dcp::Size const container_size = film->frame_size ();
dcp::Size const scaled = scale().size (dynamic_pointer_cast<const VideoContent> (shared_from_this ()), container_size, container_size, 1);
dcp::Size const container_size = film->frame_size ();
dcp::Size const scaled = scale().size (dynamic_pointer_cast<const VideoContent> (shared_from_this ()), container_size, container_size, 1);