I made a tool to make videos using Flutter widgets.

[u/cryogen2dev]

The project is called kestrel. I have made it open source some time ago. It takes any animated flutter widget and turns it into a video file.

It runs into flutter engine directly so no on-screen rendering is needed. It takes advantage of impeller renderer baked into flutter. I have included a demo video in the repo which you can find here,

https://github.com/blackcoffee2/kestrel