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v4.0.421

remotion-dev/remotionv4.0.421Feb 10, 2026by JonnyBurger

AI Summary

This release focuses on bug fixes for audio mixing, loop display, and Studio UX, alongside the addition of a new Vercel Sandbox template and various documentation improvements.

Key Highlights

  • Fixed floating point error in audio mixing.
  • Fixed bugs in loop display.
  • Added support to open browser when Studio is already running.
  • Added a new Vercel Sandbox Rendering template.

New Features

  • Vercel Sandbox Rendering template support.

Full Release Notes

## What's Changed

* `@remotion/renderer`: Fix floating point error in audio mixing by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/6492
* `@remotion/studio`: Fix bugs in loop display by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/6496
* `@remotion/cli`: Open browser when Studio is already running by @tiwariaayu in https://github.com/remotion-dev/remotion/pull/6480

## Templates
* [**New Vercel Sandbox Rendering template**](https://www.remotion.dev/templates/vercel by @UmungoBungo in https://github.com/remotion-dev/remotion/pull/6444

## Docs
* Fix typo in audio component documentation by @UmungoBungo in https://github.com/remotion-dev/remotion/pull/6489
* Add SSR + OG tags to Prompts pages with static route generation by @samohovets in https://github.com/remotion-dev/remotion/pull/6472
* Docs: Move to vercel.ts, use longer cache TTL to save money by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/6495
* Update code snippet line numbers in sequence.mdx by @a0m0rajab in https://github.com/remotion-dev/remotion/pull/6484
* Lazy-load Mux videos on homepage by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/6494

## Internals
* Update Webpack and AWS dependencies to resolve vulnerabilities by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/6490
* Enhance: update AGENTS.md to run build before commiting by @samohovets in https://github.com/remotion-dev/remotion/pull/6499


## New Contributors
* @a0m0rajab made their first contribution in https://github.com/remotion-dev/remotion/pull/6484

**Full Changelog**: https://github.com/remotion-dev/remotion/compare/v4.0.420...v4.0.421