Script to dump mpv properties with

dump_properties.lua

local utils = require 'mp.utils'
local msg = require 'mp.msg'

--[[
	Simple script to dump all available properties, optionally to a file.

	Open console and type:
		script-message dump-properties
	Append a filename to write to:
		script-message dump-properties props.txt

	Example input.conf bind:
		ctrl+d script-message dump-properties /tmp/all_properties.txt
]]--


function dump_properties(output_path)
	local properties = mp.get_property_native("property-list")

	-- Optionally, write to a file
	local output_file = nil
	if output_path then
		output_file = io.open(output_path, 'w')
		if not output_file then
			msg.error(("Unable to open file %q for dumping properties"):format(output_path))
			return
		end
		msg.info(("Writing %d properties to file %q"):format(#properties, output_path))
	else
		msg.info(("Dumping %d properties"):format(#properties, output_path))
	end

	for _, name in pairs(properties) do
		local value = utils.to_string(mp.get_property_native(name))

		if output_file then
			output_file:write(('%s\t%s\n'):format(name, value))
		else
			msg.info(("%s\t%s"):format(name, value))
		end
	end

	if output_file then
		output_file:close()
	end
end

mp.register_script_message('dump-properties', dump_properties)