LTX-2-19B I2V Serverless API

LTX-2 generates synchronized 4K audio-video content efficiently and realistically in a single pass.

~113.31s
~$0.455
 1import requests
 2import json
 3
 4url = "https://api.segmind.com/v1/ltx-2-19b-i2v"
 5headers = {
 6    "x-api-key": "YOUR_API_KEY",
 7    "Content-Type": "application/json"
 8}
 9
10data = {
11    "prompt": "A bright sunny afternoon in a backyard with an old stone wall and green bushes in the background, full‑body shot of a young woman in a blue denim jacket, graphic T‑shirt, dark skinny jeans and black sneakers, standing on the grass and starting to walk toward the camera with energetic steps, cheerful and excited, soft daylight and gentle shadows, she smiles and raises one hand as she excitedly shouts in clear English: 'L T X 2 video model is superfast, check it out its live on segmind'",
12    "negative_prompt": "blurry, low quality, still frame, frames, watermark, overlay, titles, has blurbox, has subtitles",
13    "image": "https://segmind-resources.s3.amazonaws.com/output/9f26da93-4913-49ea-8d46-65fe36844f02-Screenshot_2025-11-24_120343.png",
14    "width": 720,
15    "height": 1280,
16    "num_frames": 181,
17    "fps": 24,
18    "seed": 42,
19    "guidance_scale": 4
20}
21
22response = requests.post(url, headers=headers, json=data)
23
24if response.status_code == 200:
25    result = response.json()
26    print(json.dumps(result, indent=2))
27else:
28    print(f"Error: {response.status_code}")
29    print(response.text)

API Endpoint

POSThttps://api.segmind.com/v1/ltx-2-19b-i2v

Parameters

imagerequired
string (uri)

Input image URL

promptrequired
string

Prompt describing the video scene

fpsoptional
integer

Frames per second

Default: 24Range: 1 - 30
guidance_scaleoptional
number

Guidance scale for prompt adherence

Default: 4Range: 1 - 20
heightoptional
integer

Height of the output video

Default: 1280Range: 256 - 1280
negative_promptoptional
string

Negative prompt to avoid certain elements

Default: "blurry, low quality, still frame, frames, watermark, overlay, titles, has blurbox, has subtitles"
num_framesoptional
integer

Number of frames to generate

Default: 181Range: 1 - 400
seedoptional
integer

Random seed for reproducibility

Default: 42
widthoptional
integer

Width of the output video

Default: 720Range: 256 - 1280

Response Type

Returns: Video

Common Error Codes

The API returns standard HTTP status codes. Detailed error messages are provided in the response body.

400

Bad Request

Invalid parameters or request format

401

Unauthorized

Missing or invalid API key

403

Forbidden

Insufficient permissions

404

Not Found

Model or endpoint not found

406

Insufficient Credits

Not enough credits to process request

429

Rate Limited

Too many requests

500

Server Error

Internal server error

502

Bad Gateway

Service temporarily unavailable

504

Timeout

Request timed out