1
Using for Capture and Playback
Blackmagic Design Applications
Blackmagic On-Air 2.0 for Mac Pro
How to create alpha channels for keying
1. Open your logo in Photoshop.
2. To make your graphic easier to see, make a new layer, fill
it with white and send to the back.
3. Duplicate the logo layer.
4. Select the bottom logo and apply the
minimum
filter.
This will expand the graphic slightly so it keys better.
5. Select the layer transparency from the top logo by
command or control clicking on the layer thumbnail and
click
Save selection as channel
.
6. Flatten and save with alpha channels. Your graphic will be
in RGBA format for On-Air or NLE use.
