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Nutlope/ai-subtitles

A Next.js web app that generates timed subtitles from uploaded videos or media links using Together AI's Whisper model.

Open-source alternative to:RevDescript

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Last commit
7 months ago

What is it?

SubStudio is a web app for creating subtitles from video. You upload a video file or paste a direct media link, and the app extracts the audio and sends it to Together AI's Whisper Large v3 model to transcribe it with word-level timestamps. Short intervals are merged into readable subtitle blocks.

Before export, you can preview and style the captions in real time using six preset looks: Classic, TikTok, Modern Box, Cinematic, Outline and Bold Center. Subtitles can be downloaded as SRT or VTT files, or burned into an MP4.

The project is built with Next.js (App Router), Tailwind CSS, Framer Motion, and FFmpeg via fluent-ffmpeg. It can be run locally with a Together AI API key in a .env file or entered in the UI, and deployed to Vercel with one click.

Key features

  • 01Transcribes video audio with word-level timestamps via Together AI Whisper Large v3.
  • 02Accepts uploaded video files or direct media links.
  • 03Offers six preset caption styles with real-time preview.
  • 04Exports subtitles as SRT, VTT, or burned-in MP4.

Use cases

  • Adding captions to short-form videos for TikTok or Reels.
  • Generating SRT or VTT subtitle files for video editing workflows.
  • Creating burned-in subtitles for social media posts.

Quick start

  1. 1

    Clone the repository

    git clone https://github.com/Luffixos/ai-subtitles.git
  2. 2

    Create a .env file with your Together AI key (TOGETHER_API_KEY=your_api_key_here)

  3. 3

    Install dependencies

    npm install
  4. 4

    Start the dev server at http://localhost:3000

    npm run dev

Things to know

  • Transcription requires a Together AI API key.
  • The listing metadata has no license, while the README says MIT; confirm the license before reuse.

Topics

#subtitles#speech-to-text#whisper#nextjs#video#transcription

FAQ

What is ai-subtitles?
A Next.js web app that generates timed subtitles from uploaded videos or media links using Together AI's Whisper model. SubStudio is a web app for creating subtitles from video. You upload a video file or paste a direct media link, and the app extracts the audio and sends it to Together AI's Whisper Large v3 model to transcribe it with word-level timestamps. Short intervals are merged into readable subtitle blocks.
Is ai-subtitles free to use? What license does it have?
ai-subtitles has no declared license. Its code is public, but without a license you have no explicit permission to reuse it; ask the author before relying on it.
Is ai-subtitles still maintained?
No commits for 6+ months. The last commit to ai-subtitles was on Apr 7, 2026.
What can I use ai-subtitles for?
Adding captions to short-form videos for TikTok or Reels. Generating SRT or VTT subtitle files for video editing workflows. Creating burned-in subtitles for social media posts.
How do I install ai-subtitles?
Clone the repository: git clone https://github.com/Luffixos/ai-subtitles.git Create a .env file with your Together AI key (TOGETHER_API_KEY=your_api_key_here) Install dependencies: npm install Start the dev server at http://localhost:3000: npm run dev
Where can I get ai-subtitles?
The source code and installation instructions are on GitHub: https://github.com/Nutlope/ai-subtitles

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