text.clear ();
text.push_back (make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::UNKNOWN));
_subtitle_stream = _subtitle_streams.front ();
text.clear ();
text.push_back (make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::UNKNOWN));
_subtitle_stream = _subtitle_streams.front ();