Create video using LTX models

June 3, 2025

Table of contents

  1. Request Headers
  2. Request Body
  3. Responses
  4. Model
  5. Examples
  6. Try It

This endpoint creates a video using LTX Studio’s LTX models (LTX-Video) from image inputs.

https://api.useapi.net/v1/ltxstudio/videos/ltx-create

Request Headers 
Authorization: Bearer {API token}
Content-Type: application/json
# Alternatively you can use multipart/form-data
# Content-Type: multipart/form-data
Request Body 
{
  "prompt": "A serene landscape with flowing water",
  "startAssetId": "asset:3b18…-type:image/png",
  "model": "ltxv-turbo",
  "duration": "3",
  "aspectRatio": "16:9",
  "intensity": "medium",
  "seed": 123456,
  "audioSFX": true
}
  • email is optional when only one account configured.
    However, if you have multiple accounts configured, this parameter becomes required.
  • prompt is required, text description for video generation (max 2000 characters)
  • startAssetId is optional, asset ID for the starting frame (use field fileId from POST /assets)
  • endAssetId is optional, asset ID for the ending frame (use field fileId from POST /assets)
  • model is optional, LTX model to use.
    Supported values: ltxv, ltxv-turbo.
    Default is ltxv-turbo.
  • duration is optional, video duration in seconds.
    Supported values: 3, 5, 7, 9.
    Default is 3.
  • aspectRatio is optional, video aspect ratio.
    Supported values: 16:9, 9:16, 1:1.
    Default is 16:9.
  • intensity is optional, motion intensity level.
    Supported values: low, medium, high.
    Default is medium.
  • seed is optional, random seed for reproducible results.
    Default is random.
  • audioSFX is optional, enable automatic sound effects generation.
    Default is false.
  • pollForResult is optional, number of polling attempts to wait for completion (each attempt waits 3 seconds, up to 60 seconds total max) before sending job to the scheduler.
    For example, pollForResult: 5 will poll every 3 seconds for up to 15 seconds total.
    Supported values: 1-20.
    Default is immediate return with jobId.
  • maxJobs is optional, override the default maximum number of concurrent jobs.
  • replyUrl is optional, webhook URL for job completion notifications.
    See GET assets/jobId for response model.
  • replyRef is optional, custom reference for webhook identification.

Note: Either startAssetId or endAssetId (or both) must be provided.

Responses

  • 200 OK (Job Created)

    {
    "jobId": "email:[email protected]:7a34b821-9fd0-205e-d21b-4abc6f7839e7-type:video",
    "generationId": "gen_abc123def456"
}

  • 200 OK (pollForResult completed)

    {
    "status": {
        "type": "completed",
        "progress": 100,
        "artifact": {
            "assetUrl": "https://storage.googleapis.com/lt-infinity-prd/artifacts/model-serving/…",
            "expirationDateString": "1748919477350",
            "asset": {
                "type": "artifact",
                "fileId": "asset:3b18…-type:video/mp4",
                "mimeType": "video/mp4",
                "artifactSubtype": "model-serving"
            }
        }
    },
    "jobId": "email:[email protected]:7a34b821-9fd0-205e-d21b-4abc6f7839e7-type:video",
    "replyRef": "custom-reference-123",
    "replyUrl": "https://webhook.example.com/ltx-callback",
    "code": 200
}

  • 400 Bad Request

    {
  "error": "startAssetId or endAssetId is required",
  "code": 400
}

  • 401 Unauthorized

    {
  "error": "Unauthorized",
  "code": 401
}

  • 402 Payment Required

    {
  "error": "Insufficient credits",
  "code": 402
}
Model

Use GET assets/jobId to retrieve job status and results if they were not provided with the response.

{ // TypeScript, all fields are optional
    status: {
        type: 'active' | 'completed' | 'failed'
        progress?: number
        message?: string
        artifact?: {
            assetUrl: string
            expirationDateString: string
            asset: {
                type: string
                fileId: string
                mimeType: string
                artifactSubtype: string
            }
        }
    }
    jobId?: string
    generationId?: string
    replyRef?: string
    replyUrl?: string
    code?: number
}
Examples 
  • curl "https://api.useapi.net/v1/ltxstudio/videos/ltx-create" \
   -H "Authorization: Bearer …" \
   -H "Content-Type: application/json" \
   -d '{
     "prompt": "A serene landscape with flowing water",
     "startAssetId": "asset:3b18…-type:image/png",
     "model": "ltxv-turbo",
     "duration": "3",
     "aspectRatio": "16:9",
     "intensity": "medium",
     "audioSFX": true,
     "pollForResult": 10
   }'

  • const token = "API token";
const apiUrl = "https://api.useapi.net/v1/ltxstudio/videos/ltx-create";

const response = await fetch(apiUrl, {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${token}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "prompt": "A serene landscape with flowing water",
    "startAssetId": "asset:3b18…-type:image/png",
    "model": "ltxv-turbo",
    "duration": "3",
    "aspectRatio": "16:9",
    "intensity": "medium",
    "audioSFX": true,
    "pollForResult": 10
  })
});
const result = await response.json();
console.log("response", {response, result});

  • import requests
token = "API token"
apiUrl = "https://api.useapi.net/v1/ltxstudio/videos/ltx-create"
headers = {
    "Authorization" : f"Bearer {token}",
    "Content-Type": "application/json"
}
data = {
    "prompt": "A serene landscape with flowing water",
    "startAssetId": "asset:3b18…-type:image/png",
    "model": "ltxv-turbo",
    "duration": "3",
    "aspectRatio": "16:9",
    "intensity": "medium",
    "audioSFX": True,
    "pollForResult": 10
}
response = requests.post(apiUrl, headers=headers, json=data)
print(response, response.json())
Try It