Can I Convert an Old OBS PNG LUT Filter to a CUBE LUT?

[DJ Monopoli]

I have this old LUT I made for OBS back before OBS supported 3D CUBE LUTs where I brought the "original.png" file into Photoshop and color corrected it until I had a result I wanted, then exported that as a new PNG which I used as a LUT filter in OBS. I'm trying to manually remake this old filter as a 3D LUT so I can use it in Premiere and Photoshop because for some reason this particular PNG LUT I made a while back looks really good with our footage, but no matter what I do I can't seem to remake it. Is there some sort of conversion method to convert an OBS PNG LUT to a 3D CUBE LUT? Thanks!

 

[Reggie Lloyd-Jones]

Did you ever find a way to do this? I have the same issue.

 

[khaver]

There is an online converter here https://sirserch.github.io/lut-creator-js/ that can convert from a Hald CLUT (OBS LUT) to a .CUBE LUT.

 

[Suslik V]

@khaver OBS LUT and FFmpeg Hald CLUT has different formats and not compatible. Conversion is needed.

Spoiler: FFmpeg Hald CLUT neutral, 8-bit, 8x8x8 pixels

FFmpeg v4.x

Spoiler: OBS LUT neutral, 8 bit

OBS v29.x

Of course, user can add neutral_clut_ffmpeg.png to OBS as simple image source, apply any available OBS LUT to it and save screenshot of the filtered source via right-click menu - the adjusted FFmpeg Hald CLUT is ready! Then you can use online sites, utilities etc that can convert the FFmpeg Hald CLUT to any format you like.

 

[khaver]

@Suslik V, thanks for the clarification. Is there a reason OBS chose to use a proprietary LUT instead of something more universal like the Hald CLUT?

 

[Suslik V]

@khaver have no idea. It was at times when "new" OBS (multi-platform) has only few "cool" features/filters and there were proposed working code that do the job well.