First of all, thank you so much for this wonderful software. 
I'm curious if it would be possible to add the AQ Mode 4 option for the x265 encoder. Currently the options go 0 to 3, but AQ mode 4 is available since Version 3.2 which is "with variance and edge information."
A little more about AQ mode 4:
The AQ enabled with auto-variance and edge information (aq-mode 4) is additional support that we are providing over the aq-mode 2 (AQ with auto-variance). We have enabled a Gaussian LPF for noise removal and an edge filter that highlights the noiseless edges information and its directions in the pictures. Considering these parameters, we have modified the QP for every block. The particular well-suited use-cases for this mode will be videos with high edge contents. (Ex: Ducks take off, Crowd run, Raindrops etc).
From: https://www.mail-archive.com/x265-devel@vid…g/msg11661.html
Many thanks! 
