Seedance 2 · Video

First/Last Frame VideoNEW

📌 What is this：Given a first frame (optionally a last frame too), generate a video that starts from the first frame and transitions toward the last.

💡 When to use：Use to precisely control the opening frame; add a last frame to also control the ending and produce a transition. First/last frames are independent from image-to-video reference images.

Endpoints

Usage	Method	Path
Submit task	POST	/api/cqt/generator/seedance2
Query Result	GET	/api/cqt/info/seedance2?id={taskId}

⏱ Recommended polling interval：Video generation is slow (~1-4 min); poll every 15s until status = succeeded / failed.

Request Parameters

Param	Type	Required	Description
model	string	—	Fixed seedance2
firstFrameUrl	string	Required	First-frame image URL (required)
lastFrameUrl	string	—	Last-frame image URL (optional; produces a first-to-last transition)
prompt	string	—	Transition / camera description (optional)
seconds	integer	—	Duration (sec) 4-15, default 5 (alias duration)
resolution	string	—	Resolution 480p / 720p, default 720p
generateAudio	boolean	—	Whether to generate audio, default false

Request Example

curl -X POST https://api.cqtai.com/api/cqt/generator/seedance2 \
  -H 'Authorization: Bearer <API_KEY>' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "seedance2",
    "prompt": "smooth transition between the two frames",
    "firstFrameUrl": "https://example.com/first.jpg",
    "lastFrameUrl": "https://example.com/last.jpg",
    "seconds": 5,
    "resolution": "720p"
  }'
# -> { "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"
  }
}

Response Fields

Field	Type	Description
code	number	Status code; 200 means success
msg	string	Status message; "success" on success
data.id	string	Task ID (taskId); use it to poll GET /api/cqt/info
data.status	string	Task status: succeeded / failed / otherwise still processing
data.resultUrl	string	URL of the generated video; returned when status = succeeded, null otherwise
data.errorMsg	string \| null	Failure reason; null on success
data.createTime	string	Task creation time
data.completeTime	string \| null	Task completion time; null until finished

Billing & Credits

5 credits x duration (sec) (x your user rate). Auto-refunded on failure.