, forgot to update the scripts, will upload a new version in ~20min => upload is finished (last version for today)
Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Posts: 38
Threads: 5
Joined: Jun 2026
(Yesterday, 20:53)Selur Wrote: ah, forgot to update the scripts, will upload a new version in ~20min => upload is finished (last version for today)
Cu Selur
Thanks, i will download and have a look
Update: I have installed latest dev and checked again. Nothing has changed at all about knlmeans output quality.
A couple things i have noticed about that filter, is that i needs much MUCH higher strength values to notice any difference visualy ! And it does a bad job flatten / smoothen the image while retaining details at the same time compared to what it used to be

!!
That's the first thing that i emediatly noticed when using that denoiser again after a long time...
Changing the "prefer" settings under "Vapoursynth → Misch → script →
prefer" doesn't improve anything at all !
Maybe it's me , but i'll do an seperate install of an much older build of hybrid and see what the end results are using knlmeans with that build..
thanks anyway,*
Posts: 13.098
Threads: 71
Joined: May 2017
If you find a real difference let me know how the Vapoursynth Scripts differ.
Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.