>>71575729
Alright I got that, but for whatever reason I can't get set it to display the new title on the osd-bar.
[code]
mp.set_property('media-title', decoded)
[/code]
does nothing. Maybe someone else can help you out with that part.

As for the rest, here's the script:
[code]
mp = require 'mp'

local decode_needed = false

function decode(title)
    local res = io.popen(string.format('%s "%s" | %s',
        'echo', title, 'iconv -f="windows-1251" -t="utf-8"'))

    return res:read('*all')
end

function on_title_changed(name, title)
    if decode_needed then --and not ignore_next_call then
        local decoded = decode(title)
        print(title, '->', decoded)
        mp.osd_message(decoded)
        mp.set_property('media-title', decoded)
    end
end

mp.observe_property('media-title', 'string', on_title_changed)
mp.add_hook('on_load', 50, function()
        local filename = mp.get_property('path', nil)
        decode_needed =  string.find(filename, 'ru')
    end)
[/code]
It'll run on every page with "ru" in the name, see
[code]
string.find(filename, 'ru')
[/code]

Obviously, you should delete the
[code]
mp.osd_message(decoded)
[/code]
part after you figured why
[code]
mp.set_property('media-title', decoded)
[/code]
doesn't work.