Lua script for mpv to write lines to a file

write_to_file.lua

local assdraw = require 'mp.assdraw'
local msg = require 'mp.msg'
local opt = require 'mp.options'
local utils = require 'mp.utils'

--[[
	Simple script to expose a command to write a line to a file.
	Example bind:
	v script-message write-to-file "/tmp/some_file" "Now playing: ${path} at ${playback-position}"
]]--

local SCRIPT_COMMAND_NAME = 'write-to-file'

function script_command_handler(filename, input_string)
	local file_object = io.open(filename, 'a')

	if file_object == nil then
		msg.error('Unable to open file for appending: ' .. filename)
		return
	end

	file_object:write(input_string .. '\n')
	file_object:close()
end


mp.register_script_message(SCRIPT_COMMAND_NAME, script_command_handler)

Thank you <3