MPV Lua Script X11, force resolution on fullscreen

force_resolutiuon.lua

function on_fullscreen_change(name, value)
    --[[
        xrandr | grep "HDMI-A-0 connected primary 1920x1080+0+0" && echo "true" || echo "false"
        xrandr | grep "HDMI-A-0 connected primary 3840x2160+0+0" && echo "true" || echo "false"
    --]]
    if value == true then
        local xrandr_response = os.capture('/usr/bin/xrandr | grep "HDMI-A-0 connected primary 1920x1080+0+0"')
        if xrandr_response == "HDMI-A-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 1600mm x 900mm" then
            os.capture('xrandr --output DisplayPort-0 --off --output DisplayPort-1 --off --output DisplayPort-2 --off --output HDMI-A-0 --primary --mode 3840x2160 --pos 0x0 --rotate normal')
        end
    else
        local xrandr_response = os.capture('/usr/bin/xrandr| grep "HDMI-A-0 connected primary 3840x2160+0+0"')
        if xrandr_response == "HDMI-A-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 1600mm x 900mm" then
            os.capture('xrandr --output DisplayPort-1 --off --output DisplayPort-0 --off --output DisplayPort-2 --off --output HDMI-A-0 --primary --mode 1920x1080 --pos 0x0 --rotate normal')
        end
    end
end
function reset_resolution(name)
    print("reset")
    local xrandr_response = os.capture('/usr/bin/xrandr| grep "HDMI-A-0 connected primary 3840x2160+0+0"')
    if xrandr_response == "HDMI-A-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 1600mm x 900mm" then
        os.capture('xrandr --output DisplayPort-1 --off --output DisplayPort-0 --off --output DisplayPort-2 --off --output HDMI-A-0 --primary --mode 1920x1080 --pos 0x0 --rotate normal')
    end
end

function os.capture(cmd, raw)
    local f = assert(io.popen(cmd, 'r'))
    local s = assert(f:read('*a'))
    f:close()
    if raw then return s end
    s = string.gsub(s, '^%s+', '')
    s = string.gsub(s, '%s+$', '')
    s = string.gsub(s, '[\n\r]+', ' ')
    return s
  end
mp.observe_property("fullscreen", "bool", on_fullscreen_change)

mp.register_event("end-file",reset_resolution)