@remotion/media: Upgrade Mediabunny to 1.34.4, register AC3 decoder

[JonnyBurger]

Summary

• Upgrade Mediabunny from 1.34.3 to 1.34.4 across all packages and templates
• Move AC3 decoder registration from @remotion/web-renderer to @remotion/media
• Remove @mediabunny/ac3 dependency from @remotion/web-renderer

Test plan

• Verify AC3 audio decoding works correctly in @remotion/media
• Verify web renderer still works without bundled AC3 dependency
• Run existing tests

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Project	Deployment	Actions	Updated (UTC)
bugs	Ready	Preview, Comment	Feb 17, 2026 1:23pm
remotion	Ready	Preview, Comment	Feb 17, 2026 1:23pm

[Copilot]

Pull request overview

This PR updates the monorepo to Mediabunny 1.34.4 and relocates AC3 decoder registration into @remotion/media, removing the explicit @mediabunny/ac3 dependency from @remotion/web-renderer.

Changes:

• Bump Mediabunny versions to 1.34.4 across root catalog, templates, CLI metadata, and docs.
• Move AC3 decoder registration into packages/media/src/index.ts and ensure @mediabunny/ac3 is treated as external in the media bundle.
• Remove @mediabunny/ac3 from @remotion/web-renderer dependencies and bundler externals.

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/web-renderer/package.json	Drops @mediabunny/ac3 dependency from web-renderer.
packages/web-renderer/bundle.ts	Removes @mediabunny/ac3 from the external list.
packages/template-three/package.json	Updates template Mediabunny version to 1.34.4.
packages/template-recorder/package.json	Updates template Mediabunny version to 1.34.4.
packages/template-music-visualization/package.json	Updates template Mediabunny version to 1.34.4.
packages/studio-shared/src/package-info.ts	Updates reported Mediabunny version to 1.34.4.
packages/media/src/index.ts	Registers AC3 decoder at module import time.
packages/media/bundle.ts	Marks @mediabunny/ac3 as external for bundling.
packages/docs/docs/mediabunny/version.mdx	Updates docs to reference Mediabunny 1.34.4.
packages/cli/src/extra-packages.ts	Updates CLI “extra packages” Mediabunny version to 1.34.4.
package.json	Updates catalog versions for mediabunny, @mediabunny/mp3-encoder, @mediabunny/ac3 to 1.34.4.
bun.lock	Locks updated versions and removes web-renderer’s @mediabunny/ac3 dependency entry.