Detect DaVinci final render on an OpenFX plugin

Good Morning.

I am currently work on an OpenFx Plugin target for a DaVinciResolve host and I would like that my plugin should be able to distinguish a preview render from a final render, the one performed in the Delivery page of DaVinci.

I would ask you if there is a way from an OpenFx plugin to detect it.

I have checked OpenFx flags as "kOfxImageEffectPropSequentialRenderStatus", kOfxImageEffectPropInteractiveRenderStatus" and "kOfxPropIsInteractive" but I did not find differences between the preview and the final render.

Also I have tried to integrate inside the OpenFx plugin some python code which uses the DaVinciResolve script Python Api but It crashes when I try to load the fusionscript.dll in the Resolve context.
Instead everything is fine when I use the same code in a standalone c++ program.

So I would ask you if is it possible from an OpenFx plugin to access the Resolve python Api and if there is a lock mechanism which is preventing it. In that case I would ask you which should be the correct way for an OpenFx plugin to access it.

Your request doesn't make any sense. The exported file doesn't exist in Resolve.

What's the difference between a preview render and a final render?

Good Morning.
.../...from a final render, the one performed in the Delivery page of DaVinci..../...

Hello,
See in Pipeline Processing in manual where you can use OFX. Not possible entry in Delivery Page at this time.

What's the difference between a preview render and a final render?

The preview render is a Cache file. The final render is the exported file. The latter exists solely outside of the software, which is why this request is weird.

The preview render is a Cache file. The final render is the exported file. The latter exists solely outside of the software, which is why this request is weird.

Final exported file does not appear from thin air, Resolve is rendering that and to do that, it is requesting ofx plugin to do its work.

As I understand it, question is about probing whether ofx plugin engine is requested in timeline render or delivery render state. Don't see anything weird in that. Whether it is possible or not is probably a question for software development subforum, some dev can maybe answer about it. If you don't get a difference in these flags resolve as a host probably does not fill them in.

question is about probing whether ofx plugin engine is requested in timeline render or delivery render state.

Ahhh, that makes more sense. The way it was worded, I thought something different.