Veo 3.1 Extend Video Generation

curl --request POST \
  --url https://api.aihubmax.com/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "veo-3.1-extend",
  "prompt": "The camera continues to pan across the landscape",
  "video_url": "https://example.com/input-video.mp4",
  "aspect_ratio": "16:9",
  "generate_audio": true
}
'

{
  "created": 1757165031,
  "id": "task-unified-1757165031-uyujaw3d",
  "model": "<string>",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 45
  },
  "type": "video"
}

{
  "error": {
    "message": "Invalid request format",
    "type": "invalid_request_error"
  }
}

{
  "error": {
    "message": "Invalid API key",
    "type": "authentication_error"
  }
}

{
  "error": {
    "message": "Insufficient account balance",
    "type": "insufficient_quota"
  }
}

{
  "error": {
    "message": "Parameter validation failed",
    "type": "validation_error"
  }
}

{
  "error": {
    "message": "Rate limit exceeded",
    "type": "rate_limit_error"
  }
}

{
  "error": {
    "message": "Internal server error",
    "type": "server_error"
  }
}

{
  "error": {
    "message": "Service temporarily unavailable, please try again later",
    "type": "service_unavailable"
  }
}

POST

videos

generations

curl --request POST \
  --url https://api.aihubmax.com/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "veo-3.1-extend",
  "prompt": "The camera continues to pan across the landscape",
  "video_url": "https://example.com/input-video.mp4",
  "aspect_ratio": "16:9",
  "generate_audio": true
}
'

{
  "created": 1757165031,
  "id": "task-unified-1757165031-uyujaw3d",
  "model": "<string>",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 45
  },
  "type": "video"
}

{
  "error": {
    "message": "Invalid request format",
    "type": "invalid_request_error"
  }
}

{
  "error": {
    "message": "Invalid API key",
    "type": "authentication_error"
  }
}

{
  "error": {
    "message": "Insufficient account balance",
    "type": "insufficient_quota"
  }
}

{
  "error": {
    "message": "Parameter validation failed",
    "type": "validation_error"
  }
}

{
  "error": {
    "message": "Rate limit exceeded",
    "type": "rate_limit_error"
  }
}

{
  "error": {
    "message": "Internal server error",
    "type": "server_error"
  }
}

{
  "error": {
    "message": "Service temporarily unavailable, please try again later",
    "type": "service_unavailable"
  }
}

Authorizations

Authorization

string

header

required

All APIs require Bearer Token authentication

Add to request header:

Authorization: Bearer YOUR_API_KEY

Body

application/json

model

string

default:veo-3.1-extend

required

veo-3.1-extend: Standard version veo-3.1-extend-fast: Fast version

Examples:

"veo-3.1-extend"

"veo-3.1-extend-fast"

prompt

string

required

Text prompt describing the direction of the video extension content

Notes:

Supports both Chinese and English
Describe continuing actions, scene changes, etc.

Example:

"The camera continues to pan across the landscape"

video_url

string

required

Publicly accessible URL of the input video

Notes:

Must be a publicly accessible URL
Input video should be 720p or 1080p
Input video aspect ratio should be 16:9 or 9:16
The system will continue generating 7 seconds of content from the end of this video

Example:

"https://example.com/input-video.mp4"

aspect_ratio

string

default:16:9

Output video aspect ratio

Options:

16:9 — Landscape (default)
9:16 — Portrait

Example:

"16:9"

generate_audio

boolean

default:true

Whether to generate accompanying audio

Notes:

Enabled by default

Example:

true

auto_fix

boolean | null

Auto-fix prompt (default true)

Do not pass this parameter unless necessary.

Example:

true

safety_tolerance

integer | null

Content safety level, 1 is the strictest

Do not pass this parameter unless necessary.

Required range: 1 <= x <= 6

Example:

3

negative_prompt

string | null

Negative prompt, describing elements you do not want to appear

Notes:

Separate multiple keywords with commas

Do not pass this parameter unless necessary.

Example:

"blurry, low quality, watermark"

seed

integer | null

Random seed

Notes:

Set a fixed value to reproduce generation results
Omit for random

Do not pass this parameter unless necessary.

Example:

42

Response

Task created successfully

created

integer

Task creation timestamp

Example:

1757165031

string

Task ID

Example:

"task-unified-1757165031-uyujaw3d"

model

string

Actual model name used

object

enum<string>

Specific task type

Available options:

video.generation.task

progress

integer

Task progress percentage (0-100)

Required range: 0 <= x <= 100

Example:

0

status

enum<string>

Task status

Available options:

pending,

processing,

completed,

failed

Example:

"pending"

task_info

object

Async task information

Show child attributes

type

enum<string>

Task output type

Available options:

video

Example:

"video"

Image Series

Video Series

Audio Series

Text Series

Document Processing

Task Management

File Management

Veo 3.1 Extend Video Generation

Authorizations

All APIs require Bearer Token authentication

Body

Response