Starstruk Logo MarkStarstruk

v4.5.0

Upsonic/Upsonicv4.5.0Jun 9, 2026by alyssaxuu

AI Summary

A major performance update that moves the editor to WebCodecs and enables background recording using the Offscreen API to prevent tab freezing.

Key Highlights

  • Recordings now run in the background using the offscreen API instead of a pinned tab.
  • The editor is lighter and faster running entirely on WebCodecs.
  • The ffmpeg fallback has been removed.

New Features

  • Background recording capability.
  • WebCodecs-based 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.