cycle_video_rotate

function cycle_video_rotate(direction)
-- Calculate what the next rotation value should be.
newrotate = mp.get_property_number("video-rotate")
if direction == "clockwise" then
newrotate = newrotate + 90
else
newrotate = newrotate - 90
end
-- Wrap value to correct range (0 (aka 360) to 359).
if newrotate >= 360 then
newrotate = newrotate - 360
elseif newrotate < 0 then
newrotate = newrotate + 360
end
-- Change rotation and tell the user.
mp.set_property_number("video-rotate", newrotate)
mp.osd_message("Rotate: " .. newrotate)
end

mp.add_key_binding(nil, "Cycle_Video_Rotate", cycle_video_rotate)