Image File Types; Creating A Tga File With An Alpha Channel - Blackmagic Design ATEM Mini Manual De Instalación Y Funcionamiento

The file name for each loaded file is displayed underneath the slot so you can easily keep track
of files you have loaded. This is very useful as you will see a list of media pool still and clip
numbers and their file names in the media player palette on the switcher page.
Numbers are displayed on slots in the media pool to clearly show which slot is assigned to the
media player. When a media player slot is switched to the program output, the media player
number on the slot changes to red to indicate the slot is on air. When a slot is on the preview
output, the media player number changes to green.
ATEM Media Pool
On the switcher page, you can change the media player assignment from the media tab by
selecting your desired still from the 'media' dropdown list. Simply click on the arrow in the
player 'media' list to select from a list of media pool slots.

Image File Types

The ATEM media page can use many different file formats including TGA, PNG, BMP, GIF,
JPEG and TIFF.
Formats such as TGA include a separate 'alpha' channel together with the RGB color channels.
This lets you embed a matte, or key image, inside that alpha channel. When a TGA image is
loaded in the media player, ATEM Software Control will automatically detect the key image in
the alpha channel and load it as the linear key source. This means your TGA graphic will key
beautifully straight away with perfect transparency.

Creating a TGA File with an Alpha Channel

Below is a demonstration showing how to create a title in Photoshop with an alpha channel.
1 Launch Adobe Photoshop and start a new project. Set the project to use the same
horizontal and vertical dimensions used in your broadcast video format. For example,
if you are broadcasting 1080p50, set the resolution to 1920 x 1080 pixels.
2 In the layers panel, create a new layer and build the graphic you want to use. In this
demonstration, we are using a 'wedding' lower thirds graphic.
Using ATEM Software Control 35