API reference · ByteDance

bytedance/seedance/2.5/image-to-video

Integrate this model through SandBase's unified API, with production-ready schemas and examples.

VIDEOAsyncOpen model

Production endpoint

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OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDbytedance/seedance/2.5/image-to-video

Input Schema

9 parameters · 0 required · 9 optional

Parameter	Type	Required	Description
`seed`	integer	Optional	Random seed for reproducible results. Omit or use -1 for a random seed. · Min: -1 · Max: 4294967295
`draft`	boolean	Optional	Draft mode step 1: render a fast, low-cost 480p draft (overrides `resolution`, billed at the 480p rate). Pass the result's `outputs[0].draft_id` back as `draft_id` within 7 days to render the same shot at 1080p. · Default: false
`image`	string	Optional	The URL of the starting image for video generation.
`prompt`	string	Optional	The text prompt to generate a video from. · Min length: 3 · Max length: 50000 · Default: "Create a 360-degree orbiting camera shot based on this photo."
`draft_id`	string	Optional	Draft mode step 2: the `outputs[0].draft_id` of a succeeded draft from this same model (created with `draft: true` in the last 7 days). Renders the same shot at 1080p, billed at the 1080p rate for the actual output length. The prompt, media, duration, aspect ratio, seed, audio setting and task type are reused from the draft; any such fields sent with `draft_id` are ignored. · Min length: 1
`duration`	any	Optional	Output duration in seconds (4-30), or `auto` to let the model pick a length from the prompt and inputs. `auto` is pre-authorized at 30 seconds and billed on the actual output length. · Options: auto, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 · Default: 5 auto456789101112131415161718192021222324252627282930
`end_image`	string	Optional	The URL of the ending image for video generation.
`resolution`	string	Optional	The resolution of the video to generate. · Options: 480p, 720p, 1080p · Default: "720p" 480p720p1080p
`generate_audio`	boolean	Optional	Whether to generate synchronized audio (voice, SFX, BGM) for the video. · Default: true

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

const apiKey = process.env.SANDBASE_API_KEY;
const response = await fetch("https://api.sandbase.ai/v1/run", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${apiKey}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "bytedance/seedance/2.5/image-to-video",
    "draft": false,
    "image": "https://p9-arcosite.byteimg.com/tos-cn-i-goo7wpa0wc/f8fc1008f23a4908b7c897e8b7eb87df~tplv-goo7wpa0wc-image.image",
    "prompt": "Create a 360-degree orbiting camera shot based on this photo.",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true
  }),
});

if (!response.ok) throw new Error(await response.text());
let result = await response.json();
for (let attempt = 0; attempt < 120 && !["completed", "failed", "timeout"].includes(result.status); attempt++) {
  await new Promise((resolve) => setTimeout(resolve, 2_000));
  const poll = await fetch(`https://api.sandbase.ai/v1/run/${result.id}`, {
    headers: { Authorization: `Bearer ${apiKey}` },
  });
  if (!poll.ok) throw new Error(await poll.text());
  result = await poll.json();
}
if (result.status !== "completed") throw new Error(`Generation ended: ${result.status}`);
console.log(result);

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