Veo 3.1 Lite Serverless API

Affordable text-to-video with audio, powered by Google.

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~49.52s
POST /v2/veo-3.1-lite · submit + poll
 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3from segmind import SegmindClient, InferenceFailed, InferenceTimeout
 4
 5# Async (v2) — recommended for long-running / video models.
 6# run() blocks up to 600s; submit_async + job.wait(timeout=...) sets a longer
 7# deadline and keeps the request_id so you can re-poll later.
 8client = SegmindClient()                      # reads SEGMIND_API_KEY
 9payload = {
10    "image": "https://segmind-resources.s3.amazonaws.com/input/veo-3.1-lite-input.jpg",
11    "prompt": "The camera slowly pans across a breathtaking aerial view of a misty mountain valley at golden hour, snow-capped peaks glistening, birds flying gracefully through wisps of morning fog",
12    "duration": 8,
13    "resolution": "720p",
14    "aspect_ratio": "16:9",
15    "generate_audio": True,
16}
17job = client.submit_async("veo-3.1-lite", **payload)
18print(job.request_id)                         # available immediately
19try:
20    result = job.wait(timeout=900, interval=2.0)
21    print(result["status"])                  # COMPLETED
22    print(result.get("output"))              # model output (e.g. video URL)
23except InferenceTimeout as e:
24    print("still running:", e.request_id)    # re-poll later with this id
25except InferenceFailed as e:
26    print("failed:", e.detail)
27
28# Fast models (<=600s) can use the one-liner instead:
29# result = segmind.run("veo-3.1-lite", **payload)

API Endpoint

POSThttps://api.segmind.com/v1/veo-3.1-lite

Parameters

promptrequired
string

Describe scene, subject, action, camera movement, and style.

Default: "The camera slowly pans across a breathtaking aerial view of a misty mountain valley at golden hour, snow-capped peaks glistening, birds flying gracefully through wisps of morning fog"
aspect_ratiooptional
string

Video orientation. 16:9 for YouTube, 9:16 for Reels.

Default: "16:9"
Allowed values :
"16:9""9:16"
durationoptional
integer

Video length in seconds. 4s for ads, 8s for cinematic.

Default: 8
Allowed values :
468
generate_audiooptional
boolean

Enable synchronized audio generation alongside the video.

Default: true
imageoptional
string (uri)

Starting image URL anchoring the video's first frame.

Default: "https://segmind-resources.s3.amazonaws.com/input/veo-3.1-lite-input.jpg"
last_frameoptional
string (uri)

Ending image URL to control the video's final frame.

Default: null
reference_imagesoptional
string (uri)

Reference image URLs for visual consistency across generations.

resolutionoptional
string

Output resolution. 720p faster; 1080p for high-detail content.

Default: "720p"
Allowed values :
"720p""1080p"

Response Type

Returns: Video

Asynchronous requests (v2)

Use Async for video, long-running (>~60s), or high-concurrency workloads; Sync is simplest for fast image & LLM calls. Async submits a request and you poll it to completion.

  1. 1
    POST /v2/veo-3.1-lite

    Submit — returns request_id, status_url, response_url

  2. 2
    GET /v2/requests/{id}/status

    Poll — until COMPLETED or FAILED

  3. 3
    GET /v2/requests/{id}

    Result — final response body

Status states

QUEUED— Accepted, waiting for a worker
PROCESSING— Running on a worker
COMPLETED— Done — result body is ready
FAILED— Errored (incl. content/RAI blocks)
  • A FAILED request is served as HTTP 422 — the body still carries the error detail.
  • An unknown or expired request_id returns HTTP 404.
  • Results are retained for 1 hour, then expire.
  • Content / RAI blocks surface as FAILED, not a separate state.
  • Track completion by polling the status endpoint.

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