Suppose you’re shooting a movie. The actors do their work, and you also record their voices while they’re acting. Additional audio stuff like music and sound effects is added later.
But now suppose you want to dub the movie in another language. You can’t just slap music and stuff onto the project, but you (somehow) need to remove the voices of the original actors and then slap those of the new voice actors onto the film. Except if you cut that out, you’d also have to cut out all environmental noise, etc. And if you do that, you’d basically have to recreate every single sound required.
So how exactly does this work? Are movies shot with and without sound simultaneously? Or is there some technological means to separate the sound from the image?
In: Technology
Dialogue is recorded live completely separate from video. It is mixed in later, and the actors often dub it in later if needed. Sound effects, music, background noise are all added in later.
There is a great John Travolta movie from the 70s called Blow Out where he plays a film audio engineer that show a lot about how the process works
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