• Apple Final Cut Pro Legacy

  Alpha Channel Problems

  Posted by Randolph Harrison on January 29, 2008 at 6:58 am

  Hey Guys,

  I am trying to put a muzzle flare over a pistol being fired. I have captured a flare from video which also contains an alpha channel with black backgrounds.

  I have my main picture with the pistol on Video 1. I have tried the alpha channel on V2 and then switched to V3 but I still see the black background. I have also checked alpha in the edit-format menu.

  What am I doing wrong? Do I also need to add a superimposure or difference mat? Sorry, sort of new to this.

  Thank you very much.
  Randy

  Randolph Harrison replied 18 years, 3 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Tom Wolsky

  January 29, 2008 at 11:36 am

  The matte layer goes on the lower track, like V2. The muzzle flash video goes on the upper track, like V3. The V3 clip has the composite mode applied, travel matte luma or alpha, whichever is appropriate.

  All the best,

  Tom

  Class on Demand DVDs “Complete Training for FCP6,” “Basic Training for FCS2” and “Final Cut Express Made Easy”
  Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 3.5 HD Editing Workshop”
• 

  Scott Skaja

  January 29, 2008 at 3:44 pm

  You may also want to try an additive key in the composite mode, it may give a better, more believable key than using your alpha.

  Scott Skaja
  edit/design/animation
  http://www.scottskaja.com
• 

  Randolph Harrison

  January 29, 2008 at 6:33 pm

  Thanks guys!

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