Google Veo · Video

First/Last Frame Video

📌 What is this：Generate a transition video between a first and last frame.

💡 When to use：Use to precisely control the start and end frames.

Endpoints

Usage	Method	Path
Submit task	POST	/api/cqt/generator/veo
Query Result	GET	/api/cqt/info/veo?id={taskId}

⏱ Recommended polling interval：Poll every 10-15s until status = succeeded / failed.

Request Parameters

Param	Type	Required	Description
model	string	Required	veo-3.1 / veo-3.1-fast
firstFrameUrl	string	Required	First frame image URL
lastFrameUrl	string	Required	Last frame image URL
prompt	string	—	Transition description
duration	integer	—	Duration (sec) 4 / 6 / 8

Request Example

curl -X POST https://api.cqtai.com/api/cqt/generator/veo \
  -H 'Authorization: Bearer <API_KEY>' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "veo-3.1-fast",
    "prompt": "smooth transition between the two frames",
    "firstFrameUrl": "https://example.com/first.jpg",
    "lastFrameUrl": "https://example.com/last.jpg",
    "duration": 6
  }'
# -> { "code":200, "data":"<taskId>" }

Response Example

{
  "code": 200,
  "data": {
    "id": "<taskId>",
    "status": "succeeded",
    "resultUrl": "https://.../result.mp4",
    "createTime": "2026-06-15 10:00:00",
    "completeTime": "2026-06-15 10:02:00"
  }
}

Billing & Credits

Billed per the chosen model (x your user rate). Auto-refunded on failure.