Show HN: CapSlap – Local caption generation using Whisper

Built this for a friend who needed to add captions to videos without uploading to third-party services. uses whisper models locally or Openai's api as a fallback.

Features:

- Runs entirely on your machine (privacy-first) - Supports local whisper models - Openai api integration optional - Free and open source

Technical notes:

- Macos only (haven't tested on windows) - Built with Rust, ffmpeg 8, Electron - You'll need to either run from source or allow the app in system settings (no apple developer cert, so gatekeeper will complain). Pretty straightforward if you're comfortable with terminal or adjusting security settings

Figured the HN community might find it useful or have suggestions for improvement.

Github: https://github.com/riseandignite/capslap

Happy to answer questions or take feedback.