Alibaba Cloud Model Studio:Wan - image-to-video API Reference

Request example

import base64
import os
from http import HTTPStatus
from dashscope import VideoSynthesis
import mimetypes
import dashscope

# The following is the URL for the Singapore region. If you use a model in the Beijing region, replace the URL with: https://dashscope.aliyuncs.com/api/v1
dashscope.base_http_api_url = 'https://dashscope-intl.aliyuncs.com/api/v1'


# If you have not configured an environment variable, replace the following line with your Model Studio API key: api_key="sk-xxx"
# The API keys for the Singapore and Beijing regions are different. Get an API key: https://www.alibabacloud.com/help/en/model-studio/get-api-key
api_key = os.getenv("DASHSCOPE_API_KEY")

# --- Helper function for Base64 encoding ---
# Format: data:{MIME_type};base64,{base64_data}
def encode_file(file_path):
    mime_type, _ = mimetypes.guess_type(file_path)
    if not mime_type or not mime_type.startswith("image/"):
        raise ValueError("Unsupported or unknown image format")
    with open(file_path, "rb") as image_file:
        encoded_string = base64.b64encode(image_file.read()).decode('utf-8')
    return f"data:{mime_type};base64,{encoded_string}"

"""
Image input methods:
The following are three image input methods.

1. Use a public URL - Suitable for publicly accessible images.
2. Use a local file - Suitable for local development and testing.
3. Use Base64 encoding - Suitable for private images or scenarios requiring encrypted transmission.
"""

# [Method 1] Use a publicly accessible image URL
# Example: Use a public image URL
img_url = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/wpimhv/rap.png"

# [Method 2] Use a local file (supports absolute and relative paths)
# Format: file:// + file path
# Example (absolute path):
# img_url = "file://" + "/path/to/your/img.png"    # Linux/macOS
# img_url = "file://" + "C:/path/to/your/img.png"  # Windows
# Example (relative path):
# img_url = "file://" + "./img.png"                # Path relative to the current execution file

# [Method 3] Use a Base64-encoded image
# img_url = encode_file("./img.png")

# Set the audio URL
audio_url = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/ozwpvi/rap.mp3"

def sample_call_i2v():
    # Synchronous call, returns the result directly
    print('please wait...')
    rsp = VideoSynthesis.call(api_key=api_key,
                              model='wan2.5-i2v-preview',
                              prompt='A scene of urban fantasy art. A dynamic graffiti art character. A boy painted with spray paint comes to life from a concrete wall. He sings an English rap song at a very fast pace while striking a classic, energetic rapper pose. The scene is set under an urban railway bridge at night. The lighting comes from a single streetlight, creating a cinematic atmosphere full of high energy and amazing detail. The audio of the video consists entirely of his rap, with no other dialogue or noise.',
                              img_url=img_url,
                              audio_url=audio_url,
                              resolution="480P",
                              duration=10,
                              # audio=True,
                              prompt_extend=True,
                              watermark=False,
                              negative_prompt="",
                              seed=12345)
    print(rsp)
    if rsp.status_code == HTTPStatus.OK:
        print("video_url:", rsp.output.video_url)
    else:
        print('Failed, status_code: %s, code: %s, message: %s' %
              (rsp.status_code, rsp.code, rsp.message))


if __name__ == '__main__':
    sample_call_i2v()

Response example

The video_url is valid for 24 hours. Download the video promptly.

{
    "status_code": 200,
    "request_id": "55194b9a-d281-4565-8ef6-xxxxxx",
    "code": null,
    "message": "",
    "output": {
        "task_id": "e2bb35a2-0218-4969-8c0d-xxxxxx",
        "task_status": "SUCCEEDED",
        "video_url": "https://dashscope-result-sh.oss-cn-shanghai.aliyuncs.com/xxx.mp4?Expires=xxx",
        "submit_time": "2025-10-28 13:45:48.620",
        "scheduled_time": "2025-10-28 13:45:57.378",
        "end_time": "2025-10-28 13:48:05.361",
        "orig_prompt": "A scene of urban fantasy art. A dynamic graffiti art character. A boy painted with spray paint comes to life from a concrete wall. He sings an English rap song at a very fast pace while striking a classic, energetic rapper pose. The scene is set under an urban railway bridge at night. The lighting comes from a single streetlight, creating a cinematic atmosphere full of high energy and amazing detail. The audio of the video consists entirely of his rap, with no other dialogue or noise.",
        "actual_prompt": "A boy made of spray paint emerges from a concrete wall, stands still, and begins to sing an English rap, his mouth opening and closing, his head nodding to the rhythm, and his eyes focused. He gives a thumbs-up with his right hand, puts his left hand on his hip, and moves his body rhythmically in place. The background is a night scene under a railway bridge, lit by a single streetlight. The audio is his rap performance, with the lyrics: 'Skyscrapers loom, shadows kiss the pavement. Dreams stack high, but the soul's in the basement. Pocket full of lint, chasing gold like it's sacred. Every breath a gamble, the odds never patient.'"
    },
    "usage": {
        "video_count": 1,
        "video_duration": 0,
        "video_ratio": "",
        "duration": 10,
        "SR": 480
    }
}

Request example

import os
from http import HTTPStatus
from dashscope import VideoSynthesis
import dashscope

# The following is the URL for the Singapore region. If you use a model in the Beijing region, replace the URL with: https://dashscope.aliyuncs.com/api/v1
dashscope.base_http_api_url = 'https://dashscope-intl.aliyuncs.com/api/v1'


# If you have not configured an environment variable, replace the following line with your Model Studio API key: api_key="sk-xxx"
# The API keys for the Singapore and Beijing regions are different. Get an API key: https://www.alibabacloud.com/help/en/model-studio/get-api-key
api_key = os.getenv("DASHSCOPE_API_KEY")

# Use a publicly accessible image URL
img_url = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/wpimhv/rap.png"

# Set the audio URL
audio_url = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/ozwpvi/rap.mp3"


def sample_async_call_i2v():
    # Asynchronous call, returns a task_id
    rsp = VideoSynthesis.async_call(api_key=api_key,
                                    model='wan2.5-i2v-preview',
                                    prompt='A scene of urban fantasy art. A dynamic graffiti art character. A boy painted with spray paint comes to life from a concrete wall. He sings an English rap song at a very fast pace while striking a classic, energetic rapper pose. The scene is set under an urban railway bridge at night. The lighting comes from a single streetlight, creating a cinematic atmosphere full of high energy and amazing detail. The audio of the video consists entirely of his rap, with no other dialogue or noise.',
                                    img_url=img_url,
                                    audio_url=audio_url,
                                    resolution="480P",
                                    duration=10,
                                    # audio=True,
                                    prompt_extend=True,
                                    watermark=False,
                                    negative_prompt="",
                                    seed=12345)
    print(rsp)
    if rsp.status_code == HTTPStatus.OK:
        print("task_id: %s" % rsp.output.task_id)
    else:
        print('Failed, status_code: %s, code: %s, message: %s' %
              (rsp.status_code, rsp.code, rsp.message))

    # Get asynchronous task information
    status = VideoSynthesis.fetch(task=rsp, api_key=api_key)
    if status.status_code == HTTPStatus.OK:
        print(status.output.task_status)
    else:
        print('Failed, status_code: %s, code: %s, message: %s' %
              (status.status_code, status.code, status.message))

    # Wait for the asynchronous task to finish
    rsp = VideoSynthesis.wait(task=rsp, api_key=api_key)
    print(rsp)
    if rsp.status_code == HTTPStatus.OK:
        print(rsp.output.video_url)
    else:
        print('Failed, status_code: %s, code: %s, message: %s' %
              (rsp.status_code, rsp.code, rsp.message))


if __name__ == '__main__':
    sample_async_call_i2v()

Response example

1. Response example for creating a task

{
    "status_code": 200,
    "request_id": "6dc3bf6c-be18-9268-9c27-xxxxxx",
    "code": "",
    "message": "",
    "output": {
        "task_id": "686391d9-7ecf-4290-a8e9-xxxxxx",
        "task_status": "PENDING",
        "video_url": ""
    },
    "usage": null
}

2. Response example for querying a task result

The video_url is valid for 24 hours. Download the video promptly.

{
    "status_code": 200,
    "request_id": "55194b9a-d281-4565-8ef6-xxxxxx",
    "code": null,
    "message": "",
    "output": {
        "task_id": "e2bb35a2-0218-4969-8c0d-xxxxxx",
        "task_status": "SUCCEEDED",
        "video_url": "https://dashscope-result-sh.oss-cn-shanghai.aliyuncs.com/xxx.mp4?Expires=xxx",
        "submit_time": "2025-10-28 13:45:48.620",
        "scheduled_time": "2025-10-28 13:45:57.378",
        "end_time": "2025-10-28 13:48:05.361",
        "orig_prompt": "A scene of urban fantasy art. A dynamic graffiti art character. A boy painted with spray paint comes to life from a concrete wall. He sings an English rap song at a very fast pace while striking a classic, energetic rapper pose. The scene is set under an urban railway bridge at night. The lighting comes from a single streetlight, creating a cinematic atmosphere full of high energy and amazing detail. The audio of the video consists entirely of his rap, with no other dialogue or noise.",
        "actual_prompt": "A boy made of spray paint emerges from a concrete wall, stands still, and begins to sing an English rap, his mouth opening and closing, his head nodding to the rhythm, and his eyes focused. He gives a thumbs-up with his right hand, puts his left hand on his hip, and moves his body rhythmically in place. The background is a night scene under a railway bridge, lit by a single streetlight. The audio is his rap performance, with the lyrics: 'Skyscrapers loom, shadows kiss the pavement. Dreams stack high, but the soul's in the basement. Pocket full of lint, chasing gold like it's sacred. Every breath a gamble, the odds never patient.'"
    },
    "usage": {
        "video_count": 1,
        "video_duration": 0,
        "video_ratio": "",
        "duration": 10,
        "SR": 480
    }
}

Request example

// Copyright (c) Alibaba, Inc. and its affiliates.

import com.alibaba.dashscope.aigc.videosynthesis.VideoSynthesis;
import com.alibaba.dashscope.aigc.videosynthesis.VideoSynthesisParam;
import com.alibaba.dashscope.aigc.videosynthesis.VideoSynthesisResult;
import com.alibaba.dashscope.exception.ApiException;
import com.alibaba.dashscope.exception.InputRequiredException;
import com.alibaba.dashscope.exception.NoApiKeyException;
import com.alibaba.dashscope.utils.JsonUtils;
import com.alibaba.dashscope.utils.Constants;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;

 
public class Image2Video {

    static {
        Constants.baseHttpApiUrl = "https://dashscope-intl.aliyuncs.com/api/v1";
        // The preceding is the URL for the Singapore region. If you use a model in the Beijing region, replace the URL with: https://dashscope.aliyuncs.com/api/v1
    }

    // If you have not configured an environment variable, replace the following line with your Model Studio API key: apiKey="sk-xxx"
    // The API keys for the Singapore and Beijing regions are different. Get an API key: https://www.alibabacloud.com/help/en/model-studio/get-api-key
    static String apiKey = System.getenv("DASHSCOPE_API_KEY");
    
    /**
     * Image input methods: Choose one of the following three.
     *
     * 1. Use a public URL - Suitable for publicly accessible images.
     * 2. Use a local file - Suitable for local development and testing.
     * 3. Use Base64 encoding - Suitable for private images or scenarios requiring encrypted transmission.
     */

    // [Method 1] Public URL
    static String imgUrl = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/wpimhv/rap.png";

    // [Method 2] Local file path (file:// + absolute path)
    // static String imgUrl = "file://" + "/your/path/to/img.png";    // Linux/macOS
    // static String imgUrl = "file://" + "C:/your/path/to/img.png";  // Windows

    // [Method 3] Base64 encoding
    // static String imgUrl = Image2Video.encodeFile("/your/path/to/img.png");
    
    // Set the audio URL
    static String audioUrl = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/ozwpvi/rap.mp3";

    public static void image2video() throws ApiException, NoApiKeyException, InputRequiredException {
        // Set the parameters
        Map<String, Object> parameters = new HashMap<>();
        parameters.put("prompt_extend", true);
        parameters.put("watermark", false);
        parameters.put("seed", 12345);

        VideoSynthesis vs = new VideoSynthesis();
        VideoSynthesisParam param =
                VideoSynthesisParam.builder()
                        .apiKey(apiKey)
                        .model("wan2.5-i2v-preview")
                        .prompt("A scene of urban fantasy art. A dynamic graffiti art character. A boy painted with spray paint comes to life from a concrete wall. He sings an English rap song at a very fast pace while striking a classic, energetic rapper pose. The scene is set under an urban railway bridge at night. The lighting comes from a single streetlight, creating a cinematic atmosphere full of high energy and amazing detail. The audio of the video consists entirely of his rap, with no other dialogue or noise.")
                        .imgUrl(imgUrl)
                        .audioUrl(audioUrl)
                        //.audio(true)
                        .duration(10)
                        .parameters(parameters)
                        .resolution("480P")
                        .negativePrompt("")
                        .build();
        System.out.println("please wait...");
        VideoSynthesisResult result = vs.call(param);
        System.out.println(JsonUtils.toJson(result));
    }
    
     /**
     * Encodes a file into a Base64 string.
     * @param filePath The file path.
     * @return A Base64 string in the format: data:{MIME_type};base64,{base64_data}
     */
    public static String encodeFile(String filePath) {
        Path path = Paths.get(filePath);
        if (!Files.exists(path)) {
            throw new IllegalArgumentException("File does not exist: " + filePath);
        }
        // Detect MIME type
        String mimeType = null;
        try {
            mimeType = Files.probeContentType(path);
        } catch (IOException e) {
            throw new IllegalArgumentException("Cannot detect file type: " + filePath);
        }
        if (mimeType == null || !mimeType.startsWith("image/")) {
            throw new IllegalArgumentException("Unsupported or unknown image format");
        }
        // Read file content and encode
        byte[] fileBytes = null;
        try{
            fileBytes = Files.readAllBytes(path);
        } catch (IOException e) {
            throw new IllegalArgumentException("Cannot read file content: " + filePath);
        }
    
        String encodedString = Base64.getEncoder().encodeToString(fileBytes);
        return "data:" + mimeType + ";base64," + encodedString;
    }
    

    public static void main(String[] args) {
        try {
            image2video();
        } catch (ApiException | NoApiKeyException | InputRequiredException e) {
            System.out.println(e.getMessage());
        }
        System.exit(0);
    }
}

Response example

The video_url is valid for 24 hours. Download the video promptly.

{
    "request_id": "f1bfb531-6e13-4e17-8e93-xxxxxx",
    "output": {
        "task_id": "9ddebba6-f784-4f55-b845-xxxxxx",
        "task_status": "SUCCEEDED",
        "video_url": "https://dashscope-result-sh.oss-cn-shanghai.aliyuncs.com/xxx.mp4?Expires=xxx"
    },
    "usage": {
        "video_count": 1
    }
}

Request example

// Copyright (c) Alibaba, Inc. and its affiliates.

import com.alibaba.dashscope.aigc.videosynthesis.VideoSynthesis;
import com.alibaba.dashscope.aigc.videosynthesis.VideoSynthesisListResult;
import com.alibaba.dashscope.aigc.videosynthesis.VideoSynthesisParam;
import com.alibaba.dashscope.aigc.videosynthesis.VideoSynthesisResult;
import com.alibaba.dashscope.exception.ApiException;
import com.alibaba.dashscope.exception.InputRequiredException;
import com.alibaba.dashscope.exception.NoApiKeyException;
import com.alibaba.dashscope.task.AsyncTaskListParam;
import com.alibaba.dashscope.utils.JsonUtils;
import com.alibaba.dashscope.utils.Constants;

import java.util.HashMap;
import java.util.Map;

public class Image2Video {

    static {
        // The following is the URL for the Singapore region. If you use a model in the Beijing region, replace the URL with: https://dashscope.aliyuncs.com/api/v1
        Constants.baseHttpApiUrl = "https://dashscope-intl.aliyuncs.com/api/v1";
    }

    // If you have not configured an environment variable, replace the following line with your Model Studio API key: api_key="sk-xxx"
    // The API keys for the Singapore and Beijing regions are different. Get an API key: https://www.alibabacloud.com/help/en/model-studio/get-api-key
    static String apiKey = System.getenv("DASHSCOPE_API_KEY");
    // Set the input image URL
    static String imgUrl = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/wpimhv/rap.png";

    // Set the audio URL
    static String audioUrl = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20250925/ozwpvi/rap.mp3";

    public static void image2video() throws ApiException, NoApiKeyException, InputRequiredException {
        // Set the parameters
        Map<String, Object> parameters = new HashMap<>();
        parameters.put("prompt_extend", true);
        parameters.put("watermark", false);
        parameters.put("seed", 12345);

        VideoSynthesis vs = new VideoSynthesis();
        VideoSynthesisParam param =
                VideoSynthesisParam.builder()
                        .apiKey(apiKey)
                        .model("wan2.5-i2v-preview")
                        .prompt("A scene of urban fantasy art. A dynamic graffiti art character. A boy painted with spray paint comes to life from a concrete wall. He sings an English rap song at a very fast pace while striking a classic, energetic rapper pose. The scene is set under an urban railway bridge at night. The lighting comes from a single streetlight, creating a cinematic atmosphere full of high energy and amazing detail. The audio of the video consists entirely of his rap, with no other dialogue or noise.")
                        .imgUrl(imgUrl)
                        .audioUrl(audioUrl)
                        //.audio(true)
                        .duration(10)
                        .parameters(parameters)
                        .resolution("480P")
                        .negativePrompt("")
                        .build();
        // Asynchronous call
        VideoSynthesisResult task = vs.asyncCall(param);
        System.out.println(JsonUtils.toJson(task));
        System.out.println("please wait...");

        // Get the result
        VideoSynthesisResult result = vs.wait(task, apiKey);
        System.out.println(JsonUtils.toJson(result));
    }

    // Get the task list
    public static void listTask() throws ApiException, NoApiKeyException {
        VideoSynthesis is = new VideoSynthesis();
        AsyncTaskListParam param = AsyncTaskListParam.builder().build();
        param.setApiKey(apiKey);
        VideoSynthesisListResult result = is.list(param);
        System.out.println(result);
    }

    // Get a single task result
    public static void fetchTask(String taskId) throws ApiException, NoApiKeyException {
        VideoSynthesis is = new VideoSynthesis();
        // If DASHSCOPE_API_KEY is set as an environment variable, apiKey can be null.
        VideoSynthesisResult result = is.fetch(taskId, apiKey);
        System.out.println(result.getOutput());
        System.out.println(result.getUsage());
    }

    public static void main(String[] args) {
        try {
            image2video();
        } catch (ApiException | NoApiKeyException | InputRequiredException e) {
            System.out.println(e.getMessage());
        }
        System.exit(0);
    }
}

Response example

1. Response example for creating a task

{
    "request_id": "5dbf9dc5-4f4c-9605-85ea-xxxxxxxx",
    "output": {
        "task_id": "7277e20e-aa01-4709-xxxxxxxx",
        "task_status": "PENDING"
    }
}

2. Response example for querying a task result

The video_url is valid for 24 hours. Download the video promptly.

{
    "request_id": "f1bfb531-6e13-4e17-8e93-xxxxxx",
    "output": {
        "task_id": "9ddebba6-f784-4f55-b845-xxxxxx",
        "task_status": "SUCCEEDED",
        "video_url": "https://dashscope-result-sh.oss-cn-shanghai.aliyuncs.com/xxx.mp4?Expires=xxx"
    },
    "usage": {
        "video_count": 1
    }
}