# Seedance 2.0 Fast Reference to Video API

> Mode multi-référence Seedance 2.0 plus rapide et moins coûteux, en 480p ou 720p avec son.

Référencez jusqu’à 9 images, 3 vidéos et 3 clips audio sous la forme @Image1, @Video1, @Audio1 dans l’invite et obtenez une scène de 4 à 15 secondes avec son synchronisé en 480p ou 720p. Au moins une image ou une vidéo est requise, au plus 12 fichiers au total; les vidéos de référence doivent totaliser 2 à 15 secondes et l’audio de référence au plus 15 secondes. Les vidéos de référence sont facturées pour leur propre durée; les clips avec références vidéo coûtent donc plus cher par seconde.

- 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/fr-CA/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 |  |  | Invite textuelle qui guide la génération vidéo. |
| `image_urls` | `images` | array of image URL | no |  | ≤ 9 items | Références d’image pour guider la vidéo, limitées à 9 images et soumises à un maximum de 12 fichiers toutes modalités confondues. Chaque image peut peser au plus 30 MB et doit être au format JPEG, PNG ou WebP. Utilisez @Image1, @Image2 et les libellés numérotés suivants pour identifier ces références dans l’invite. |
| `video_urls` | `videos` | array of video URL | no |  | ≤ 3 items | Références vidéo pour la génération, fournies sous forme de fichiers MP4 ou MOV et identifiées dans l’invite par @Video1, @Video2 et les libellés numérotés suivants. Chacune doit avoir une résolution allant approximativement de 480p (640x640) à 720p (834x1112). L’ensemble est limité à 3 vidéos totalisant moins de 50 MB, pour une durée cumulée de 2 à 15 secondes. |
| `audio_urls` | `audios` | array of audio URL | no |  | ≤ 3 items | Les références audio pour guider la vidéo nécessitent au moins une référence d’image ou de vidéo associée. Fournissez des fichiers MP3 ou WAV d’au plus 15 MB chacun, avec un maximum de 3 fichiers et une durée cumulée plafonnée à 15 secondes. Identifiez-les dans l’invite avec @Audio1, @Audio2 et les libellés numérotés suivants. |
| `resolution` |  | enum (string) | no | `720p` | `480p`, `720p` | Résolution de sortie: 480p privilégie la rapidité de génération, tandis que 720p offre un choix équilibré. |
| `duration` |  | enum (string) | no | `auto` | `auto`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15` | Sélection de la durée vidéo: `auto` délègue le choix au modèle à partir de l’invite, tandis qu’une durée explicite doit être comprise entre 4 et 15 secondes. |
| `aspect_ratio` |  | enum (string) | no | `auto` | `auto`, `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | Rapport largeur/hauteur de sortie: 16:9 donne un format paysage, 9:16 un format portrait/vertical, 1:1 un format carré et 21:9 un format cinématographique ultralarge. Sélectionnez `auto` pour laisser le modèle choisir le rapport. |
| `generate_audio` |  | boolean | no | `true` |  | Activez cette option pour accompagner la vidéo d’un audio synchronisé. L’audio généré comprend une parole adaptée aux mouvements des lèvres, une ambiance et des effets sonores. |
| `bitrate_mode` |  | enum (string) | no | `standard` | `standard`, `high` | Choisissez le débit binaire d’encodage de sortie: 'standard' conserve la valeur par défaut, tandis que 'high' demande au modèle d’améliorer la qualité de l’encodage au prix d’un fichier plus volumineux. |
| `codec` |  | enum (string) | no | `auto` | `auto`, `H264`, `H265` | Sélection du codec vidéo: `auto` conserve le comportement par défaut, `H264` sélectionne H.264 et `H265` sélectionne 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} | Fichier vidéo produit par la génération. |
| `seed` | integer | Valeur de graine appliquée pendant la génération. |

## 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