Iv'e got a scene in disco where the subjects move quite quickly. How can I minimise the motion artefacts? What are the best settings? It looks sometimes quite 'digital' as if filtered with a median filter and sometimes there are ripple-like structures on the faces as if processed with wavelets.
Without knowing your current settings, nobody can advise specifically. You may simply need to reduce the motion threshold.
I've experimented for a while now and setting the error threshold to 10 (from 1) and the motion detail to 5 makes it look pretty good. The error threshold essentially decides when to switch to frame blending instead of motion estimation. With a motion detail of 5 the motion vectors are quite coarse and the hopping looks natural. Hope that saves somebody else's time!