+ list<shared_ptr<Font> > fonts = _player->get_subtitle_fonts ();
+
+ if (fonts.size() > 1 && _film->interop()) {
+ /* Interop will ignore second and subsequent <LoadFont>s so don't even
+ write them as they upset some validators.
+ */
+ shared_ptr<Font> first = fonts.front ();
+ fonts.clear ();
+ fonts.push_back (first);
+ }
+
+ _writer->write (fonts);