dcpomatic::ContentTime dcp_to_content_time (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
dcpomatic::DCPTime content_time_to_dcp (std::shared_ptr<const Piece> piece, dcpomatic::ContentTime t) const;
std::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;
dcpomatic::ContentTime dcp_to_content_time (std::shared_ptr<const Piece> piece, dcpomatic::DCPTime t) const;
dcpomatic::DCPTime content_time_to_dcp (std::shared_ptr<const Piece> piece, dcpomatic::ContentTime t) const;
std::shared_ptr<PlayerVideo> black_player_video_frame (Eyes eyes) const;