Why are captions on TV shows sometimes different from the words the actors say, but in ways that aren’t explainable by being misheard by a transcriber?

Question

For example, the actor in the movie just said “I’ve been saying that”, and the caption said “I’ve said that”. Do the transcribers have access to the screenplay, and use that as a starting point?

In: Other

Answer 1

Sometimes writing out the dialogue verbatim would take up too much of the screen. Rewording it can be just as effective as relating what’s going on, even if it has to take out some adjectives and shorten phrases.