Media

Update media

To update the media, you need to use the ATEM Software Control.

Image format

Images in the ATEM Mini media pool must meet the following requirements:

• Resolution: matches the active video standard (i.e. 1920×1080 for HD)

• Format: PNG or TGA with an alpha channel (RGBA)

• Alpha: pre-multiplied — the RGB channels are already multiplied with the alpha channel

Important

Pre-multiplied alpha is required so the ATEM’s downstream keyer can composite overlays (e.g. lower thirds) cleanly. Without it, semi-transparent edges show dark or light fringes against the program output.

See also

• Automate image with alpha transparency to ATEM (Reddit)

• ATEM Mini media pool with alpha (YouTube)

ffmpeg export

ffmpeg can scale and pre-multiply an existing RGBA image in one step:

ffmpeg -i input.png -vf "scale=1920:1080,premultiply=inplace=1" output.png

The resulting output.png matches the ATEM media pool requirements and can be uploaded directly via ATEM Software Control.

Photoshop export

The easiest way to produce a compatible file is to export from Adobe Photoshop via the ATEM Switcher Media Pool plugin, which pre-multiplies automatically.

Just ensure you’ve a transparent background, then go to:

• File

• Export

• ATEM Switcher Media Pool…