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birds flying under the text in the skye???

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Paul Hanssenbirds flying under the text in the skye???
by on Nov 17, 2011 at 12:04:13 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


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Brian CharlesRe: birds flying under the text in the sky???
by on Nov 17, 2011 at 12:35:11 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.



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Tudor "Ted" JelescuRe: birds flying under the text in the skye???
by on Nov 17, 2011 at 8:11:14 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


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John CuevasRe: birds flying under the text in the skye???
by on Nov 17, 2011 at 8:38:58 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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