Yes I got it running yesterday and now I can have it the way I want it.
in potplayer I have ffdshow raw on default profile and avisynth with a hdr profile had to disable the built-in video transform filter to get it working

The audio was going out of sync @ 48 frame so I switched to screen refresh and the audio stayed in sync.

Is there a way to get svp 4 to use more cpu power?  im using an AMD R3900X and 2070 SC

Because ffdshow works just fine for non HDR but when I use this in HDR I don't get bt2020 only bt709, but avisynth  will show bt2020 under ctrl J
I always have SVP running on all of my videos

I only want to use avisynth only with HDR but how do it create my own option to do so.

otherwise I want avisynth disabled