shared_ptr<VideoMXFContent> check = dynamic_pointer_cast<VideoMXFContent> (content);
BOOST_REQUIRE (check);
film->examine_and_add_content (content);
shared_ptr<VideoMXFContent> check = dynamic_pointer_cast<VideoMXFContent> (content);
BOOST_REQUIRE (check);
film->examine_and_add_content (content);