[BUG] х265 main 422 10-bit - Crashed

[Selur]

The only documentation I'm aware of is the info over at https://www.spirton.com/interframe/ which is just what you quoted.
That said, Override aread, maps to 'area' in svpflow2 (https://www.svp-team.com/wiki/Manual:SVPflow), for which the documentation states:

Bad areas (identified by vector's SAD values) mask, more means "more strong mask". Recommended value is 100, but it can dramatically reduce smoothness effect.

So it's basically it is how strong the algorithm can smooth the content to ignore details for motion detection. For anime (=less details) you could smooth more than for normal content, where too strong 'smoothing' would cause you to miss motion, you would use smaller values.
If you want to understand the whole thing more, you would need to read up on how mvtools (https://htmlpreview.github.io/?https://g...ools2.html) works, which is what svp was based on.

Cu Selur