chromakey, chroma key, green screen
  
 
 
 
 

Chromakey
     
 
This iMovie exercise teaches:
 


● How to combine a green-screen foreground shot with a real or CGI background
● How chroma key shots digitize effects Méliès &
others made a century ago
 
  1. Download these files—two green screen shots, two background stills, and audio (with reverberation and echo added) from a news conference held November 18, 1973.  
 
chromakey, chroma key, green screen
  
  2. Create a new iMovie widescreen project. Call it "Chromakey."  
  3. Drag "Washington_Monument_Panorama.jpg" into the workspace. Set duration at 29.6 seconds.  
  4. Import into iMovie "overtheshouldergreen960.mov." Drag it into the workspace atop the first frame of "Washington_Monument_Panorama.jpg. " Choose "Greenscreen." Set duration at 29.6 seconds.
  
  5. Drag "US Capitol.jpg" into the workspace after "Washington_Monument_Panorama.jpg".
 
  6. Import into iMovie "frontgreen960.mov." Drag it into the workspace atop the first frame of "Washington_Monument_Panorama.jpg. " Choose "Greenscreen."  
  Using the Clip Trimmer, trim away the first few frames of frontgreen960.mov" (in which the speaker removes his hat and brushes his hair). In the Clip Trimmer, determine the new duration of frontgreen960.mov. Set duration of "Washington_Monument_Panorama.jpg. " to the same duration. Play your movie.  
  You're done ! Want to play more?
  
 
 
  7. Add "nixon.mp3" to the project. (The voice will seem to synchronize only with the over-the-shoulder shot).  
  8. Add crowd noises, wind sounds, "microphone feedback"sounds, and any still or moving background you can imagine.  
  From his demi-life in the green screen, the man will address any audience you invoke. Your action will play, as this action does, in whatever cosmos you invent for it.