-- write to file when exiting the player or switching file
        function on_file_end(event)
            local message = totaltime .. "s, " .. timeloaded .. filename
            local file = io.open(logpath, "a")
            local lines = {}
            if not paused then totaltime = totaltime + os.clock() - lasttime end
            if file_exists(logpath) then
                for l in file:lines() do
                if not l:find(message, 1, true) then
                lines[#lines+1] = l
                file:write(message)
            end
        end
        file:close()
        mp.osd_message("test")
    end
end