boost::shared_ptr<Content> _content;
boost::shared_ptr<TextContent> _caption;
boost::shared_ptr<FFmpegSubtitleStream> _stream;
boost::signals2::scoped_connection _content_connection;
boost::shared_ptr<Content> _content;
boost::shared_ptr<TextContent> _caption;
boost::shared_ptr<FFmpegSubtitleStream> _stream;
boost::signals2::scoped_connection _content_connection;