boost::mutex _filter_graphs_mutex;
dcpomatic::ContentTime _pts_offset;
boost::optional<dcpomatic::ContentTime> _current_subtitle_to;
/** true if we have a subtitle which has not had emit_stop called for it yet */
boost::mutex _filter_graphs_mutex;
dcpomatic::ContentTime _pts_offset;
boost::optional<dcpomatic::ContentTime> _current_subtitle_to;
/** true if we have a subtitle which has not had emit_stop called for it yet */