- std::list<boost::shared_ptr<ContentImageSubtitle> > get_image_subtitles (ContentTimePeriod period);
- std::list<boost::shared_ptr<ContentTextSubtitle> > get_text_subtitles (ContentTimePeriod period);
+ std::list<ContentImageSubtitle> get_image_subtitles (ContentTimePeriod period, bool starting);
+ std::list<ContentTextSubtitle> get_text_subtitles (ContentTimePeriod period, bool starting);