• Adobe Premiere Pro

  Alpha Channel Puzzle

  Posted by Chris Tompkins on September 1, 2011 at 4:12 pm

  So I built this 1 sec. transition with Alpha Ch. in AE.
  I put in a scratch layer underneath and it looks right in AE.
  Render Out – Animation Codec (Mac)
  Using Screen Mode in the AE Comp.

  See pic:
  

  Then, in PP the before and after the lens flare alpha just fine. During the Lens Flare – No Alpha?

  

  

  

  Tried Premultiplied & Straight on the color.

  Probably something simple I’m missing here. Changing tools always sends a curve ball and causes frustrations!

  Chris Tompkins
  Video Atlanta LLC

  Chris Tompkins replied 14 years, 8 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Ben G unguren

  September 1, 2011 at 6:27 pm

  Lens flare doesn’t have an alpha channel in it. You could fake an alpha channel in AE (using, for instance, the “Shift Channels” filter after the lens flare filter, and setting Alpha to be the layer’s Luminance channel. But you may need to do a fair amount of alpha levels adjustment to make that work how you want it…

  A second option, which I like better, is to render out two videos — one with everything but the flare, and one with only the lens flare. Start and end each render at the same time, so things will line up easily in PPro, where you can set the flare above the other animation, and change the flare’s composite mode to screen or add.

  Ben Unguren
  Motion Graphics & Editing
  http://www.mostlydocumentary.com

  Some contents or functionalities here are not available due to your cookie preferences!

  This happens because the functionality/content marked as “Vimeo framework” uses cookies that you choosed to keep disabled. In order to view this content or use this functionality, please enable cookies: click here to open your cookie preferences.
• 

  Chris Tompkins

  September 1, 2011 at 6:53 pm

  BRILLIANT!!

  Appreciate it.

  Chris Tompkins
  Video Atlanta LLC

Reply to this Discussion! Login or Sign Up