# WebVTT Caption Translator

**Use case:** 

Translate a WebVTT caption file and keep every cue, timestamp and inline tag intact. Convert to .srt on the way out if your player needs it.

## Input

```json
{
  "mode": "subtitles",
  "engine": "ai",
  "targetLanguages": [
    "EN-US"
  ],
  "sourceLanguage": "PT",
  "texts": [],
  "subtitleUrls": [
    "https://raw.githubusercontent.com/brenopolanski/html5-video-webvtt-example/95d018a51935a9a4a189c603295ea98357d9ccf3/MIB2-subtitles-pt-BR.vtt"
  ],
  "subtitleFiles": [],
  "outputFormat": "same",
  "lineWrap": "preserve",
  "maxCharsPerLine": 42,
  "documentUrls": [],
  "documentFiles": [],
  "formality": "default",
  "preserveTags": true
}
```

## Output

```json
{
  "mode": {
    "label": "Mode",
    "format": "text"
  },
  "engine": {
    "label": "Engine",
    "format": "text"
  },
  "index": {
    "label": "#",
    "format": "number"
  },
  "inputUrl": {
    "label": "Source",
    "format": "link"
  },
  "fileName": {
    "label": "File",
    "format": "text"
  },
  "subtitleFormat": {
    "label": "Format",
    "format": "text"
  },
  "fileType": {
    "label": "Doc Type",
    "format": "text"
  },
  "sourceLanguage": {
    "label": "From",
    "format": "text"
  },
  "targetLanguage": {
    "label": "To",
    "format": "text"
  },
  "sourceText": {
    "label": "Source Text",
    "format": "text"
  },
  "translatedText": {
    "label": "Translation",
    "format": "text"
  },
  "cueCount": {
    "label": "Cues",
    "format": "number"
  },
  "translatedCueCount": {
    "label": "Translated",
    "format": "number"
  },
  "partialCues": {
    "label": "Partial",
    "format": "number"
  },
  "overlappingCues": {
    "label": "Overlaps",
    "format": "number"
  },
  "sourceCharacters": {
    "label": "Src Chars",
    "format": "number"
  },
  "billedCharacters": {
    "label": "Billed Chars",
    "format": "number"
  },
  "billedEvents": {
    "label": "Events",
    "format": "number"
  },
  "minimumApplied": {
    "label": "Min Applied",
    "format": "boolean"
  },
  "overageEvents": {
    "label": "Overage",
    "format": "number"
  },
  "byteSize": {
    "label": "Bytes",
    "format": "number"
  },
  "timingsPreserved": {
    "label": "Timings OK",
    "format": "boolean"
  },
  "tagsPreserved": {
    "label": "Tags OK",
    "format": "boolean"
  },
  "subtitleUrl": {
    "label": "Subtitle",
    "format": "link"
  },
  "subtitleText": {
    "label": "Contents",
    "format": "text"
  },
  "outputFileName": {
    "label": "Output Name",
    "format": "text"
  },
  "documentUrl": {
    "label": "Document",
    "format": "link"
  },
  "status": {
    "label": "Status",
    "format": "text"
  },
  "error": {
    "label": "Error",
    "format": "text"
  },
  "processedAt": {
    "label": "Processed",
    "format": "text"
  }
}
```

## About this Actor

This example demonstrates how to use [AI Subtitle & Document Translator — SRT, VTT, DOCX](https://apify.com/sian.agency/ai-subtitle-and-document-translator.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/sian.agency/ai-subtitle-and-document-translator.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
This Task's input is already configured above — use it as-is rather than inventing a new one.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/sian.agency/ai-subtitle-and-document-translator.md

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).