Hello! After rendering in MPlay in Karma using OCIO (It seems to be used), I export the video in mp4 format (ffmpeg mp4 is used) and the picture on the exported video is noticeably different from the one in Mplay. Help me figure out what I'm doing wrong and how to solve this problem so that the color in the exported video is the same exactly as in MPlay

Did you bake in the ocio view transform before converting to a movie?

hoiiotool -i in.#.exr --iscolorspace "ACES - ACEScg" --ociodisplay "ACES" "sRGB" -d uint8 -o out.#.tif
Alternatively, use the output display transform enumerated by the config (only ocio 1.X configs will do this) with an ocio transform VOP in a composite network.

Then use ffmpeg on the resulting image sequence

jsmack
Did you bake in the ocio view transform before converting to a movie?

hoiiotool -i in.#.exr --iscolorspace "ACES - ACEScg" --ociodisplay "ACES" "sRGB" -d uint8 -o out.#.tif
Alternatively, use the output display transform enumerated by the config (only ocio 1.X configs will do this) with an ocio transform VOP in a composite network.

Then use ffmpeg on the resulting image sequence

You know, I'm just learning how to work in Houdini and I'm a little confused about what you're talking about. As you can see, I just set the values ​​in the karma settings, in Mplay itself I set slightly different values ​​after rendering and decided to export everything via ffmpg. I don't understand how to use OCIO View transform. I understand that you need to enter what you wrote somewhere, but I don’t know where to do it and how (( Please tell me.

asrgnii
As you can see, I just set the values ​​in the karma settings, in Mplay itself I set slightly different values ​​after rendering and decided to export everything via ffmpg.

Unfortunately, it's not possible to to export a movie that looks like the view in Mplay. You could use Nuke to export a movie with the color transform baked in. The only free way I know of is to use command line tools, or the VOPCOP in Houdini.

asrgnii
I understand that you need to enter what you wrote somewhere, but I don’t know where to do it and how (( Please tell me.

You need to enter that on the command line, or use a generic generator in PDG. Sorry, this isn't straightforward and is a very advanced operation.

Since you have an OCIO 1.X config, you can probably just use the composite network in Houdini to do the color space conversion using the OCIO Transform VOP with the "VOP2COP Filter" node.

asrgnii
You need to enter that on the command line, or use a generic generator in PDG. Sorry, this isn't straightforward and is a very advanced operation.

Since you have an OCIO 1.X config, you can probably just use the composite network in Houdini to do the color space conversion using the OCIO Transform VOP with the "VOP2COP Filter" node.

Thank you very much, now I understand what is at stake. On the site it is described how to do this, I will study to sit. You helped a lot.

For anyone having the issue with this kind of process :
Copernicus > mplay > mp4 > weird colors :
Fix is : copernicus (rop image output ) = colorspace as "raw"
Then in mplay export mp4 as baked display view / default + aces 1
Now mp4 look like render.