Transcript Extractor

Create a portable transcript.json with text, language, and timestamped segments and words. Do not emit only plain text.

Source selection

1. Prefer a local video/audio file when supplied.
2. For a public URL, download audio with yt-dlp.
3. If download fails because authentication is required, ask the user to upload the video or provide an accessible local file. Do not bypass access controls.

Transcribe

Use FFmpeg to create a 16 kHz mono WAV when the input is video. Use Whisper with a model appropriate to the audio quality. Preserve original-language speech unless the user asks for translation.

Return timestamped JSON in this shape: