# Alibaba V2.6 · Reference to Video · Flash API

> 최대 5개의 이미지 또는 클립에서 피사체를 유지하는 빠른 reference-to-video, 5초 또는 10초, 오디오 지원

참조 파일의 피사체가 `prompt`에서 Character1, Character2 등으로 나타나는 동영상을 생성합니다. `video_urls`는 최대 3개, `image_urls`는 최대 5개를 조합할 수 있으며 총 참조 수는 최대 5개입니다. 길이는 5초 또는 10초, 해상도는 720p 또는 1080p이며 화면 비율은 16:9, 9:16, 1:1, 4:3 또는 3:4입니다. 멀티 샷 프롬프트와 오디오 생성을 켜거나 끌 수 있습니다.

- Model id: `wan/v2.6/reference-to-video/flash`
- Made by: Alibaba
- Category: Reference to Video
- Output: video
- Price per second of your output video: from $0.05 / second of output video (cheapest run $0.05 (50 API credits))
- Run: `POST https://api.doitong.com/v1/run/wan/v2.6/reference-to-video/flash`
- Quote: `POST https://api.doitong.com/v1/quote/wan/v2.6/reference-to-video/flash`
- Docs page: https://doitong.com/ko/developers/models/wan/v2.6/reference-to-video/flash

## Pricing

Price: **from $0.05 / second of output video** (the lowest tier; the quote prices your exact input). Price per second of your output video: the input files are measured before the run (length, resolution, frame rate). The quote measures the same files and is exactly what the run charges.

Price by tier:

- 720p, silent: $0.05 / second of output video
- 1080p, silent: $0.075 / second of output video
- 720p: $0.10 / second of output video
- 1080p: $0.15 / second of output video

The full example input below costs $0.75 = 750 API credits (5 s output video × $0.15 (1080p)).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.com/v1/quote/wan/v2.6/reference-to-video/flash` 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 |  | ≥ 1 characters | 최대 1500자의 동영상 프롬프트입니다. 참조 파일의 사람, 동물 또는 객체를 식별하기 위해 Character1, Character2 등을 사용합니다. 대상 번호는 video_urls를 먼저 따르고 image_urls로 이어집니다. 여러 샷에는 '[0-3s] Shot 1. [3-6s] Shot 2.' 형식을 사용합니다. |
| `video_urls` | `videos` | array of video URL \| null | no |  |  | 대상의 일관성을 유지하기 위해 동영상 0~3개를 제공합니다. 각 동영상은 최소 16 FPS, 길이 2–30초, 크기 100 MB 이하여야 합니다. video_urls와 image_urls의 합계는 5를 초과할 수 없습니다. 자동 대상 번호 지정은 video_urls에 Character1, Character2 등을 먼저 할당한 후 image_urls에 계속 할당합니다. |
| `image_urls` | `images` | array of image URL \| null | no |  |  | 대상의 일관성을 유지하기 위해 이미지 0~5개를 제공합니다. image_urls와 video_urls를 합한 참조 수는 5개를 초과할 수 없으며, image_urls에는 video_urls 다음 번호가 할당됩니다. 각 이미지는 해상도 240–5000px, 파일 크기 10 MB 이하여야 합니다. 허용 형식은 JPEG, JPG, BMP, WEBP 및 알파가 없는 PNG입니다. |
| `aspect_ratio` |  | enum (string) | no | `16:9` | `16:9`, `9:16`, `1:1`, `4:3`, `3:4` | 출력 동영상의 화면 비율입니다. |
| `resolution` |  | enum (string) | no | `1080p` | `720p`, `1080p` | 동영상 출력의 해상도 등급입니다. R2V Flash는 720p 또는 1080p만 지원합니다. |
| `duration` |  | enum (string) | no | `5` | `5`, `10` | 생성된 동영상의 길이를 초 단위로 설정합니다. R2V Flash에서 선택 가능한 길이는 5초 또는 10초로 제한됩니다. |
| `negative_prompt` |  | string \| null | no | `` |  | 원하지 않는 콘텐츠를 지정하는 네거티브 프롬프트입니다. 500자로 제한됩니다. |
| `enable_prompt_expansion` |  | boolean | no | `true` |  | LLM이 프롬프트를 다시 작성할지 제어합니다. |
| `multi_shots` |  | boolean | no | `true` |  | enable_prompt_expansion이 True로 설정된 경우에만 사용할 수 있는 샷 분할 제어입니다. 기본값 true는 지능형 분할을 사용해 샷 간 일관된 내러티브를 구성하고, false는 동영상을 하나의 연속 샷으로 유지합니다. |
| `generate_audio` |  | boolean | no | `true` |  | false로 무음 동영상 생성을 선택하거나, 오디오를 활성화해 생성된 동영상에 소리를 포함합니다. |
| `seed` |  | integer \| null | no |  |  | 생성을 재현 가능하게 하는 시드입니다. None으로 설정하면 무작위로 선택됩니다. |
| `enable_safety_checker` |  | boolean | no | `true` |  | 안전 검사 스위치입니다. 끔 설정에는 계정 인증이 필요합니다. 인증이 없으면 설정과 관계없이 모든 요청을 검사하며, true는 검사기를 활성화합니다. |

File parameters (`videos`, `images`) 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": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

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.com/v1/run/wan/v2.6/reference-to-video/flash?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.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.com/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/wan/v2.6/reference-to-video/flash?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.com/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/wan/v2.6/reference-to-video/flash", 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.com/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": "wan/v2.6/reference-to-video/flash",
      "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": "wan/v2.6/reference-to-video/flash",
  "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": 750,
    "usd": "0.75",
    "charged": 750,
    "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,
      "width": 1024,
      "height": 768,
      "fps": 1.0,
      "duration": 5,
      "num_frames": 1
    },
    "seed": 42,
    "actual_prompt": "Dance battle between Character1 and Character2, cinematic lighting, dynamic camera movement."
  },
  "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.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size, width, height, fps, duration, num_frames} | 결과 동영상 파일입니다. |
| `seed` | integer | 생성 중 사용하는 시드 값입니다. |
| `actual_prompt` | string \| null | 다시 쓰기가 활성화되었을 때 실제로 사용되는 프롬프트입니다. |

## Related models

- [Wan v2.6 Text to Image](https://doitong.com/developers/models/wan/v2.6/text-to-image.md) (`wan/v2.6/text-to-image`): $0.03 / image
- [Wan v2.6 Image to Image](https://doitong.com/developers/models/wan/v2.6/image-to-image.md) (`wan/v2.6/image-to-image`): $0.03 / image
- [Wan v2.6 Text to Video](https://doitong.com/developers/models/wan/v2.6/text-to-video.md) (`wan/v2.6/text-to-video`): from $0.10 / second
- [Wan v2.6 Image to Video](https://doitong.com/developers/models/wan/v2.6/image-to-video.md) (`wan/v2.6/image-to-video`): from $0.10 / second
- [Wan v2.6 Reference to Video](https://doitong.com/developers/models/wan/v2.6/reference-to-video.md) (`wan/v2.6/reference-to-video`): from $0.10 / 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 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

## Links

- HTML page: https://doitong.com/developers/models/wan/v2.6/reference-to-video/flash
- 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=wan/v2.6/reference-to-video/flash
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/wan/v2.6/reference-to-video/flash