how can i get the currently showing subtitle line?

[ekaunt]

im trying to make an extension that will look up the currently showing subtitle line on the internet.
how can i get the currently showing subtitles from lua?

[mederi]

You can parse external subtitle file.

[ekaunt]

thats what im doing now, but i only have it for *.srt.

i was hoping that vlc gives me a way to do it, cuz its already able to parse all the various subtitle formats, so why should i reinvent the wheel.