> ## 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 Video Generation

>  - Wanxiang 2.5 preview video generation model
- Supports Text-to-Video and Image-to-Video
- Supports 480p/720p/1080p resolution, 5 or 10 seconds duration
- Supports auto prompt extension, auto audio and custom audio 

<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": "Sunset coastal highway, cinematic shot",
      "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": "Sunset coastal highway, cinematic shot",
      "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: "Sunset coastal highway, cinematic shot",
    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":     "Sunset coastal highway, cinematic shot",
          "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": "Sunset coastal highway, cinematic shot",
            "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" => "Sunset coastal highway, cinematic shot",
      "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: "Sunset coastal highway, cinematic shot",
    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": "Sunset coastal highway, cinematic shot",
      "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"": ""Sunset coastal highway, cinematic shot"",
              ""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": "Invalid request parameters",
      "type": "invalid_request_error"
    }
  }
  ```

  ```json 401 theme={null}
  {
    "error": {
      "code": 401,
      "message": "Authentication failed, please check your API key",
      "type": "authentication_error"
    }
  }
  ```

  ```json 402 theme={null}
  {
    "error": {
      "code": 402,
      "message": "Insufficient balance, please top up",
      "type": "payment_required"
    }
  }
  ```

  ```json 429 theme={null}
  {
    "error": {
      "code": 429,
      "message": "Too many requests, please try again later",
      "type": "rate_limit_error"
    }
  }
  ```

  ```json 500 theme={null}
  {
    "error": {
      "code": 500,
      "message": "Internal server error. Please try again later",
      "type": "server_error"
    }
  }
  ```
</ResponseExample>

## Authentication

<ParamField header="Authorization" type="string" required>
  All endpoints require Bearer Token authentication

  Get API Key:

  Visit the [API Key Management Page](https://apimart.ai/keys) to get your API Key

  Add to request header:

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

## Request Parameters

<ParamField body="model" type="string" required>
  Video generation model name, fixed as `wan2.5-preview`
</ParamField>

<ParamField body="prompt" type="string">
  Video content description

  **Required** for text-to-video (without `image_urls`), optional but recommended for image-to-video

  Describe scenes, actions, styles in detail for better results

  Example: `"Sunset coastal highway, cinematic shot"`
</ParamField>

<ParamField body="image_urls" type="array<string>">
  Reference image URL array (only 1 image supported)

  Required for image-to-video mode, supports publicly accessible image URLs or Base64 encoding (`data:image/png;base64,...`)

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

  <Note>
    The system automatically selects text-to-video or image-to-video mode based on whether `image_urls` is included. **Do not** pass `image_urls` for text-to-video mode.
  </Note>
</ParamField>

<ParamField body="negative_prompt" type="string">
  Negative prompt, describes unwanted content

  Maximum 500 characters

  Example: `"blurry, low quality, distorted"`
</ParamField>

<ParamField body="resolution" type="string" default="720p">
  Video resolution

  Options:

  * `480p` - SD, supports size: `16:9`, `9:16`, `1:1`
  * `720p` - HD (default), supports size: `16:9`, `9:16`, `1:1`, `4:3`, `3:4`
  * `1080p` - FHD, supports size: `16:9`, `9:16`, `1:1`, `4:3`, `3:4`

  Default: `720p`

  <Note>
    Resolution directly affects pricing: 1080p > 720p > 480p.
  </Note>

  <Warning>
    480p only supports `16:9`, `9:16`, `1:1` ratios. Passing `4:3` or `3:4` will result in an error.
  </Warning>
</ParamField>

<ParamField body="duration" type="integer" default="5">
  Video duration (seconds)

  Only supports: `5` or `10` seconds

  Default: `5`
</ParamField>

<ParamField body="size" type="string" default="16:9">
  Aspect ratio, **only effective for text-to-video** (without `image_urls`)

  Options depend on `resolution`:

  **480p:**

  * `16:9` - Landscape (default)
  * `9:16` - Portrait
  * `1:1` - Square

  **720p / 1080p:**

  * `16:9` - Landscape (default)
  * `9:16` - Portrait
  * `1:1` - Square
  * `4:3` - Landscape
  * `3:4` - Portrait

  Default: `16:9`

  <Warning>
    For image-to-video, the aspect ratio is determined by the input image. **Do not** pass `size`, otherwise an error will be returned.
  </Warning>
</ParamField>

<ParamField body="seed" type="integer">
  Random seed (≥0), specifying the same seed can reproduce similar results

  Example: `12345`
</ParamField>

<ParamField body="prompt_extend" type="boolean" default="true">
  Whether to enable smart prompt rewriting

  Significantly improves results for shorter prompts, but increases processing time

  Default: `true`
</ParamField>

<ParamField body="audio" type="boolean" default="true">
  Whether to automatically add audio

  When enabled, the system will generate matching audio for the video

  Default: `true`

  <Warning>
    This model only supports `audio=true`. Setting to `false` for silent video is not supported.
  </Warning>
</ParamField>

<ParamField body="audio_url" type="string">
  Custom audio URL (wav/mp3, 3-30 seconds, ≤ 15MB)

  If the audio is longer than the video duration, it will be automatically trimmed; if shorter, the remaining part will be silent

  <Warning>
    Audio file requirements:

    * Format: wav, mp3
    * Duration: 3-30 seconds
    * Size: ≤ 15MB
  </Warning>
</ParamField>

<ParamField body="watermark" type="boolean" default="false">
  Whether to add an "AI Generated" watermark (bottom right)

  Default: `false`
</ParamField>

## Resolution and Aspect Ratio Combinations

`size` and `resolution` combinations map to upstream pixel dimensions (**only effective for text-to-video**):

| Aspect Ratio | Description         | 480p Size | 720p Size | 1080p Size |
| ------------ | ------------------- | --------- | --------- | ---------- |
| `16:9`       | Landscape (default) | 832×480   | 1280×720  | 1920×1080  |
| `9:16`       | Portrait            | 480×832   | 720×1280  | 1080×1920  |
| `1:1`        | Square              | 624×624   | 960×960   | 1440×1440  |
| `4:3`        | Landscape           | -         | 1088×832  | 1632×1248  |
| `3:4`        | Portrait            | -         | 832×1088  | 1248×1632  |

<Note>
  480p only supports `16:9`, `9:16`, `1:1` ratios. Passing `4:3` or `3:4` will result in an error. 720p and 1080p support all 5 ratios.
</Note>

## Response

<ResponseField name="code" type="integer">
  Response status code, 200 on success
</ResponseField>

<ResponseField name="data" type="array">
  Response data array

  <Expandable title="Array elements">
    <ResponseField name="status" type="string">
      Task status, `submitted` on initial submission
    </ResponseField>

    <ResponseField name="task_id" type="string">
      Unique task identifier for querying task status and results
    </ResponseField>
  </Expandable>
</ResponseField>

## Use Cases

### Case 1: Text-to-Video (Simple)

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "Sunset coastal highway, cinematic shot"
}
```

### Case 2: Text-to-Video (Full Parameters)

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "City night scene, neon lights and rain-soaked streets",
  "negative_prompt": "blurry, low quality, distorted",
  "size": "16:9",
  "resolution": "720p",
  "duration": 5,
  "seed": 12345,
  "prompt_extend": true,
  "audio": true,
  "watermark": false
}
```

### Case 3: Image-to-Video

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "Cat running on the grass",
  "image_urls": ["https://example.com/cat.jpg"],
  "resolution": "480p",
  "duration": 5
}
```

### Case 4: Image-to-Video (Base64 Image)

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "Make the cat stand up and walk",
  "image_urls": ["data:image/png;base64,iVBORw0KGgo..."],
  "duration": 5
}
```

### Case 5: Custom Audio

```json theme={null}
{
  "model": "wan2.5-preview",
  "prompt": "Person dancing to the music",
  "image_urls": ["https://example.com/dancer.jpg"],
  "audio_url": "https://example.com/music.mp3",
  "resolution": "720p",
  "duration": 10
}
```

## Mode Description

### Text-to-Video

* `prompt` parameter is required
* Do not pass `image_urls`
* Use `size` to specify aspect ratio

### Image-to-Video

* `image_urls` parameter is required (only 1 image supported)
* `prompt` is optional, used to describe expected actions
* Aspect ratio is determined by the input image, **do not** pass `size`

<Note>
  The system automatically selects the mode based on whether `image_urls` is included
</Note>

<Note>
  **Query Task Results**

  Video generation is an asynchronous task that returns a `task_id` upon submission. Use the [Get Task Status](/en/api-reference/tasks/status) endpoint to query generation progress and results.
</Note>