Changing shape mask

Changing shape mask

by jim bachalo

on May 17, 2013 at 2:52:17 am

Need some expert advice as to the best method of approaching this masking problem where the mask changes shape as the shot changes perspective.

In the following low res render I need to separate the building from the sky but the building changes perspective as the camera pans down.

https://vimeo.com/66372643
pw 1dc

Can this be done all within AE, or do I need some 3rd party masking tool?
The original is 4K.
Thanks for any tips or suggestions.

Local is the new global

Re: Changing shape mask

by chris brett

on May 17, 2013 at 9:59:31 am

Hi Jim

--------------- if you are simply changing the sky then I reckon its worth trying a luma key / chroma key which I reckon will do most of it then you will just need to fiddle with the left hand corner a bit.....

--------------------------------------------- chris --

Re: Changing shape mask

by Ridley Walker

on May 17, 2013 at 3:10:13 pm

Have you tried animating the mask shape?

The shot doesn't look to difficult to rotoscope in After Effects.

Or use Mocha, see:http://library.creativecow.net/devis_andrew/AE_Rotoscoping-Mocha/1

Re: Changing shape mask

by jim bachalo

on May 17, 2013 at 7:12:27 pm

Thanks! As a first step will try keying. If that doesn't do the trick will give rotoscoping a try!

Local is the new global

Re: Changing shape mask

by Ridley Walker

on May 17, 2013 at 8:38:21 pm

Say hi to Rob Ford ;)