content->text.front()->set_type (TextType::CLOSED_CAPTION);
content->text.front()->set_language (dcp::LanguageTag("en-US"));
film->examine_and_add_content (content);
content->text.front()->set_type (TextType::CLOSED_CAPTION);
content->text.front()->set_language (dcp::LanguageTag("en-US"));
film->examine_and_add_content (content);