function auto_loop()
	local max = 20
	local file_duration = mp.get_property_number("duration", 0)
	print(file_duration)
	-- Images have a duration of 0, so don’t loop and use
	-- image-display-duration instead
	if file_duration == 0 then
		mp.set_property("loop-file", "no")
	-- If a GIF or video have duration shorter than <max> seconds
	-- make it loop for at least <max> seconds
	elseif file_duration < max then
		mp.set_property("loop-file", math.floor(max / file_duration))
	-- For longer file, play it only once
	else
		mp.set_property("loop-file", "no")
	end
	print(mp.get_property("loop-file"))
end

mp.register_event("file-loaded", auto_loop)