Green Screens (or blue screens) are commonly used in films and music videos as an aid to special/visual effects. It enables the makers of the product to remove and replace backgrounds, so it makes it looks like the subject is somewhere they are not (eg, space).
Green Screens can also be used in photography (album art work in this instance) for similar reasons.
It can be used to enhance costume, background and mise-en-scene in general. Perhaps used most famously in the Harry Potter films to create the invisibility cloak effect.
There are some rules:
- do not wear green, as then the subject will blend in with the background and be removed with it in post-production
- be aware of shadows (lit from front, back and sides) therefore not destroying the effect
- ensure there is a curve in the material, as there will be a cut off between the floor and background when the green screen is removed through the 'Chroma key' tool.
practical tips for music video filming:
- a multiple camera set up, to cover different angles - helps with continuity as you can have three shots playing over each other in Final Cut editing programme
- a floor manager to control music playback
- film the song all the way through, and ensure cameras are rolling at the same time - easier to edit and avoids have discontinuity between lip syncing and track.
Good knowledge shown.
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