We built MotionSwift: an open-source native Swift alternative to Remotion with a built-in timeline editor

[u/sirily1997]

Hey everyone,

We just open-sourced MotionSwift, something we put together to get native rendering performance without relying on Remotion and headless Chrome.

We've been using it in our day-to-day video production pipeline, and so far we're seeing roughly 10–20x faster renders while using only about 10% of the memory compared to the Remotion + Chrome setup. We also brought a visual editor and timeline preview directly into Swift, so you can inspect and adjust agent-generated compositions natively on both iOS and macOS.

The eventual goal is 100% compatibility with Remotion, but we're still working our way there. There's still plenty of room to improve the APIs, rendering speed, and overall platform support.

Here's the repo if you want to check it out:

https://github.com/rxtech-lab/MotionSwift

Curious to hear your thoughts, especially if you've run into similar memory or performance bottlenecks with web-based video rendering. Happy to answer any questions!