> ## 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.

# wan2.6-i2v-flash Image-to-Video

>  - Wanxiang 2.6 fast image-to-video model
- Generates smooth video from first-frame image and text prompts
- Supports audio/silent toggle, multi-shot narration, custom audio
- Supports 720p/1080p resolution, 2-15 seconds duration
- Supports video effect templates 

<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": "wan2.6-i2v-flash",
      "prompt": "The person turns around and smiles",
      "image_urls": ["https://example.com/portrait.jpg"],
      "resolution": "1080p",
      "duration": 5
    }'
  ```

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

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

  payload = {
      "model": "wan2.6-i2v-flash",
      "prompt": "The person turns around and smiles",
      "image_urls": ["https://example.com/portrait.jpg"],
      "resolution": "1080p",
      "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: "wan2.6-i2v-flash",
    prompt: "The person turns around and smiles",
    image_urls: ["https://example.com/portrait.jpg"],
    resolution: "1080p",
    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":      "wan2.6-i2v-flash",
          "prompt":     "The person turns around and smiles",
          "image_urls": []string{"https://example.com/portrait.jpg"},
          "resolution": "1080p",
          "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": "wan2.6-i2v-flash",
            "prompt": "The person turns around and smiles",
            "image_urls": ["https://example.com/portrait.jpg"],
            "resolution": "1080p",
            "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" => "wan2.6-i2v-flash",
      "prompt" => "The person turns around and smiles",
      "image_urls" => ["https://example.com/portrait.jpg"],
      "resolution" => "1080p",
      "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: "wan2.6-i2v-flash",
    prompt: "The person turns around and smiles",
    image_urls: ["https://example.com/portrait.jpg"],
    resolution: "1080p",
    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": "wan2.6-i2v-flash",
      "prompt": "The person turns around and smiles",
      "image_urls": ["https://example.com/portrait.jpg"],
      "resolution": "1080p",
      "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"": ""wan2.6-i2v-flash"",
              ""prompt"": ""The person turns around and smiles"",
              ""image_urls"": [""https://example.com/portrait.jpg""],
              ""resolution"": ""1080p"",
              ""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 `wan2.6-i2v-flash`
</ParamField>

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

  Supports publicly accessible image URLs or Base64 encoding (`data:image/png;base64,...`)

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

  <Note>
    Image requirements:

    * Format: JPEG, JPG, PNG (no transparency), BMP, WEBP
    * Resolution: width/height range 240-8000 pixels
    * Size: ≤ 10MB
  </Note>
</ParamField>

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

  Optional but recommended for image-to-video, describes expected actions and effects

  Clearly specify subject, action, camera and style for better results

  Example: `"The person in the image smiles and waves, camera slowly zooms in"`
</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="1080p">
  Video resolution

  Options:

  * `720p` - HD
  * `1080p` - FHD (default)

  Default: `1080p`

  <Note>
    Resolution directly affects pricing, 1080p is more expensive than 720p. Aspect ratio is determined by the input image.
  </Note>
</ParamField>

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

  Supported range: `2` to `15` seconds (integer)

  Default: `5`
</ParamField>

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

  Set to `true`: automatically generates matching background music/sound effects (default)

  Set to `false`: outputs silent video

  Default: `true`

  <Note>
    Not supported when the model is `wan2.6-i2v`.
  </Note>
</ParamField>

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

  Lower priority than `audio`: ignored when `audio=false`

  If audio is longer than video duration, it will be 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="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="shot_type" type="string">
  Shot type, requires `prompt_extend=true`

  Options:

  * `single` - Single shot (default), outputs a continuous single-shot video
  * `multi` - Multi-shot, outputs a narrative video with multiple shot transitions

  <Note>
    `shot_type` has higher priority than `prompt`. Even if the prompt mentions "multi-shot", setting `single` will still output a single shot.
  </Note>
</ParamField>

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

  Example: `12345`
</ParamField>

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

  Default: `false`
</ParamField>

## Audio Control

| Parameter Combination               | Result                                     |
| ----------------------------------- | ------------------------------------------ |
| No `audio` or `audio_url`           | Auto-generated audio (default)             |
| `audio_url: "https://..."`          | Use specified audio                        |
| `audio: false`                      | Silent video                               |
| `audio: false` + `audio_url: "..."` | Silent video (`audio` has higher priority) |

## 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: Minimal Request

```json theme={null}
{
  "model": "wan2.6-i2v-flash",
  "image_urls": ["https://example.com/image.jpg"]
}
```

### Case 2: Full Parameters

```json theme={null}
{
  "model": "wan2.6-i2v-flash",
  "prompt": "The person in the image smiles and waves, camera slowly zooms in",
  "image_urls": ["https://example.com/image.jpg"],
  "negative_prompt": "blurry, low quality, distorted",
  "resolution": "1080p",
  "duration": 10,
  "seed": 12345,
  "prompt_extend": true,
  "shot_type": "multi",
  "audio": true,
  "watermark": false
}
```

### Case 3: Custom Audio

```json theme={null}
{
  "model": "wan2.6-i2v-flash",
  "prompt": "Person dancing to the music",
  "image_urls": ["https://example.com/dancer.jpg"],
  "audio_url": "https://example.com/music.mp3",
  "resolution": "1080p",
  "duration": 10
}
```

### Case 4: Silent Video

```json theme={null}
{
  "model": "wan2.6-i2v-flash",
  "prompt": "Flower slowly blooming",
  "image_urls": ["https://example.com/flower.jpg"],
  "audio": false,
  "resolution": "720p",
  "duration": 5
}
```

### Case 5: Effect Template

```json theme={null}
{
  "model": "wan2.6-i2v-flash",
  "image_urls": ["https://example.com/person.jpg"],
  "template": "flying",
  "resolution": "720p"
}
```

### Case 6: Base64 Image

```json theme={null}
{
  "model": "wan2.6-i2v-flash",
  "prompt": "Make the cat stand up and walk",
  "image_urls": ["data:image/png;base64,iVBORw0KGgo..."],
  "duration": 5
}
```

<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>