video.reset (new VideoContent (this));
shared_ptr<VideoMXFExaminer> examiner (new VideoMXFExaminer (shared_from_this ()));
video->take_from_examiner (examiner);
video.reset (new VideoContent (this));
shared_ptr<VideoMXFExaminer> examiner (new VideoMXFExaminer (shared_from_this ()));
video->take_from_examiner (examiner);