# H3 Max Reference to Video API

> 使用參考影像、影片與音訊片段保持主體一致的 H3 Max 影片生成

根據參考素材生成影片：最多 9 張影像、3 部影片與 3 個音訊片段，總檔案數最多 12 個。提示詞以 Image 1、Video 1、Audio 1 等名稱指代素材。可選的首幀、中間幀（`middle_image_url` 位於 `middle_frame_time`）與末幀可固定開頭、中段與結尾。`duration` 為 0.92 至 15 秒，`aspect_ratio` 可設為 adaptive。

- Model id: `minimax/h3-max/reference-to-video`
- Made by: MiniMax
- 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.ru/v1/run/minimax/h3-max/reference-to-video`
- Quote: `POST https://api.doitong.ru/v1/quote/minimax/h3-max/reference-to-video`
- Docs page: https://doitong.com/zh-TW/developers/models/minimax/h3-max/reference-to-video

## 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:

- 480P: $0.05 / second of output video
- 768P: $0.08 / second of output video
- 1080P: $0.16 / second of output video

The full example input below costs $0.40 = 400 API credits (5 s output video × $0.08 (768P)).

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/minimax/h3-max/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 |  | 1 – 50000 characters | 影片生成指示，依資產類型及其在各參考清單中的位置識別參考內容，使用 Audio 1、Video 1、Image 1、Image 2 等標籤。 |
| `reference_image_urls` | `images` | array of image URL | no |  | ≤ 9 items | 主體或風格參考圖像 URL，與所有影片和音訊參考共用 12 個檔案的上限。在提示詞中依清單位置使用 Image 1、Image 2 及後續標籤識別這些圖像。 |
| `reference_video_urls` |  | array of video URL | no |  | ≤ 3 items | 動作或其他參考影片 URL，在提示詞中依清單位置使用 Video 1、Video 2 及後續標籤識別。圖像、影片和音訊參考共用 12 個檔案的上限；每個影片片段須長 2–15 秒，總長度不得超過 15 秒。 |
| `reference_audio_urls` |  | array of audio URL | no |  | ≤ 3 items | 以 URL 提供參考音訊，並在提示詞中使用 Audio 1、Audio 2 及後續標籤識別片段。每個片段須長 2–15 秒，音訊總長度不得超過 15 秒。圖像、影片和音訊參考類型可單獨提供或組合提供，但共用上限為 12 個檔案。 |
| `image_url` | `image` | string (image URL) \| null | no |  | ≥ 1 characters | 可選的圖像 URL，用於定義精確的開頭影格並決定輸出畫布。參考資產會維持主體一致性。 |
| `middle_image_url` |  | string (image URL) \| null | no |  | ≥ 1 characters | 可選的 middle_frame_time 引導圖像，僅適用於原生 480P 或 768P 生成，且必須同時提供起始圖像和結尾圖像。 |
| `middle_frame_time` |  | number \| null | no |  | > 0, < 15 | 中間圖像的放置時間，僅可與 middle_image_url 搭配使用，且位置必須嚴格位於要求影片的第一個和最後一個影格之間。提供自開始起經過的秒數；數值會四捨五入至最接近的 24 fps 影格。 |
| `end_image_url` | `end_image` | string (image URL) \| null | no |  | ≥ 1 characters | 可選的最後圖像 URL，將影片的精確結尾影格固定為所提供的圖像。 |
| `duration` |  | number | no | `5` | 0.92 – 15 | 要求的持續時間（以秒為單位），實際影片長度最多可超出該要求約 0.7 s。 |
| `resolution` |  | enum (string) | no | `768P` | `480P`, `768P`, `1080P` | 生成解析度選擇：1080P 需要對原生以 768P 生成的素材進行潛在空間細化，而不是以所選解析度原生生成。 |
| `seed` |  | integer \| null | no |  |  | 隨機生成的種子；省略時會隨機選擇。 |
| `enable_safety_checker` |  | boolean | no | `true` |  | 安全檢查器啟用狀態；true 會啟用檢查。 |
| `prompt_expansion_mode` |  | string | yes | `balanced` |  | 生成前提示詞改寫程度：'quality' 最長約 30s，可產生更豐富的提示詞；'balanced' 約一秒返回。選擇 'disabled' 可略過提示詞擴充。 |
| `aspect_ratio` |  | enum (string) | no | `adaptive` | `adaptive`, `21:9`, `16:9`, `4:3`, `1:1`, `3:4`, `9:16` | 輸出影片的長寬比。 |
| `reference_conditions` |  | array of object {type, url} | no |  | ≤ 12 items | 作為 reference_*_urls 替代方案提供的參考清單，不得與其同時使用。不同模態之間的排序具有意義，因此整個處理過程會維持該順序。 |
| `reference_conditions[].type` |  | enum (string) | yes |  | `image`, `video`, `audio` | 參考內容的模態；清單中不同模態的排序具有意義。 |
| `reference_conditions[].url` |  | string | yes |  | ≥ 1 characters | 參考媒體的 URL。 |

File parameters (`images`, `reference_video_urls`, `reference_audio_urls`, `image`, `middle_image_url`, `end_image`) 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",
  "prompt_expansion_mode": "balanced"
}
```

A fuller example:

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

## 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/minimax/h3-max/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",
    "prompt_expansion_mode": "balanced"
  }'

# 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/minimax/h3-max/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",
    "prompt_expansion_mode": "balanced"
  }),
});
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",
    "prompt_expansion_mode": "balanced",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/minimax/h3-max/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": "minimax/h3-max/reference-to-video",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "prompt_expansion_mode": "balanced"
      },
      "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": "minimax/h3-max/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": 400,
    "usd": "0.40",
    "charged": 400,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "prompt_expansion_mode": "balanced"
  },
  "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
    },
    "expanded_prompt": "string",
    "seed": 42,
    "timings": {}
  },
  "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} | 模型產生的影片。 |
| `expanded_prompt` | string \| null | 供模型使用的擴充提示詞；若沒有可用的擴充文字則為 null。null 的情況包括停用擴充、擴充後沒有變更，以及由模型託管的 API 內部處理擴充。 |
| `seed` | integer | 用於重現生成結果的基礎種子。 |
| `timings` | object \| null | 以秒表示的時間測量值，僅在回報後端時間的路由上可用；否則為 null。'inference' 項目會測量 DiT 在 GPU 後端上進行去噪所需的時間。 |

## Related models

- [MiniMax H3 Max Text to Video](https://doitong.com/developers/models/minimax/h3-max/text-to-video.md) (`minimax/h3-max/text-to-video`): from $0.0325 / second of output video
- [H3 Max Camera Controls](https://doitong.com/developers/models/minimax/h3-max/camera-controls.md) (`minimax/h3-max/camera-controls`): from $0.0325 / second
- [H3 Max Image to Video](https://doitong.com/developers/models/minimax/h3-max/image-to-video.md) (`minimax/h3-max/image-to-video`): from $0.0325 / second of output video
- [H3 Max](https://doitong.com/developers/models/minimax/h3-max/insert-video.md) (`minimax/h3-max/insert-video`): from $0.05 / second
- [H3 Max Extend Video](https://doitong.com/developers/models/minimax/h3-max/extend-video.md) (`minimax/h3-max/extend-video`): from $0.05 / second of output video
- [H3 Max Recast](https://doitong.com/developers/models/minimax/h3-max/recast.md) (`minimax/h3-max/recast`): from $0.30 / second of input video
- [H3 Max Reframe](https://doitong.com/developers/models/minimax/h3-max/reframe-video.md) (`minimax/h3-max/reframe-video`): from $0.05 / second of input video
- [H3 Max Relight](https://doitong.com/developers/models/minimax/h3-max/relight.md) (`minimax/h3-max/relight`): from $0.05 / second of input video

## Links

- HTML page: https://doitong.com/developers/models/minimax/h3-max/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=minimax/h3-max/reference-to-video
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/minimax/h3-max/reference-to-video