void idle_handler ();
void request_idle_display_next_frame ();
void film_change (ChangeType, Film::Property);
void recreate_butler ();
void config_changed (Config::Property);
void film_length_change ();
void idle_handler ();
void request_idle_display_next_frame ();
void film_change (ChangeType, Film::Property);
void recreate_butler ();
void config_changed (Config::Property);
void film_length_change ();