Content (boost::shared_ptr<const Film>, DCPTime);
Content (boost::shared_ptr<const Film>, boost::filesystem::path);
Content (boost::shared_ptr<const Film>, cxml::ConstNodePtr);
+ Content (boost::shared_ptr<const Film>, std::vector<boost::shared_ptr<Content> >);
virtual ~Content () {}
/** Examine the content to establish digest, frame rates and any other