DCPTime subtitle_end () const;
FrameRateChange active_frame_rate_change (DCPTime, int dcp_frame_rate) const;
std::string content_summary (DCPTimePeriod period) const;
DCPTime subtitle_end () const;
FrameRateChange active_frame_rate_change (DCPTime, int dcp_frame_rate) const;
std::string content_summary (DCPTimePeriod period) const;