Writing exr with OCIO to jpg in COPs

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Hello everyone,

I am currently rendering frames with Mantra in OCIO, and then I am using COPs to modify my final image. But my goal is then to export the final frames to jpg. But obviously when I write my exr rendered with OCIO into jpg, I have a different image from the one I had in the render view and in the composite view. Does anyone knows which parameter I need to use before writing out my frames into jpg ? Do I need to do some sort of conversion in a vop ?

Thanks a lot,

Tom

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jsmack
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Lewul
Do I need to do some sort of conversion in a vop ?

Yes, currently the composite ROP does not provide ocio color conversion for output. Using a VOPCOP2 filter with an ocio convert node inside is the only way to bake the color transform in Houdini.

Alternatively, if you have access to the oiio tools, a shell program can be used to convert linear images to jpg with the ocio transform applied.
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Thanks for you answer jsmack.

I was indeed using this method, but I have no idea of what to put in the "From space" and "To space" values.

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Shouldn't that be Output-sRGB?
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You mean like this ?
I don't get the same image unfortunately.

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'From space' should probably be ACEScg.
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Can you show us what you get and what you expect? Also in VOP you plugged Blue value into Alpha.
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