std::vector<std::shared_ptr<dcpomatic::Font>> get_subtitle_fonts ();
std::list<ReferencedReelAsset> get_reel_assets ();
dcp::Size video_container_size () const {
std::vector<std::shared_ptr<dcpomatic::Font>> get_subtitle_fonts ();
std::list<ReferencedReelAsset> get_reel_assets ();
dcp::Size video_container_size () const {