OptiX denoiser as filter in ffmpeg

It is just an idea. Is it possible to add such a filter? It would be useful if lossless video capture of path traced scene is to be denoised later. Say, OptiX 7.5+++ can provide better denoise quality or some tweaks in the future. It would be nice if one can apply different filters to retrospective path traced cinematics.
Also there is NVIDIA Real-Time Denoiser (DesignWorks). It has another dimension - temporal, and also requires many inputs. Can it also be filter in ffmpeg?