Mailing List AE-List@media-motion.tv — Message #63449
From: Peter McAuley <AE-List@media-motion.tv>
Subject: Re: [AE] Primatte Keyer
Date: Thu, 23 Nov 2017 10:56:31 -0500
To: After Effects Mail List <AE-List@media-motion.tv>
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And sorry Eric, I just realized that I referred to the category by its previous name. The correct name is BCC Key and Blend. 

On Nov 23, 2017, at 10:04 AM, Mr. Eric D. Kirk <AE-List@media-motion.tv> wrote:

Hey Peter,

I made the purchase of Primatte Keyer, studio, whatever it's called. lol  But I can't find it in my effects panel after installing and registering.

Eric

On Wed, Nov 22, 2017 at 9:07 AM, Peter McAuley <AE-List@media-motion.tv> wrote:
I think you'll really enjoy working with the Primatte Studio keyer - should you need any assistance understanding any of the features please feel free to contact me directly. 

Cheers,

Peter. 

On Nov 22, 2017, at 8:55 AM, Mr. Eric D. Kirk <AE-List@media-motion.tv> wrote:

Tons of great comments here.  I also noticed reference to 3D.  I'll be buying the Boris Keying suite.

Eric

On Tue, Nov 21, 2017 at 9:33 PM, Teddy Gage <AE-List@media-motion.tv> wrote:
I have been using Fusion Studio 9 and the keying is top notch. The new Delta keyer is fantastic, and you can combine with ultimatte (their version of primatte)

The trick to keying is always using multiple keys and combine. It's rare one key will solve every corner of your screen 

On Tue, Nov 21, 2017 at 7:28 PM Chris Zwar <AE-List@media-motion.tv> wrote:
On 22 Nov 2017, at 8:15 am, Jim Curtis <AE-List@media-motion.tv> wrote:
>
> I have only demo-ed Primatte, and am no expert on it, but I can say a couple of things:  The price from RG was so steep as to deter me from buying it, and Keylight, created by The Foundry is native in Ae and is a very good keying plug-in.
>
> IMO, it’s worth taking the time to learn Keylight by watching a few advanced tutorials.  It may be all you need.

I have often contemplated writing an article that looks at how different keying plugins work, there are a few basic approaches.  Keylight is my go-to plugin because it comes with AE, however the last time I had to do keying I was very surprised to discover that I got better results with the old AE 8-bit “Color Range” keyer than with Keylight.  Go figure… I will experiment more with this in the future.  I find Keylight crashes constantly with AE 2017, which is why I have been trying alternatives.

Primatte works in a totally different way to Keylight, so they are likely to give different results with different footage.  Keylight is a difference keyer, and works by looking at the difference between the Red, Green & Blue channels.  A more advanced version of putting a green solid on top of your footage and choosing the difference blending mode.  This is why it only really works with green or blue screens.

Primatte is an advanced linear keyer, although I recall their marketing using the term 3D keyer (maybe I’m remembering incorrectly).  Basically, imagine an RGB value plotted on a graph as an X,Y,Z co-ordinate.  Every colour will have a different position in a cube where the axis are represented by R,G,B values.  Primatte compares the position of each pixel with the position of the main key colour, as if they are co-ordinates in 3D space, and uses the distance and direction to calculate if the pixel is transparent or not.

Always fun to discover what’s happening under the hood…

-Chris




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