Skip to main content
POST
/
v3
/
async
/
veo-3.1-lite-extend
Veo 3.1 Lite Video Extension
curl --request POST \
  --url https://api.highwayapi.ai/v3/async/veo-3.1-lite-extend \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "seed": 123,
  "video": "<string>",
  "prompt": "<string>",
  "resolution": "<string>",
  "aspect_ratio": "<string>",
  "sample_count": 123,
  "enhance_prompt": true,
  "generate_audio": true,
  "negative_prompt": "<string>",
  "person_generation": "<string>"
}
'
{
  "task_id": "<string>"
}
Video extension API based on the Google Veo 3.1 Lite model, supporting content extension generation for input videos.
This is an asynchronous API and only returns the asynchronous task’s task_id. You should use this task_id to request the Get Task Result API to retrieve the generated result.

​
Request Headers

​
Content-Type
string
required
Enum value: application/json
​
Authorization
string
required
Bearer authentication format: Bearer {{API Key}}.

​
Request Body

​
seed
integer
Random seed for generating reproducible resultsValue range: [0, 4294967295]
​
video
string
required
URL address of the input video, supporting formats such as mp4/mov/mpeg/avi
​
prompt
string
required
Text prompt describing the content of the extended video (English only)
​
resolution
string
default:"720p"
Output video resolutionOptional values: 720p, 1080p
​
aspect_ratio
string
default:"16:9"
Output video aspect ratioOptional values: 16:9, 9:16
​
sample_count
integer
default:1
Number of videos to generateValue range: [1, 4]
​
enhance_prompt
boolean
default:true
Whether to automatically optimize the prompt
​
generate_audio
boolean
default:false
Whether to generate an audio track
​
negative_prompt
string
Negative prompt, describing content to avoid
​
person_generation
string
default:"allow_adult"
Safety control for person generationOptional values: dont_allow, allow_adult

​
Response Information

​
task_id
string
Use the task_id to request the Get Task Result API to retrieve the generated output.