Weird Artifacts With Slow Motion / Frame Interprolation

I am getting weird artifacts when slowing footage shot at 29.94fps down to 23.97 fps.

I wanted to get the "best" quality so in the Frame Interpolation preferences, I have it set as the following:

Retime Process: Optical Flow

Motion Estimation Mode: Better

Motion Range: Medium

I noticed that if I stick with the "default settings" for Frame Interpolation (Nearest, Faster, and Medium), that I DON'T get those weird artifacts.

So if Optical Flow is supposed to be "better" than Nearest, why am I getting these aritfacts?

Is it because my Graphics card is only a GTX 960 2GB ?

What would be the best settings to use for Retime Process that would avoid the artifacts?

Thanks in advance.

There is no process in Resolve to completely avoid artifacts here. Even the best flow motion plug-in (IMHO) may have trouble handling that, but try Twixtor in the demo version.

Currently there is no software that can replace a true slo-mo from the camera.

There is no process in Resolve to completely avoid artifacts here. Even the best flow motion plug-in (IMHO) may have trouble handling that, but try Twixtor in the demo version.

Currently there is no software that can replace a true slo-mo from the camera.

Thank you for the info and the suggestion. I will try it.

But I guess what you are saying is: "shoot at the frame rate you are going to use," right?

Thanks in advance.

Yes. Any change in framerate which needs calculation of frames that were not recorded will produce some artifacts. What you are seeing on repetitive structures is quite typical.

Yes. Any change in framerate which needs calculation of frames that were not recorded will produce some artifacts. What you are seeing on repetitive structures is quite typical.

Thanks for that confirmation. I appreciate that.

There is software that allows the artist to set boundries so the motion estmation knows where the edges are that need to be respected are and works on either side of the boundry

another option is to roto to seperate layers, create clean plates, optical flow each layer sepreatly, and then comp them back together.

Mamba's optical flow is pretty good, maynbe worth testing

There is software that allows the artist to set boundries so the motion estmation knows where the edges are that need to be respected are and works on either side of the boundry

another option is to roto to seperate layers, create clean plates, optical flow each layer sepreatly, and then comp them back together.

Mamba's optical flow is pretty good, maynbe worth testing

Thank you. I will have to look into roto and mamba. I assume we are not talking about music or dance styles here, huh???