Seedance 2.5 uses the model ID bytedance/seedance-2.5/reference-to-video. Seedance 2.5 Reference to Video generates videos from images, videos, or audio inputs with customizable duration, resolution, aspect ratio, and output format. It supports image-to-video and video-to-video transformations, allowing creative control through prompts and audio integration.
1. Calling the API
Send requests to https://api.higgsfield.ai/bytedance/seedance-2.5/reference-to-video with a JSON body matching the parameters below.
Install
Install an official server-side SDK. cURL needs no package.
npm install @higgsfield/clientSetup
Keep credentials in server-side environment variables. The SDKs accept the same KEY_ID:KEY_SECRET value under their documented variable names.
export HF_CREDENTIALS="YOUR_KEY_ID:YOUR_KEY_SECRET" # TypeScript
export HF_KEY="YOUR_KEY_ID:YOUR_KEY_SECRET" # Python and cURLRequest parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
prompt | string | No | — | Minimum length: 1. |
duration | integer | No | 5 | Minimum: 4. Maximum: 30. |
audio_urls | array[string] | No | — | |
image_urls | array[string] | No | — | |
resolution | string | No | "720p" | Options: 480p, 720p. |
video_urls | array[string] | No | — | |
aspect_ratio | string | No | "16:9" | Options: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9. |
output_format | string | No | "mp4" | Options: mp4, mov. |
generate_audio | boolean | No | true |
2. Authentication
The official SDKs read credentials from the server environment and send the required Authorization: Key KEY_ID:KEY_SECRET header.
API Key
Never expose the secret in browser-side code or commit it to source control. The TypeScript SDK is server-side only. For direct HTTP calls, use:
Authorization: Key $HF_KEY3. Queue
subscribe submits the asynchronous request and waits for a terminal result. The TypeScript SDK polls automatically when withPolling: true; the Python SDK's synchronous subscribe call also waits. A completed request returns the generated file in the video field.
Submit and wait
import { config, higgsfield } from "@higgsfield/client/v2";
config({
credentials: process.env.HF_CREDENTIALS,
});
const result = await higgsfield.subscribe(
"bytedance/seedance-2.5/reference-to-video",
{
input: {
"duration": 5,
"resolution": "720p",
"aspect_ratio": "16:9",
"output_format": "mp4",
"generate_audio": true
},
withPolling: true,
},
);
console.log(result);Explicit lifecycle control
Use the Python SDK when a worker needs explicit status, result, or cancellation control for an existing request. The TypeScript v2 client currently exposes automatic polling through subscribe.
import higgsfield_client
request_id = "{request_id}"
status = higgsfield_client.status(request_id=request_id)
result = higgsfield_client.result(request_id=request_id)
higgsfield_client.cancel(request_id=request_id)