# Retime and convert literal captions

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Convert a strict plain SRT/WebVTT caption file with caller-supplied rational time scaling and offset, returning canonical caption text and an exact cue timing map.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Supplied literal caption text with explicit hour timestamps and a known affine millisecond transform

## Outside this profile
- Transcription, translation, speaker identification, media access, inferred sync anchors or guaranteed audiovisual alignment
- Rich captions, markup, entities, whitespace-only cue lines, cue settings, STYLE, REGION, NOTE or arbitrary WebVTT identifiers
- Fetching, uploading, sending, writing files, accessing media or changing external state

Proposed nominal USD 0.005 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/captions-retime-convert.json)
- [Input schema](/reference/schemas/captions-retime-convert.input.json)
- [Output schema](/reference/schemas/captions-retime-convert.output.json)
- [Fixed example](/reference/examples/captions-retime-convert.json)
- [Complete HTML reference](/discover/tools/captions-retime-convert)