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POST
/
v1
/
videos
/
generations
veo3.1-fast-extend Interface
curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "veo3.1-fast-extend",
  "base_video_task_id": "task-unified-1234567890-abcdefgh",
  "prompt": "A cat playing piano, continued"
}
'
{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "veo3.1-fast-extend",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 180,
    "video_duration": 8
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_call",
    "credits_reserved": 25.7,
    "user_group": "default"
  }
}

Authorizations

​
Authorization
string
header
required

##All APIs require Bearer Token authentication##

Get API Key:

Visit API Key Management Page to get your API Key

Add to request header when using:

Authorization: Bearer YOUR_API_KEY

Body

application/json
​
model
enum<string>
default:veo3.1-fast-extend
required

Video generation model name

Available options:
veo3.1-fast-extend
Example:

"veo3.1-fast-extend"

​
base_video_task_id
string
required

Original video task ID, must be a video task ID generated or extended by Veo3.1-Fast

Example:

"task-unified-1234567890-abcdefgh"

​
prompt
string
required

Prompt describing what video to generate, limited to 2000 tokens

Maximum string length: 2000
Example:

"A cat playing piano, continued"

Response

Video generation task created successfully

​
created
integer

Task creation timestamp

Example:

1757169743

​
id
string

Task ID

Example:

"task-unified-1757169743-7cvnl5zw"

​
model
string

Actual model name used

Example:

"veo3.1-fast-extend"

​
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

Video task detailed information

​
type
enum<string>

Task output type

Available options:
text,
image,
audio,
video
Example:

"video"

​
usage
object

Usage and billing information