• Adobe After Effects

  birds flying under the text in the skye???

  Posted by Paul Hanssen on November 17, 2011 at 12:04 am

  I have a video of some birds flying in the sky. (the cam was put on it’s back with the lens pointing at the sky and the birds flying over it)

  what i want, is to write a text in the sky and have the birds fly BELOW it, and not, as it happens now, that they fly above it. So in a way the text must be cear and transparant.

  I’m a beginner in AE, but learned basic techniques, but I can not figure out how to do it.

  I tried with Mattes, but some how i do not succeed.

  hope some one can be of some help.

  best regards,

  Paul

  John Cuevas replied 14 years, 9 months ago 4 Members · 3 Replies
• 3 Replies

• 

  Brian Charles

  November 17, 2011 at 12:35 am

  [Paul Hanssen] “I tried with Mattes, but some how i do not succeed.
  “

  You’ll need to isolate the birds somehow. Either by creating an alpha matte from the color information (do a search for Shift Channels), or rotoscoping the birds which may be next to impossible depending on the number of birds, duration of footage, quality of video, (interlaced or progressive) etc.
• 

  Tudor “ted” jelescu

  November 17, 2011 at 8:11 am

  If you have clear sky (blue) then it should be really easy. Use a keyer- Keylight is best, a smple Color Key may work as well- to eliminate the blue in the sky and just keep the birds. Comp that on top of the un-altered clip and put the text in between.
  If you have clouds then you may need to use a Luma Key.

  Tudor “Ted” Jelescu
  Senior VFX Artist
• 

  John Cuevas

  November 17, 2011 at 8:38 pm

  If the camera is locked down you could try using a differnce matte. It’s really a long shot, but I’ve managed to make it work on a few occassions.

  Johnny Cuevas, Editor

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