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v4.5.0

antgroup/echomimicv4.5.0Jun 9, 2026by alyssaxuu

AI Summary

A major update that migrates recording processing to the background using the Offscreen API and optimizes the editor by removing the ffmpeg fallback in favor of WebCodecs.

Key Highlights

  • Recordings now run in the background using the Offscreen API
  • Editor runs entirely on WebCodecs with the ffmpeg fallback removed
  • Improved performance and stability with the new recording engine

New Features

  • Background recording capability
  • WebCodecs editor implementation

Full Release Notes

- Recordings now run in the background using the offscreen API instead of a pinned tab, so they keep going even if the tab you started from gets frozen or discarded.
- The editor is lighter and faster now that it runs entirely on WebCodecs, with the ffmpeg fallback removed.