# Seedance 2.0 Fast Reference to Video API

> Modo multi-referência do Seedance 2.0 mais rápido e económico, a 480p ou 720p com som.

Referencie até 9 imagens, 3 vídeos e 3 clips de áudio como @Image1, @Video1 e @Audio1 no prompt e obtenha uma cena de 4 a 15 segundos com som sincronizado a 480p ou 720p. É necessária pelo menos uma imagem ou vídeo, com um máximo de 12 ficheiros no total; os vídeos de referência devem totalizar entre 2 e 15 segundos e o áudio de referência no máximo 15 segundos. Os vídeos de referência são cobrados também pela sua própria duração, pelo que os clips com referências de vídeo custam mais por segundo.

- Model id: `bytedance/seedance-2.0/fast/reference-to-video`
- Made by: ByteDance
- Category: Reference to Video
- Output: video
- Price: from $0.113 / second (4 s ≈ $0.452) (cheapest run $0.452 (452 API credits))
- Run: `POST https://api.doitong.ru/v1/run/bytedance/seedance-2.0/fast/reference-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/bytedance/seedance-2.0/fast/reference-to-video`
- Docs page: https://doitong.com/pt-PT/developers/models/bytedance/seedance-2.0/fast/reference-to-video

## Pricing

Price: **from $0.113 / second (4 s ≈ $0.452)** (the lowest tier; the quote prices your exact input). Billed per second of output (`duration`, default 15).

Price rules (the first rule that matches the input wins; a parameter you leave out counts as its default):

- When `video_urls` is set and `duration` ≤ 4: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 5: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 6: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 7: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 8: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 9: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 10: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 11: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 12: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 13: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set and `duration` ≤ 14: by `resolution`, 480p: $0.113, 720p: $0.243 / second
- When `video_urls` is set: by `resolution`, 480p: $0.113, 720p: $0.243 / second

The full example input below costs $0.565 = 565 API credits (5 s × 113 API credits).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.ru/v1/quote/bytedance/seedance-2.0/fast/reference-to-video` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. 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 | yes |  |  | Prompt de texto que orienta a geração do vídeo. |
| `image_urls` | `images` | array of image URL | no |  | ≤ 9 items | Referências de imagem para orientação do vídeo, limitadas a 9 imagens e sujeitas a um máximo de 12 ficheiros em todas as modalidades. Cada imagem pode ter no máximo 30 MB e deve usar JPEG, PNG ou WebP. Use @Image1, @Image2 e os rótulos numerados seguintes para identificar estas referências no prompt. |
| `video_urls` | `videos` | array of video URL | no |  | ≤ 3 items | Referências de vídeo para geração, fornecidas como ficheiros MP4 ou MOV e identificadas no prompt por @Video1, @Video2 e os rótulos numerados seguintes. Cada uma deve ter uma resolução de aproximadamente 480p (640x640) a aproximadamente 720p (834x1112). O conjunto está limitado a 3 vídeos com menos de 50 MB no total e com uma duração agregada entre 2 e 15 segundos. |
| `audio_urls` | `audios` | array of audio URL | no |  | ≤ 3 items | As referências de áudio para orientação do vídeo exigem pelo menos uma referência de imagem ou vídeo acompanhante. Forneça ficheiros MP3 ou WAV com no máximo 15 MB cada, num máximo de 3 ficheiros e com uma duração agregada limitada a 15 segundos. Identifique-os no prompt usando @Audio1, @Audio2 e os rótulos numerados seguintes. |
| `resolution` |  | enum (string) | no | `720p` | `480p`, `720p` | Resolução de saída: 480p privilegia a velocidade de geração, enquanto 720p oferece uma opção equilibrada. |
| `duration` |  | enum (string) | no | `auto` | `auto`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15` | Seleção da duração do vídeo: `auto` delega a escolha ao modelo usando o prompt, enquanto uma duração explícita deve estar entre 4 e 15 segundos. |
| `aspect_ratio` |  | enum (string) | no | `auto` | `auto`, `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | Proporção da saída: 16:9 produz formato paisagem, 9:16 produz formato retrato/vertical, 1:1 produz formato quadrado e 21:9 produz formato ultrapanorâmico cinematográfico. Selecione `auto` para que o modelo escolha a proporção. |
| `generate_audio` |  | boolean | no | `true` |  | Ative esta opção para acompanhar o vídeo com áudio sincronizado. O áudio gerado inclui fala sincronizada com os movimentos dos lábios, ambiente e efeitos sonoros. |
| `bitrate_mode` |  | enum (string) | no | `standard` | `standard`, `high` | Escolha a taxa de bits da codificação de saída: 'standard' mantém a predefinição, enquanto 'high' pede ao modelo para melhorar a qualidade da codificação à custa de um ficheiro maior. |
| `codec` |  | enum (string) | no | `auto` | `auto`, `H264`, `H265` | Seleção do codec de vídeo: `auto` mantém inalterado o comportamento do codec predefinido, `H264` seleciona H.264 e `H265` seleciona H.265. |

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
{
  "prompt": "@Image1 The white sneaker spins slowly on a wet neon street, puddle splashes in slow motion, punchy beat"
}
```

A fuller example:

```json
{
  "prompt": "@Image1 The white sneaker spins slowly on a wet neon street, puddle splashes in slow motion, punchy beat",
  "images": [
    "https://content.doitong.com/images/showcase/v3/gen_sneaker_ad.jpg"
  ],
  "duration": 5,
  "resolution": "480p"
}
```

## 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-2.0/fast/reference-to-video?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "@Image1 The white sneaker spins slowly on a wet neon street, puddle splashes in slow motion, punchy beat",
    "images": [
      "https://content.doitong.com/images/showcase/v3/gen_sneaker_ad.jpg"
    ],
    "duration": 5,
    "resolution": "480p"
  }'

# 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-2.0/fast/reference-to-video?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "@Image1 The white sneaker spins slowly on a wet neon street, puddle splashes in slow motion, punchy beat",
    "images": [
      "https://content.doitong.com/images/showcase/v3/gen_sneaker_ad.jpg"
    ],
    "duration": 5,
    "resolution": "480p"
  }),
});
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": "@Image1 The white sneaker spins slowly on a wet neon street, puddle splashes in slow motion, punchy beat",
    "images": [
        "https://content.doitong.com/images/showcase/v3/gen_sneaker_ad.jpg",
    ],
    "duration": 5,
    "resolution": "480p",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/bytedance/seedance-2.0/fast/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-2.0/fast/reference-to-video",
      "input": {
        "prompt": "@Image1 The white sneaker spins slowly on a wet neon street, puddle splashes in slow motion, punchy beat",
        "images": [
          "https://content.doitong.com/images/showcase/v3/gen_sneaker_ad.jpg"
        ],
        "duration": 5,
        "resolution": "480p"
      },
      "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-2.0/fast/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": 565,
    "usd": "0.565",
    "charged": 565,
    "refunded": 0
  },
  "input": {
    "prompt": "@Image1 The white sneaker spins slowly on a wet neon street, puddle splashes in slow motion, punchy beat",
    "images": [
      "https://content.doitong.com/images/showcase/v3/gen_sneaker_ad.jpg"
    ],
    "duration": 5,
    "resolution": "480p"
  },
  "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
  },
  "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} | Ficheiro de vídeo produzido pela geração. |
| `seed` | integer | Valor da seed aplicado durante a geração. |

## Related models

- [Seedance 2.0 Fast Text to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/fast/text-to-video.md) (`bytedance/seedance-2.0/fast/text-to-video`): from $0.113 / second
- [Seedance 2.0 Mini Text to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/mini/text-to-video.md) (`bytedance/seedance-2.0/mini/text-to-video`): from $0.0721 / second
- [Seedance 2.0 Text to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/text-to-video.md) (`bytedance/seedance-2.0/text-to-video`): from $0.141 / second
- [Seedance 2.0 Fast Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/fast/image-to-video.md) (`bytedance/seedance-2.0/fast/image-to-video`): from $0.113 / second
- [Seedance 2.0 Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/image-to-video.md) (`bytedance/seedance-2.0/image-to-video`): from $0.141 / second
- [Seedance 2.0 Mini Image to Video](https://doitong.com/developers/models/bytedance/seedance-2.0/mini/image-to-video.md) (`bytedance/seedance-2.0/mini/image-to-video`): from $0.0721 / 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 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

## Links

- HTML page: https://doitong.com/developers/models/bytedance/seedance-2.0/fast/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-2.0/fast/reference-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/bytedance/seedance-2.0/fast/reference-to-video