record audio node support

[jtydhr88]

Bounty task - audio input node, requested in https://www.notion.so/drip-art/Audio-input-node-1706d73d365080eeb8e5e39790584dff?source=copy_link
Need BE change here Comfy-Org/ComfyUI#8716

Please notice I introdcued two new dependencies to support record audio:

1. extendable-media-recorder https://www.npmjs.com/package/extendable-media-recorder
2. extendable-media-recorder-wav-encoder https://www.npmjs.com/package/extendable-media-recorder-wav-encoder

the reason of why I need this two is, as practised, the native browser MediaRecorder API has significant limitations for our use case:

1. Format Incompatibility: Chrome produces WebM format, Firefox produces OGG format, even when requesting audio/wav
2. Backend Processing Issues: The generated files cannot be properly read by torchaudio.load() in our Python backend
3. Cross-browser Inconsistency: Different browsers generate different audio formats, causing compatibility issues

so we need to use this extendable-media-recorder could allow us record WAV directly.

┆Issue is synchronized with this Notion page by Unito

[christian-byrne]

Could you add a unit test and demo recording if possible?

[jtydhr88]

demo is
https://github.com/user-attachments/assets/62cf2cdd-5ab0-4873-a998-6b0a52a4b5d0

[christian-byrne]

Great work on overall!

Left some comments that need to be addressed before merging, primarily around resource management and cleanup.

[christian-byrne]

For anyone else: To test this feature, you need to do this in ComfyUI folder:

git remote add jtydhr88 https://github.com/jtydhr88/ComfyUI.git
git fetch jtydhr88
git checkout -b record-audio-node jtydhr88/record-audio-node

[christian-byrne]

Nice, this looks ready to merge. The only two minor things I would say are:

1. Is it possible to replace timeout with hard-coded 500ms with somthing that resolves on mediaRecorder.onStop (or similar)?
2. Could we remove the console.logs?

[jtydhr88]

@christian-byrne fixed your feedback, please double check

[jtydhr88]

there is one failed test about locale, likely not caused by this change

[github-actions]

⚠️ Warnings

⚠️ Warning: E2E Test Coverage Missing

If this PR modifies behavior that can be covered by browser-based E2E tests, those tests are required. PRs lacking applicable test coverage may not be reviewed until added. Please add or update browser tests to ensure code quality and prevent regressions.

⚠️ Warning: Visual Documentation Missing

If this PR changes user-facing behavior, visual proof (screen recording or screenshot) is required. PRs without applicable visual documentation may not be reviewed until provided.
You can add it by:

• GitHub: Drag & drop media directly into the PR description

• YouTube: Include a link to a short demo

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	extendable-media-recorder-wav-encoder@​7.0.129
	extendable-media-recorder@​9.2.27

View full report