How to set RTX Super Resolution to match display resolution?

[ghost]

Hi, I set the config file so that mpv uses RTX Super Resolution to perform upscaling

vo=gpu-next
hwdec=d3d11va
gpu-api=d3d11
scale=ewa_lanczos4sharpest
vf=d3d11vpp=scale=2:scaling-mode=nvidia

Everything works fine. But is there a way to set scale={value} to automatically change depending on the starting resolution of the video file and the display that is being used?
So that I would get

scale=1             # for 2560x1440 > 2560x1440 and for 3840x2160 > 3840x2160
scale=1.3333        # for 1920x1080 > 2560x1440
scale=2             # for 1280x720 > 2560x1440 and for 1920x1080 > 3840x2160
scale=3             # for 1280x720 > 3840x2160
etc...

[Andarwinux]

function autovsr()
    display_width = mp.get_property_native("display-width")
    video_width = mp.get_property_native("width")
    display_height = mp.get_property_native("display-height")
    video_height = mp.get_property_native("height")
    pixfmt = mp.get_property_native("video-params/hw-pixelformat") or mp.get_property_native("video-params/pixelformat")
    if video_width ~= nil and display_width ~= nil then 
        scale = math.max(display_width,display_height) / math.max(video_width,video_height)
        scale = scale - scale % 0.1
        if string.match(mp.get_property("vf"),"@vsr") then
            mp.command("vf remove @vsr")
        end
        if scale > 1 then
            if pixfmt == "nv12" or pixfmt == "yuv420p" then
                mp.command("vf append @vsr:d3d11vpp:scaling-mode=nvidia:scale="..scale)
            end
        end
    end
end
mp.observe_property("video-params/pixelformat", "native", autovsr)
mp.observe_property("vf", "native", autovsr)

[ghost]

Oh wow, this is perfect, thank you so much!

[prochak96]

Hi, so how does one actually get this function running in mpv? Do I need to put this in a Lua script in the scripts folder?