Adobe After Effects Forum
Keying
Keying
by ola sanda on Nov 15, 2014 at 8:48:28 pm

Hi there.



Trying to make some keying, but I can't get it working.

Any suggestions ?

Ola


Re: Keying
by Tudor "Ted" Jelescu on Nov 16, 2014 at 7:02:15 am

I would try to use a second instance of the footage precomposed as a matte channel. Inside the precomp I would play with Levels after I take out the color. A black solid with some garbage mattes my be necessary to fill in the characters.

Tudor "Ted" Jelescu
Senior VFX Artist


Re: Keying
by ola sanda on Nov 16, 2014 at 7:16:02 am

Thanks Ted,

But I don't quite understand :(

I get it, that I can make adjustments to optimize it. But before all that, should'nt it isolate the objects from the background, just by dragging this effect on to the composition and then AFTERWARDS I can make adjustments ?

Nothing happens when I just drag the effect on the comp.

Ola


Re: Keying
by Tudor "Ted" Jelescu on Nov 16, 2014 at 2:59:07 pm

Duplicate the layer.
Precompose the duplicate.
Inside the precomp apply Hue/Saturation and take down saturation.
Apply Levels and adjust to get good contrast.
Then go back to the main comp and on the initial layer apply the Channel/Set Matte effect and select the precomp as the source (Use For Matte set on Luminance and Invert Matte checked).
Go back in the Precomp and create a white and a black solid. Create garbage masks to fill in the character shapes and clean up the white.

Tudor "Ted" Jelescu
Senior VFX Artist


Re: Keying
by ola sanda on Nov 18, 2014 at 4:44:05 am

Thanks Ted,

Sounds a bit complicated for my beginner level, but I will give it a try :-)

Ola


Re: Keying
by ola sanda on Nov 21, 2014 at 11:04:42 am

Hi Ted.

Thanks again for the detailed answer ! :-)

I have now tried this, at my beginner level, and have made some screen shots and would highly appreciate it, if You would take the time, to go through my screen shots and tell me, where I am failing at.

1. Precompose the duplicate.




2. Inside the precomp apply Hue/Saturation and take down saturation.




3. Apply Levels and adjust to get good contrast.





4. Then go back to the main comp and on the initial layer apply the Channel/Set Matte effect and select the precomp as the source (Use For Matte set on Luminance and Invert Matte checked).




5. Go back in the Precomp and create a white and a black solid. Create garbage masks to fill in the character shapes and clean up the white.




I made it this far, I THINK, but don't really know what to do next. Can You please describe further, what to do with the masks and if I have misunderstood part of the instructions ?

Thnx :-)

Ola





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