> ## 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 

```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);
    }
}
```

```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"
  }
}
```

## 认证

**Authorization** `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
```

## 请求参数

**model** `string` *required*

视频生成模型名称，固定为 `wan2.5-preview`

**nsfw\_check** `boolean` (default: false)

是否在提交视频任务前执行内容审核。

* `true`：使用 `omni-moderation-latest` 审核提示词和输入图片
* `false` 或不传：不发起审核请求，不增加审核成本与延迟（默认）

**prompt** `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"`

**image\_urls** `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`。

**negative\_prompt** `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"`

**resolution** `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。

> [!WARNING]
>
> 480p 仅支持 `16:9`、`9:16`、`1:1` 三种比例，传 `4:3` 或 `3:4` 会报错

**duration** `integer` (default: 5)

视频时长（秒）

仅支持：`5` 或 `10` 秒

默认值：`5`

**size** `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

**seed** `integer`

随机种子（≥0），指定相同种子可复现相似结果

示例：`12345`

**prompt\_extend** `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`

**audio** `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

**audio\_url** `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

**watermark** `boolean` (default: false)

是否添加 "AI生成" 水印（右下角）

默认值：`false`

## 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。

## 响应

**code** `integer`

响应状态码，成功时为 200

**data** `array`

返回数据数组

**数组元素**

**status** `string`

任务状态，初始提交时为 `submitted`

**task\_id** `string`

任务唯一标识符，用于查询任务状态和结果

## 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]
>
> **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](https://docs.apimart.ai/cn/api-reference/tasks/status.md) 接口查询生成进度和结果。


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