film_content_changed (boost::shared_ptr<Content> (), FFmpegContentProperty::SUBTITLE_STREAMS);
film_content_changed (boost::shared_ptr<Content> (), FFmpegContentProperty::SUBTITLE_STREAM);
film_content_changed (boost::shared_ptr<Content> (), FFmpegContentProperty::AUDIO_STREAMS);
film_content_changed (boost::shared_ptr<Content> (), FFmpegContentProperty::SUBTITLE_STREAMS);
film_content_changed (boost::shared_ptr<Content> (), FFmpegContentProperty::SUBTITLE_STREAM);
film_content_changed (boost::shared_ptr<Content> (), FFmpegContentProperty::AUDIO_STREAMS);