Blackmagic Design ATEM Mini Manual De Instalación Y Funcionamiento página 37

5 Your selection has now been used to create the greyscale matte in the alpha channel.
If you want to, you can now go to the 'menu' bar and click 'select/deselect' to remove
the selection marquee.
6 Now it's time to save your TGA file.
Go to the file menu and click on 'save as'. Type the filename and select the location for
your file. In the format box, select 'targa', which is the full name for a TGA file and make
sure the 'alpha channels' checkbox is selected.
7 Click 'save'. A targa options box will appear asking which resolution you want to save.
Select '32 bits/pixel'. This provides enough data for four 8 bit channels which includes
the red, green and blue color channels, plus the alpha channel. Click 'OK'.
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Your TGA file is saved.
Now you can open ATEM Software Control and load the file into the media pool.
From there, drop the graphic into the media player and the alpha channel you saved
will automatically be loaded into the media player key source. The key source uses
the greyscale image in the alpha channel to tell the linear keyer transparency values
for the graphic.
If you switch the linear key to air, you will now see the graphic keyed over the
background with perfect transparency.
Using ATEM Software Control 37