> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apimart.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# wan2.5-preview 视频生成

>  - 万相 2.5 预览版视频生成模型
- 支持文生视频 (Text-to-Video) 和图生视频 (Image-to-Video)
- 支持 480p/720p/1080p 分辨率，5 或 10 秒时长
- 支持自动扩展提示词、自动配音和自定义音频 

<RequestExample>
  ```bash cURL theme={null}
  curl --request POST \
    --url https://api.apimart.ai/v1/videos/generations \
    --header 'Authorization: Bearer <token>' \
    --header 'Content-Type: application/json' \
    --data '{
      "model": "wan2.5-preview",
      "prompt": "夕阳下的海边公路，电影感镜头",
      "size": "16:9",
      "resolution": "720p",
      "duration": 5
    }'
  ```

  ```python Python theme={null}
  import requests

  url = "https://api.apimart.ai/v1/videos/generations"

  payload = {
      "model": "wan2.5-preview",
      "prompt": "夕阳下的海边公路，电影感镜头",
      "size": "16:9",
      "resolution": "720p",
      "duration": 5
  }

  headers = {
      "Authorization": "Bearer <token>",
      "Content-Type": "application/json"
  }

  response = requests.post(url, json=payload, headers=headers)

  print(response.json())
  ```

  ```javascript JavaScript theme={null}
  const url = "https://api.apimart.ai/v1/videos/generations";

  const payload = {
    model: "wan2.5-preview",
    prompt: "夕阳下的海边公路，电影感镜头",
    size: "16:9",
    resolution: "720p",
    duration: 5
  };

  const headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
  };

  fetch(url, {
    method: "POST",
    headers: headers,
    body: JSON.stringify(payload)
  })
    .then(response => response.json())
    .then(data => console.log(data))
    .catch(error => console.error('Error:', error));
  ```

  ```go Go theme={null}
  package main

  import (
      "bytes"
      "encoding/json"
      "fmt"
      "io/ioutil"
      "net/http"
  )

  func main() {
      url := "https://api.apimart.ai/v1/videos/generations"

      payload := map[string]interface{}{
          "model":      "wan2.5-preview",
          "prompt":     "夕阳下的海边公路，电影感镜头",
          "size":       "16:9",
          "resolution": "720p",
          "duration":   5,
      }

      jsonData, _ := json.Marshal(payload)

      req, _ := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
      req.Header.Set("Authorization", "Bearer <token>")
      req.Header.Set("Content-Type", "application/json")

      client := &http.Client{}
      resp, err := client.Do(req)
      if err != nil {
          panic(err)
      }
      defer resp.Body.Close()

      body, _ := ioutil.ReadAll(resp.Body)
      fmt.Println(string(body))
  }
  ```

  ```java Java theme={null}
  import java.net.http.HttpClient;
  import java.net.http.HttpRequest;
  import java.net.http.HttpResponse;
  import java.net.URI;

  public class Main {
      public static void main(String[] args) throws Exception {
          String url = "https://api.apimart.ai/v1/videos/generations";

          String payload = """
          {
            "model": "wan2.5-preview",
            "prompt": "夕阳下的海边公路，电影感镜头",
            "size": "16:9",
            "resolution": "720p",
            "duration": 5
          }
          """;

          HttpClient client = HttpClient.newHttpClient();
          HttpRequest request = HttpRequest.newBuilder()
              .uri(URI.create(url))
              .header("Authorization", "Bearer <token>")
              .header("Content-Type", "application/json")
              .POST(HttpRequest.BodyPublishers.ofString(payload))
              .build();

          HttpResponse<String> response = client.send(request,
              HttpResponse.BodyHandlers.ofString());

          System.out.println(response.body());
      }
  }
  ```

  ```php PHP theme={null}
  <?php

  $url = "https://api.apimart.ai/v1/videos/generations";

  $payload = [
      "model" => "wan2.5-preview",
      "prompt" => "夕阳下的海边公路，电影感镜头",
      "size" => "16:9",
      "resolution" => "720p",
      "duration" => 5
  ];

  $ch = curl_init($url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
  curl_setopt($ch, CURLOPT_HTTPHEADER, [
      "Authorization: Bearer <token>",
      "Content-Type: application/json"
  ]);

  $response = curl_exec($ch);
  curl_close($ch);

  echo $response;
  ?>
  ```

  ```ruby Ruby theme={null}
  require 'net/http'
  require 'json'
  require 'uri'

  url = URI("https://api.apimart.ai/v1/videos/generations")

  payload = {
    model: "wan2.5-preview",
    prompt: "夕阳下的海边公路，电影感镜头",
    size: "16:9",
    resolution: "720p",
    duration: 5
  }

  http = Net::HTTP.new(url.host, url.port)
  http.use_ssl = true

  request = Net::HTTP::Post.new(url)
  request["Authorization"] = "Bearer <token>"
  request["Content-Type"] = "application/json"
  request.body = payload.to_json

  response = http.request(request)
  puts response.body
  ```

  ```swift Swift theme={null}
  import Foundation

  let url = URL(string: "https://api.apimart.ai/v1/videos/generations")!

  let payload: [String: Any] = [
      "model": "wan2.5-preview",
      "prompt": "夕阳下的海边公路，电影感镜头",
      "size": "16:9",
      "resolution": "720p",
      "duration": 5
  ]

  var request = URLRequest(url: url)
  request.httpMethod = "POST"
  request.setValue("Bearer <token>", forHTTPHeaderField: "Authorization")
  request.setValue("application/json", forHTTPHeaderField: "Content-Type")
  request.httpBody = try? JSONSerialization.data(withJSONObject: payload)

  let task = URLSession.shared.dataTask(with: request) { data, response, error in
      if let error = error {
          print("Error: \(error)")
          return
      }

      if let data = data, let responseString = String(data: data, encoding: .utf8) {
          print(responseString)
      }
  }

  task.resume()
  ```

  ```csharp C# theme={null}
  using System;
  using System.Net.Http;
  using System.Text;
  using System.Threading.Tasks;

  class Program
  {
      static async Task Main(string[] args)
      {
          var url = "https://api.apimart.ai/v1/videos/generations";

          var payload = @"{
              ""model"": ""wan2.5-preview"",
              ""prompt"": ""夕阳下的海边公路，电影感镜头"",
              ""size"": ""16:9"",
              ""resolution"": ""720p"",
              ""duration"": 5
          }";

          using var client = new HttpClient();
          client.DefaultRequestHeaders.Add("Authorization", "Bearer <token>");

          var content = new StringContent(payload, Encoding.UTF8, "application/json");
          var response = await client.PostAsync(url, content);
          var result = await response.Content.ReadAsStringAsync();

          Console.WriteLine(result);
      }
  }
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "code": 200,
    "data": [
      {
        "status": "submitted",
        "task_id": "task_01J9HA7JPQ9A0Z6JZ3V8M9W6PZ"
      }
    ]
  }
  ```

  ```json 400 theme={null}
  {
    "error": {
      "code": 400,
      "message": "请求参数无效",
      "type": "invalid_request_error"
    }
  }
  ```

  ```json 401 theme={null}
  {
    "error": {
      "code": 401,
      "message": "身份验证失败，请检查您的API密钥",
      "type": "authentication_error"
    }
  }
  ```

  ```json 402 theme={null}
  {
    "error": {
      "code": 402,
      "message": "账户余额不足，请充值后再试",
      "type": "payment_required"
    }
  }
  ```

  ```json 429 theme={null}
  {
    "error": {
      "code": 429,
      "message": "请求过于频繁，请稍后再试",
      "type": "rate_limit_error"
    }
  }
  ```

  ```json 500 theme={null}
  {
    "error": {
      "code": 500,
      "message": "服务器内部错误，请稍后重试",
      "type": "server_error"
    }
  }
  ```
</ResponseExample>

## 认证

<ParamField header="Authorization" type="string" required>
  所有接口均需要使用 Bearer Token 进行认证

  获取 API Key：

  访问 [API Key 管理页面](https://apimart.ai/keys) 获取您的 API Key

  使用时在请求头中添加：

  ```
  Authorization: Bearer YOUR_API_KEY
  ```
</ParamField>

## 请求参数

<ParamField body="model" type="string" required>
  视频生成模型名称，固定为 `wan2.5-preview`
</ParamField>

<ParamField body="prompt" type="string">
  视频内容描述

  文生视频（无 `image_urls`）时**必填**，图生视频时可选但建议填写

  建议详细描述场景、动作、风格等

  示例：`"夕阳下的海边公路，电影感镜头"`
</ParamField>

<ParamField body="image_urls" type="array<string>">
  参考图片 URL 数组（仅支持 1 张首帧图片）

  图生视频模式下必填，支持公网可访问的图片 URL 或 Base64 编码（`data:image/png;base64,...`）

  示例：`["https://example.com/image.jpg"]`

  <Note>
    系统会根据请求中是否包含 `image_urls` 自动选择文生视频或图生视频模式。文生模式**不要**传 `image_urls`。
  </Note>
</ParamField>

<ParamField body="negative_prompt" type="string">
  反向提示词，描述不希望出现的内容

  最多 500 字符

  示例：`"模糊, 低质量, 变形"`
</ParamField>

<ParamField body="resolution" type="string" default="720p">
  视频分辨率

  可选值：

  * `480p` - 标清，支持 size：`16:9`、`9:16`、`1:1`
  * `720p` - 高清（默认），支持 size：`16:9`、`9:16`、`1:1`、`4:3`、`3:4`
  * `1080p` - 超清，支持 size：`16:9`、`9:16`、`1:1`、`4:3`、`3:4`

  默认值：`720p`

  <Note>
    分辨率直接影响费用，1080p > 720p > 480p。
  </Note>

  <Warning>
    480p 仅支持 `16:9`、`9:16`、`1:1` 三种比例，传 `4:3` 或 `3:4` 会报错
  </Warning>
</ParamField>

<ParamField body="duration" type="integer" default="5">
  视频时长（秒）

  仅支持：`5` 或 `10` 秒

  默认值：`5`
</ParamField>

<ParamField body="size" type="string" default="16:9">
  画面宽高比，**仅文生视频**（无 `image_urls`）有效

  可选值取决于 `resolution`：

  **480p：**

  * `16:9` - 横屏（默认）
  * `9:16` - 竖屏
  * `1:1` - 方形

  **720p / 1080p：**

  * `16:9` - 横屏（默认）
  * `9:16` - 竖屏
  * `1:1` - 方形
  * `4:3` - 横屏
  * `3:4` - 竖屏

  默认值：`16:9`

  <Warning>
    图生视频的宽高比由输入图片决定，**不要**传 `size`，否则会报错
  </Warning>
</ParamField>

<ParamField body="seed" type="integer">
  随机种子（≥0），指定相同种子可复现相似结果

  示例：`12345`
</ParamField>

<ParamField body="prompt_extend" type="boolean" default="true">
  是否开启 prompt 智能改写

  对较短提示词效果提升明显，但会增加耗时

  默认值：`true`
</ParamField>

<ParamField body="audio" type="boolean" default="true">
  是否自动添加音频

  启用后系统会为视频自动生成匹配的音频

  默认值：`true`

  <Warning>
    该模型仅支持 `audio=true`，不支持设为 `false` 生成无声视频
  </Warning>
</ParamField>

<ParamField body="audio_url" type="string">
  自定义音频 URL（wav/mp3，3-30 秒，≤ 15MB）

  若音频长度超过视频时长，自动截取；不足则超出部分为无声

  <Warning>
    音频文件要求：

    * 格式：wav、mp3
    * 时长：3-30 秒
    * 大小：≤ 15MB
  </Warning>
</ParamField>

<ParamField body="watermark" type="boolean" default="false">
  是否添加 "AI生成" 水印（右下角）

  默认值：`false`
</ParamField>

## 分辨率与宽高比组合

`size` 与 `resolution` 组合映射为上游像素尺寸（**仅文生视频有效**）：

| 宽高比    | 说明     | 480p 尺寸 | 720p 尺寸  | 1080p 尺寸  |
| ------ | ------ | ------- | -------- | --------- |
| `16:9` | 横屏（默认） | 832×480 | 1280×720 | 1920×1080 |
| `9:16` | 竖屏     | 480×832 | 720×1280 | 1080×1920 |
| `1:1`  | 方形     | 624×624 | 960×960  | 1440×1440 |
| `4:3`  | 横屏     | -       | 1088×832 | 1632×1248 |
| `3:4`  | 竖屏     | -       | 832×1088 | 1248×1632 |

<Note>
  480p 仅支持 `16:9`、`9:16`、`1:1` 三种比例，传 `4:3` 或 `3:4` 会报错。720p 和 1080p 支持全部 5 种比例。
</Note>

## 响应

<ResponseField name="code" type="integer">
  响应状态码，成功时为 200
</ResponseField>

<ResponseField name="data" type="array">
  返回数据数组

  <Expandable title="数组元素">
    <ResponseField name="status" type="string">
      任务状态，初始提交时为 `submitted`
    </ResponseField>

    <ResponseField name="task_id" type="string">
      任务唯一标识符，用于查询任务状态和结果
    </ResponseField>
  </Expandable>
</ResponseField>

## 使用场景

### 场景 1：文生视频（简单请求）

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "夕阳下的海边公路，电影感镜头"
}
```

### 场景 2：文生视频（完整参数）

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "城市夜景，霓虹灯与雨后街道",
  "negative_prompt": "模糊, 低质量, 变形",
  "size": "16:9",
  "resolution": "720p",
  "duration": 5,
  "seed": 12345,
  "prompt_extend": true,
  "audio": true,
  "watermark": false
}
```

### 场景 3：图生视频

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "猫咪在草地上奔跑",
  "image_urls": ["https://example.com/cat.jpg"],
  "resolution": "480p",
  "duration": 5
}
```

### 场景 4：图生视频（Base64 图片）

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "让猫咪站起来走动",
  "image_urls": ["data:image/png;base64,iVBORw0KGgo..."],
  "duration": 5
}
```

### 场景 5：自定义音频

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "人物随着音乐起舞",
  "image_urls": ["https://example.com/dancer.jpg"],
  "audio_url": "https://example.com/music.mp3",
  "resolution": "720p",
  "duration": 10
}
```

## 模式说明

### 文生视频 (Text-to-Video)

* 必须提供 `prompt` 参数
* 不需要 `image_urls` 参数
* 可通过 `size` 指定画面宽高比

### 图生视频 (Image-to-Video)

* 必须提供 `image_urls` 参数（仅支持 1 张图片）
* `prompt` 参数可选，用于描述期望的动作
* 宽高比由输入图片决定，**不要**传 `size`

<Note>
  系统会根据请求中是否包含 `image_urls` 自动选择模式
</Note>

<Note>
  **查询任务结果**

  视频生成为异步任务，提交后会返回 `task_id`。使用 [获取任务状态](/cn/api-reference/tasks/status) 接口查询生成进度和结果。
</Note>