What is a film opening?

A film opening can be defined as the first two to five minutes of a film where the main characters and setting are introduced, and the narrative is established, with all of this done in a certain manner that piques the interest of the viewer. The opening credits in which the actors and crew are introduced play throughout the film opening and the title of the film appears at the end of the film opening, a convention followed by nearly every film. Film openings vary according to genre, and the genre determines how the characters and narrative are established.