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For more information, please see full course syllabus of Adobe Premiere Pro CS6
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Compositing and Green Screen

  • An alpha channel allows opacity in an image, either still or moving
  • Compositing is using alpha channels, either already present or created in real time, to overlay a different image into a video
  • Titles automatically have an alpha channel, which covers everything in the title except the actual words
  • Keying is a type of compositing where you choose a color to remove and replace
    • Blue and Green are the most common types
    • Blue for night scenes works best
    • Green for day scenes works best
    • Make sure your actors don’t wear the same colors as your screen!
  • A track matte is used to cover a track when you don’t have a specific color to screen out

Compositing and Green Screen

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Alpha Channels 0:29
    • What are Alpha Channels?
  • Compositing 2:07
    • Why do Compositing?
  • Using the Opacity Fixed Effect 3:28
    • Using the Opacity Fixed Effect
    • Blend Mode
  • Using Alpha Channel Transparencies 7:42
    • Alpha Channel Transparencies Overview
    • Title & Alpha Channel
  • Keying 9:51
    • What is Keying?
    • Keying a Green Screen: Chroma Key
  • Using Track Matte Key 15:32
    • Using Track Matte Key