• Adobe After Effects

  Formats for chroma keying

  Posted by Johannes Nyholm on January 5, 2011 at 2:18 pm

  Hi,
  I wonder what would be the best and worst formats for green screen chroma keying of these:

  1. ProRes 1920i 422
  2. ProRes 1920i 444
  3. Uncompressed 1920 8-bits

  Thanks,
  Johannes

  Richard Van den boogaard replied 15 years, 8 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Richard Van den boogaard

  January 5, 2011 at 3:43 pm

  Hi Johannes,

  The more detail is recorded in the image, the better your key will perform when doing green screen work.

  Therefore, if you record in ProRes 4:2:2 or better yet 4:4:4, it will work better than a 4:2:0 encoded file. What will not help you much is transcoding of compressed 4:2:0 footage to 4:2:2 or 4:4:4 ProRes. As far as I know, there are not a lot of cameras that allow for native ProRes recording (ARRI Alexa does), although some cameras offer a 4:2:2 SDI output signal which can be recorded on a separate recorder.

  I don’t have experience yet how DSLRs perform with green screen work. Maybe someone here on the forum does…

  Richard van den Boogaard
  Freelance cameraman • Glidecam Operator • Editor • YouTube expert

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