Veo 3.1 (Extend Video) · Video to video

← Veo Model name: veo3.1/extend-video
Generation type: video_to_video
Endpoint: POST /api/asset_generator/

Pricing

28.0 credits per output. Prices are per output. When a request asks for several outputs, the charge is this price times the number of outputs.

Quick start

The example uses sample media from our CDN. Swap in publicly accessible URLs for your own files.

curl --request POST \
  --url https://api.creatify.ai/api/asset_generator/ \
  --header 'Content-Type: application/json' \
  --header 'X-API-ID: your-api-id' \
  --header 'X-API-KEY: your-api-key' \
  --data '{
    "model_name": "veo3.1/extend-video",
    "input_params": {
      "prompt": "She finishes speaking, leans back and smiles at the camera.",
      "video_url": "https://d35ghwdno3nak3.cloudfront.net/tutorial/asset-generator/sample-video.mp4"
    }
  }'

import requests

response = requests.post(
    "https://api.creatify.ai/api/asset_generator/",
    headers={"X-API-ID": "your-api-id", "X-API-KEY": "your-api-key"},
    json={
        "model_name": "veo3.1/extend-video",
        "input_params": {
            "prompt": "She finishes speaking, leans back and smiles at the camera.",
            "video_url": "https://d35ghwdno3nak3.cloudfront.net/tutorial/asset-generator/sample-video.mp4"
        },
    },
)
print(response.json()["id"])

Input parameters

Send these fields in input_params.

string

required

The text prompt describing how the video should be extendedMinimum characters: 1. Maximum characters: 2000.

string

required

URL of the video to extend. The video should be 720p or 1080p resolution in 16:9 or 9:16 aspect ratio.

boolean

default:false

Whether to automatically attempt to fix prompts that fail content policy or other validation checks by rewriting them.

string

default:"7s"

The duration of the generated video.Allowed values: "7s".

string

default:"720p"

The resolution of the generated video.Allowed values: "720p", "1080p".

string

default:"16:9"

The aspect ratio of the generated video.Allowed values: "16:9", "9:16".

boolean

default:true

Whether to generate audio for the video.

string

A negative prompt to guide the video generation

Complete JSON schema

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "prompt",
    "video_url"
  ],
  "properties": {
    "prompt": {
      "type": "string",
      "title": "Prompt",
      "maxLength": 2000,
      "minLength": 1,
      "description": "The text prompt describing how the video should be extended"
    },
    "auto_fix": {
      "type": "boolean",
      "title": "Auto Fix",
      "default": false,
      "description": "Whether to automatically attempt to fix prompts that fail content policy or other validation checks by rewriting them.",
      "x-is-hidden": true
    },
    "duration": {
      "enum": [
        "7s"
      ],
      "type": "string",
      "title": "Duration",
      "default": "7s",
      "description": "The duration of the generated video."
    },
    "video_url": {
      "type": "string",
      "title": "Video URL",
      "examples": [
        "https://v3b.fal.media/files/b/0a8670fe/pY8UGl4_C452wOm9XUBYO_9ae04df8771c4f3f979fa5cabeca6ada.mp4"
      ],
      "description": "URL of the video to extend. The video should be 720p or 1080p resolution in 16:9 or 9:16 aspect ratio.",
      "resolution_limit": [
        "720p",
        "1080p"
      ],
      "aspect_ratio_limit": [
        "16:9",
        "9:16"
      ],
      "min_duration": 3
    },
    "resolution": {
      "enum": [
        "720p",
        "1080p"
      ],
      "type": "string",
      "title": "Resolution",
      "default": "720p",
      "description": "The resolution of the generated video.",
      "x-advance-settings": true
    },
    "aspect_ratio": {
      "enum": [
        "16:9",
        "9:16"
      ],
      "type": "string",
      "title": "Aspect Ratio",
      "default": "16:9",
      "description": "The aspect ratio of the generated video."
    },
    "generate_audio": {
      "type": "boolean",
      "title": "Generate Audio",
      "default": true,
      "description": "Whether to generate audio for the video.",
      "x-advance-settings": true
    },
    "negative_prompt": {
      "type": "string",
      "title": "Negative Prompt",
      "description": "A negative prompt to guide the video generation",
      "x-advance-settings": true
    }
  }
}

Response

The request returns the task with status: "initializing". Poll GET /api/asset_generator/{id}/ until status is done or failed, or pass a webhook_url to be notified. A finished task lists its files in assets and the credits it charged in credits_used.

Get Started

URL to Video

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AI Shorts (Deprecated)

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Product Video (Deprecated)

Veo 3.1 (Extend Video) · Video to video

Pricing

Quick start

Input parameters

Response

​Pricing

​Quick start

​Input parameters

​Response

Pricing

Quick start

Input parameters

Response