LTX 2.3 Extend

LTX · Video · Video → Video

Seamlessly extend an existing video forward or backward — up to 20s.

Model ID: ltx-v2.3-extendWorkflow: ltx-2.3/extend-video

Video InputUp to 20s

Install the SDK

The SDK targets Node 20+ and ships with TypeScript types.

npm

npm install @picsart/ai-sdk

Authenticate

Create a client once with your API key — it's sent as a bearer token on every request.

TypeScript

import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY, // sent as: Authorization: Bearer <key>
  apiUrl: 'https://api.picsart.com',
});

Run the model

Call the model with its parameters. This example uses the required ones.

TypeScript

import { createClient } from '@picsart/ai-sdk';

const ai = createClient({
  apiKey: process.env.PICSART_API_KEY,
  apiUrl: 'https://api.picsart.com',
});

const result = await ai.generate('ltx-v2.3-extend', {
  prompt: "A serene mountain lake at golden hour, ultra detailed",
  videoUrl: "https://cdn.example.com/input.mp4"
});

console.log(result.url); // video URL

Parameters

3 parameters. Required ones must be supplied; the rest fall back to their defaults.

Parameter	Type	Required	Default	Details
`prompt` Prompt	`text`	no	`—`	—
`duration`	`enum`	no	`5`	5, 10, 15, 20
`videoUrl` Source Video	`file (video)`	yes	`—`	—

Output

generate() resolves once the job completes. A video URL.

Result

{
  "url": "https://cdn.picsart.com/…/result",
  "results": [
    { "url": "https://cdn.picsart.com/…/result" }
  ],
  "model": "ltx-v2.3-extend"
}