Difference between a film opening and trailer

Difference between a trailer and a film opening

feature	Trailer	Opening	Example
Text	Sometimes, may help them to understand the plot or show characters names or key quotes	Maybe, the text at the start of the film might say a location name, dialogue or a character’s name
Voice over	Sometimes, the voice over can help viewers understand the plot	No but there may be a narration
Music/sound track	Yes, to establish genre	Yes, to establish genre or era of the film
Company ident	Yes	Yes
Film realise date	Yes	No, they’re at the film already
Actor/actress/director/producer names	Yes, but often only key people’s names and a billing block for everyone else	Yes, in the opening credits of the film which is usually in the film opening then there will also be credits of everyone at the end of the film
Certification message/rating card	Yes, To inform the audience about if the film is suitable for them or their family	Yes and often with the name of the film so the audience know they are watching the correct film
Establishing shot	Yes, so you know where the film is set	Yes, so you know where the film is set and at what time period
Clips of film	Yes, small clips of the film are shown. Normally small action shots of reaction shots and shots are taken throughout the film to show the overall plot of the film but it doesn't give anything major away so it makes you want to see it.	Yes
Cutting rhythm	Fast cutting rate normally, to try and fit in lots of small clips into 2 minutes	Might vary depending on the genre of the film or what’s happening during the start of the film
			The examples were taken from the trailers of the hunger games-catching fire and the impossible