Key/Fill lower thirds over HDMI to the ATEM Mini Pro

Tutorial on sending Key/Fill from ProPresenter to ATEM Mini devices over HDMI, WITHOUT a DeckLink card.

Demonstrated on an ATEM Mini Pro, it should work the same for ATEM Mini, Iso, and Extreme.
Softwares used:
ISF Editor, to turn the Alpha channel into greyscale: https://isf.vidvox.net/desktop-editor/
Symon, to fullscreen the Syphon output: https://github.com/keijiro/Symon

Other tips:
-The ISF output window needs to be always visible, or it will stop rendering and appear to freeze. Leave it running in the corner, so a little bit is visible on your screen.
-ISF Editor comes with a ton of defaults, you want to load the System ISFs.
-You can use ProPresenter directly into the Fill, however I run both Key and Fill through Symon, so they have a similar workflow, and hopefully cause less latency between frames.
-Running screens at 30fps has the Key and Fill in sync. If I run at 60fps they aren't in sync. YMMV.
-You could do this using NDI (with Alpha channel enabled) to a second computer. Syphon2NDI might help you convert SNDI back into Syphon to run through ISF Editor.
-Windows 10: I demonstrated on Mac, but ISF Editor has a beta out for Windows, which probably uses Spout. ProPresenter on Windows doesn't have Spout, however it should work fine with NDI. You'll just need to add another step, and convert NDI into Spout, using the free Spout to NDI (https://leadedge.github.io/).
-If you find a better way to do this, great. Comment for other people.

If you're unfamiliar with Syphon: it's a Mac-only way for video softwares to pass live video between each other. Spout is the Windows equivalent, and they're both like NDI, except they're internal to a machine, while NDI sends video over a network.

Видео Key/Fill lower thirds over HDMI to the ATEM Mini Pro канала Fascinate Visuals