# Seedance 2.5 US Reference to Video API

> Seedance 2.5-myndbandagerð, -vinnsla og -lenging út frá allt að 30 myndum, 10 myndböndum og 10 hljóðskrám

`task`-stilling skiptir á milli viðmiðunarstýrðrar gerðar, vinnslu viðmiðunarmyndbands og lengingar þess. Tekur við allt að 30 myndum, 10 myndböndum og 10 hljóðskrám sem viðmiðum, vísað í sem @Image1 og sambærilegt. Skilar 480p, 720p eða 1080p, auto eða 4 til 30 sekúndum, með stærðarhlutföllum frá 21:9 til 9:16. Styður `seed` og `bitrate_mode`.

- Model id: `bytedance/seedance-2.5/us/reference-to-video`
- Made by: ByteDance
- Category: Reference to Video
- Output: video
- Charged by usage (up to $6.944 per run; the rest of the hold is refunded): $0.0107 / 1000 tokens (cheapest run $0.416 (416 API credits))
- Run: `POST https://api.doitong.ru/v1/run/bytedance/seedance-2.5/us/reference-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/bytedance/seedance-2.5/us/reference-to-video`
- Docs page: https://doitong.com/is/developers/models/bytedance/seedance-2.5/us/reference-to-video

## Pricing

Price: **$0.0107 / 1000 tokens**. Charged by actual usage at $0.0107 / 1000 tokens: up to $6.944 per run (the quote gives the maximum for your input), the rest is refunded automatically after the run.

The full example input below holds up to $6.944 = 6944 API credits (up to 648.9 × 1000 tokens × $0.0107) when it starts.

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). This model is charged by usage: `POST https://api.doitong.ru/v1/quote/bytedance/seedance-2.5/us/reference-to-video` with the same JSON body returns the most the run can cost for that input (`credits`, debited when the run starts); after the run you pay the usage the model reports and the rest is refunded automatically. An input whose maximum would exceed the per-run limit is refused with 422. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

Send either the canonical name or the native field name (not both). Canonical names are the same across models.

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `prompt` |  | string \| null | no |  |  | Textakvaðning sem stýrir efnisgerð myndbands. |
| `task` |  | enum (string) | no | `reference` | `reference`, `editing`, `extension` | Val á myndbandsverkefni með þremur hegðunum: `reference` stýrir efnisgerð með uppgefnum miðlum, editing breytir tilvísunarmyndbandi og extension heldur einu áfram. editing og extension stilla bæði `aspect_ratio` sjálfkrafa á `auto`; editing stillir einnig `duration` á `auto`. |
| `image_urls` | `images` | array of image URL | no |  |  | Myndtilvísanir fyrir leiðsögn myndbands, takmarkaðar við 30 myndir og háðar hámarki 50 skráa yfir allar miðlategundir. Hver mynd má mest vera 30 MB og verður að nota JPG, PNG, WebP, BMP, TIFF, GIF, HEIC eða HEIF. Notaðu @Image1, @Image2 og síðari númeruð merki til að auðkenna þessar tilvísanir í kvaðningunni. |
| `video_urls` | `videos` | array of video URL | no |  |  | Gefðu upp allt að 10 tilvísunarmyndbönd sem MP4- eða MOV-skrár til að stýra efnisgerð og auðkenndu þau í kvaðningunni með @Video1, @Video2 og síðari númeruðum merkjum. Hver skrá má ekki vera stærri en 200 MB og verður að vara í 1.8–30.2 sekúndur; allar saman mega þær í mesta lagi vera 30.2 sekúndur. Nauðsynlegir eiginleikar myndbands eru 24–60 FPS, hlutfall 0.4–2.5 og 300–6,000 punktar á hvorri hlið. |
| `audio_urls` | `audios` | array of audio URL | no |  |  | Hljóðtilvísanir fyrir leiðsögn myndbands hafa samanlagða lengdartakmörkun upp á 30.2 sekúndur yfir allt að 10 skrár. Hver verður að vera MP3 eða WAV, vara í 1.8–30.2 sekúndur og vera að hámarki 15 MB. Auðkenndu skrárnar í kvaðningunni með @Audio1, @Audio2 og síðari númeruðum merkjum. |
| `resolution` |  | enum (string) | no | `720p` | `480p`, `720p`, `1080p` | Úttaksupplausn: 480p leggur áherslu á hraða, 720p býður upp á jafnvægi og 1080p gefur mikil gæði. |
| `duration` |  | enum (string) | no | `auto` | `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` | Val á lengd myndbands: `auto` felur líkaninu valið með kvaðningunni, en ákveðin lengd verður að vera frá 4 til 30 sekúndur. |
| `aspect_ratio` |  | enum (string) | no | `auto` | `auto`, `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | Hlutfall úttaks: 16:9 gefur landslag, 9:16 andlitsmynd/lóðrétt, 1:1 ferning og 21:9 kvikmyndalegt ofurbreitt snið. Veldu `auto` til að láta líkanið velja hlutfallið. |
| `generate_audio` |  | boolean | no | `true` |  | Virkjaðu þetta til að fylgja myndbandinu eftir með samstilltu hljóði. Myndað hljóð inniheldur tal sem passar við varahreyfingar, umhverfishljóð og hljóðbrellur. |
| `bitrate_mode` |  | enum (string) | no | `standard` | `standard`, `high` | Veldu bitahraða úttakskóðunar: 'standard' heldur sjálfgefnu gildi, en 'high' biður líkanið um betri kóðun á kostnað stærri skráar. |
| `codec` |  | enum (string) | no | `auto` | `auto`, `H264`, `H265` | Val á myndbandskóðalykli: `auto` breytir sjálfgefinni hegðun ekki, `H264` velur H.264 og `H265` velur H.265. |
| `seed` |  | integer \| null | no |  |  | Slembifræ sem notað er til að gera efnisgerð endurtekningarhæfa, án tryggingar á nákvæmri endurtekningu: endurnotkun þess getur samt gefið örlítið mismunandi niðurstöður. |
| `end_user_id` |  | string \| null | no |  |  | Einstakt auðkenni sem úthlutað er lokanotanda. |

File parameters (`images`, `videos`, `audios`) take a public `https://` URL, a `data:` URI up to 10 MB, or the `file_url` of an upload from `POST /files`.

## Example input

Required parameters only:

```json
{}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.ru/v1/run/bytedance/seedance-2.5/us/reference-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.ru/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.ru/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/bytedance/seedance-2.5/us/reference-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.ru/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/bytedance/seedance-2.5/us/reference-to-video", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.ru/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "bytedance/seedance-2.5/us/reference-to-video",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "bytedance/seedance-2.5/us/reference-to-video",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 6944,
    "usd": "6.944",
    "charged": 6944,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200
    },
    "seed": 42,
    "draft_id": "string"
  },
  "outputs": [
    {
      "type": "video",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_size": 1843200,
      "width": 1280,
      "height": 720,
      "duration": 5,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | Myndbandsskrá sem verður til við efnisgerð. |
| `seed` | integer | Sáðgildi sem beitt er við efnisgerð. |
| `draft_id` | string \| null | Auðkenni uppkasts til fullgerðar undir sama reikningi innan sjö daga; svarið inniheldur null í staðinn ef uppkastahamur er óvirkur. |

## Related models

- [Seedance 2.5 US Text to Video](https://doitong.com/developers/models/bytedance/seedance-2.5/us/text-to-video.md) (`bytedance/seedance-2.5/us/text-to-video`): $0.0107 / 1000 tokens
- [Seedance 2.5 US Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.5/us/image-to-video.md) (`bytedance/seedance-2.5/us/image-to-video`): $0.0107 / 1000 tokens
- [Seedance 2.0 Fast Reference to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/fast/reference-to-video.md) (`bytedance/seedance-2.0/fast/reference-to-video`): from $0.113 / second
- [Seedance 2.0 Reference to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/reference-to-video.md) (`bytedance/seedance-2.0/reference-to-video`): from $0.141 / second
- [Wan 3.0 Reference to Video](https://doitong.com/developers/models/alibaba/wan-3.0/reference-to-video.md) (`alibaba/wan-3.0/reference-to-video`): from $0.05 / second
- [Seedance 2.0 Mini](https://doitong.com/developers/models/bytedance/seedance-2.0/mini/reference-to-video.md) (`bytedance/seedance-2.0/mini/reference-to-video`): $0.007 / 1000 tokens
- [Seedance 2.0 US Reference to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/us/reference-to-video.md) (`bytedance/seedance-2.0/us/reference-to-video`): from $0.0096 / 1000 tokens
- [Alibaba V2.6 · Reference to Video · Flash](https://doitong.com/developers/models/wan/v2.6/reference-to-video/flash.md) (`wan/v2.6/reference-to-video/flash`): from $0.05 / second of output video

## Links

- HTML page: https://doitong.com/developers/models/bytedance/seedance-2.5/us/reference-to-video
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=bytedance/seedance-2.5/us/reference-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/bytedance/seedance-2.5/us/reference-to-video