The answer to this one is prolly very self-explanatory when looking at it one certain way, but I just havn't figured it out, so I need to ask you guys.

Check this out.
I have two clips of (the same) footage, but with different frame sizes. To make this example simple, assume that one is D1 (704x576px) and the other one is Half-D1 (352x576px), PAL ofc.

Now..

Would:

avisource("352x576.avi")
fluxsmoothst(7,7)

..be equal to..

avisource("704x576.avi")
fluxsmoothst(14,14)

..in the matter of softening ratio..? By looking at twice the frame size = the need for twice the softening threshold, by the fact that "each pixel would contain less change" on the larger frame size. Am I way out in the dark here? Just curious.



In short:
Does temporal/spatial smoothers (in general) take such a simple base fact as the actual frame size into account when deciding ratio for it's thresholds?