Caption recorder 作成者: Dymka

プライバシー優先のリアルタイム字幕録音・文字起こしエクスポートツール。

この拡張機能について

CaptionRecorder is a featherweight, 100% private add-on that captures live closed captions and speaker turns in Google Meet. Follow transcripts live in your sidebar and export clean notes or subtitles to Markdown, TXT, SRT, or VTT with zero setup.

🔒 100% Private & On-Device: Zero telemetry, no external servers, and no account required. Your meeting conversations stay strictly on your computer.
🪶 Clean & Non-Intrusive: No floating overlays, watermark badges, or screen clutter over your video call. A subtle REC badge in your toolbar confirms active recording.
⚡ Smart Turn Tracking: Captures real-time caption updates and cleanly groups dialogue by speaker without stutter or duplicated phrases.
📑 Sidebar Transcript View: Click the toolbar icon to view live transcripts, speech duration, and word counts alongside your meeting.
💾 Session Recovery: Accidental tab closure or refresh? CaptionRecorder buffers active sessions locally so you can easily restore unsaved transcripts.
📁 Flexible Exports: Export formatted Markdown (.md), Plain Text (.txt), SubRip (.srt), or WebVTT (.vtt), or copy directly to clipboard with one click.
🌐 Multi-Language UI: Natively supports English, Spanish, Portuguese, Italian, German, French, Russian, Japanese, Korean, and Chinese.

Join any call on Google Meet.
Turn on captions by clicking the CC button (or press c on your keyboard).
The toolbar icon will display a red REC badge indicating live recording.
Click the CaptionRecorder icon in the toolbar (or open your Firefox Sidebar) to follow the live transcript, view speaker turns, and export in your preferred format.

storage: Buffers your ongoing meeting transcript in local storage to prevent data loss if a call drops or a tab reloads.
tabs: Synchronizes the sidebar transcript viewer with the active Google Meet tab.
meet.google.com/*: Reads closed caption elements displayed during active meetings.

開発者のコメント

The extension is built with TypeScript and WXT (Next-gen Web Extension Framework powered by Vite/Rollup).

Environment requirements:
- Node.js: 20+ (tested on Node 20, 22, 24)
- npm: 10+

Steps to reproduce the build:
1. Extract caption-recorder-1.1.0-sources.zip
2. Run npm ci to install exact dependencies from package-lock.json
3. Run npm run build:firefox to build the Firefox Manifest V3 extension
4. The output will be located in .output/firefox-mv3/

To package the distribution zip:
- Run npm run zip:firefox
- The packaged zip will be located in .output/caption-recorder-1.1.0-firefox.zip

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Caption recorder 作成者: Dymka

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