Can I apply D-noise to a folder of rendered stills of an animation? I wanted to apply the D-Noise filter to an animation and I suppose there must be a way to apply it as each still is rendered but I couldn't find it and had to start my render to meet a deadline. My stills are pretty noisy as I am using emission so would be great if there is some way to apply it to a folder.

I'm sure there is a way in Python but I cannot really do anything at all in Python so please any other way.
So it just turns out that if you render to stills and then use the Blender video sequencer to run those stills together into a video file you can just enable D-Noise at the bottom of the view 'Layer tab' - it slows things down a fair bit but it works a treat.