generate.subtitles

Operation: generate.subtitles
Category: media
Tags: subtitles, text, video

Generate TikTok-style ASS subtitles from narration text

Runtime

Type: Native (built-in)
Timeout: 300s
Retries: 3 (ExponentialWithJitter)

Inputs

Name	Type	Required	Default	Description
narration_text	String	Yes	—	Full narration text
audio_duration_secs	Number	No	25.0	Audio duration in seconds
words	JSON	No	—	Array of {start, end, word} word-level timestamps from audio.transcribe

Outputs

Name	Type	Description
url	Asset	ASS subtitle file URL
path	String	Local file path
word_count	Number	Number of words

Default Configuration

{
  "font_name": "Arial Black",
  "font_size": 90,
  "max_words": 2,
  "resolution_x": 1080,
  "resolution_y": 1920
}

Usage

TypeScript

import { WorkflowBuilder } from "@fabric-platform/sdk";

const workflow = new WorkflowBuilder("my-workflow")
  .node("generate-subtitles", "tool", (n) =>
    n.config({
      operation: "generate.subtitles",
      // ... node-specific config
    })
  )
  .build();

Python

from fabric_platform import FabricClient

fabric = FabricClient(api_key="fab_xxx")

wf_id = fabric.upsert_workflow("my-workflow", nodes=[
    {
        "key": "generate-subtitles",
        "kind": "tool",
    },
])

Rust

use fabric_sdk::FabricClient;

let client = FabricClient::new("http://localhost:3001", api_key)?;

let wf_id = client.upsert_workflow("my-workflow", serde_json::json!({
    "nodes": [{
        "key": "generate-subtitles",
        "kind": "tool"
    }]
})).await?;

curl

curl -X POST http://localhost:3001/v1/workflow-definitions \
  -H "Authorization: Bearer $FABRIC_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "my-workflow",
    "nodes": [{
      "key": "generate-subtitles",
      "kind": "tool"
    }]
  }'