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

# Wan2.6 Reference Video

> - WAN2.6 (wan2.6-reference-video) model supports reference video-to-video generation
- Upload reference videos, the model will extract character appearance and voice to generate new videos
- Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail)
- Generated video links are valid for 24 hours, please save them promptly
- **Billing**: Combined billing based on input + output video duration, only charged after successful generation, no charges for failures



## OpenAPI

````yaml /en/api-manual/video-series/wan2.6/wan2.6-reference-video.json POST /v1/videos/generations
openapi: 3.1.0
info:
  title: wan2.6-reference-video API
  description: >-
    Generate videos using the WAN2.6 model with reference videos, extracting
    character appearance and voice from uploaded reference videos to create new
    videos
  license:
    name: MIT
  version: 1.0.0
servers:
  - url: https://api.evolink.ai
    description: Production Environment
security:
  - bearerAuth: []
paths:
  /v1/videos/generations:
    post:
      tags:
        - Video Generation
      summary: wan2.6-reference-video API
      description: >-
        - WAN2.6 (wan2.6-reference-video) model supports reference
        video-to-video generation

        - Upload reference videos, the model will extract character appearance
        and voice to generate new videos

        - Asynchronous processing mode, use the returned task ID to [query
        status](/en/api-manual/task-management/get-task-detail)

        - Generated video links are valid for 24 hours, please save them
        promptly

        - **Billing**: Combined billing based on input + output video duration,
        only charged after successful generation, no charges for failures
      operationId: createWan26ReferenceVideoGeneration
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Wan26ReferenceVideoRequest'
            examples:
              reference_video:
                summary: Reference Video to Video
                value:
                  model: wan2.6-reference-video
                  prompt: A person dancing
                  video_urls:
                    - >-
                      https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/xxx.mp4
      responses:
        '200':
          description: Video task created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/VideoGenerationResponse'
        '400':
          description: Invalid request parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: invalid_request
                  message: Invalid request parameters
                  type: invalid_request_error
        '401':
          description: Unauthenticated, invalid or expired token
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: unauthorized
                  message: Invalid or expired token
                  type: authentication_error
        '402':
          description: Insufficient quota, recharge required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: insufficient_quota
                  message: Insufficient quota. Please top up your account.
                  type: insufficient_quota
        '403':
          description: Access denied
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: model_access_denied
                  message: 'Token does not have access to model: wan2.6-reference-video'
                  type: invalid_request_error
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: rate_limit_exceeded
                  message: Too many requests, please try again later
                  type: rate_limit_error
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                error:
                  code: internal_error
                  message: Internal server error
                  type: api_error
components:
  schemas:
    Wan26ReferenceVideoRequest:
      type: object
      required:
        - model
        - prompt
        - video_urls
      properties:
        model:
          type: string
          description: Model name
          enum:
            - wan2.6-reference-video
          default: wan2.6-reference-video
          example: wan2.6-reference-video
        prompt:
          type: string
          description: >-
            Prompt describing the video you want to generate, limited to 1500
            characters
          example: A person dancing
          maxLength: 1500
        video_urls:
          type: array
          items:
            type: string
            format: uri
          description: >-
            Array of reference video file URLs. Used to extract character
            appearance and voice from reference videos to generate new videos.


            **URL Requirements:**

            - Supports HTTP or HTTPS protocol

            - Local files can obtain temporary URLs via [File
            Upload](/en/api-manual/file-series/upload-base64)


            **Array Limits:**

            - Maximum 3 videos


            **Video Requirements:**

            - Format: mp4, mov

            - Duration: 2~30 seconds

            - File size: Single video no more than 100MB


            **Input Video Billing Rules:**

            - Each reference video is truncated and summed, total input billing
            duration capped at `5` seconds

            - 1 video: `min(video duration, 5s)`

            - 2 videos: `min(video1 duration, 2.5s) + min(video2 duration,
            2.5s)`

            - 3 videos: `min(video1 duration, 1.65s) + min(video2 duration,
            1.65s) + min(video3 duration, 1.65s)`

            - `1080p` quality has a higher price
          maxItems: 3
          example:
            - >-
              https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/xxx.mp4
        aspect_ratio:
          type: string
          description: >-
            Video aspect ratio, defaults to `16:9`


            **Options:**

            - `720p`: Supports `16:9` (landscape), `9:16` (portrait), `1:1`
            (square), `4:3`, `3:4`

            - `1080p`: Supports `16:9` (landscape), `9:16` (portrait), `1:1`
            (square), `4:3`, `3:4`
          example: '16:9'
        quality:
          type: string
          description: >-
            Video quality, defaults to `720p`


            **Options:**

            - `720p`: Standard definition, standard price, this is the default

            - `1080p`: High definition, higher price


            **Note:** Different quality levels support different aspect ratios,
            see `aspect_ratio` parameter
          example: 720p
        duration:
          type: integer
          description: >-
            Specifies the duration of the generated video (in seconds)


            **Note:**

            - Supports any integer value between `2~10` seconds


            **Output Video Billing Rules:**

            - Output video billing duration: The number of seconds of video
            successfully generated by the model
          minimum: 2
          maximum: 10
          example: 5
        model_params:
          type: object
          description: Model parameter configuration
          properties:
            shot_type:
              type: string
              description: >-
                Specifies the shot type for the generated video, i.e., whether
                the video consists of a single continuous shot or multiple
                switching shots


                **Parameter Priority:**

                - `shot_type` > `prompt`

                - For example, if `shot_type` is set to `single`, even if the
                `prompt` contains `generate multi-shot video`, the model will
                still output a single-shot video


                **Options:**

                - `single`: Default, outputs single-shot video

                - `multi`: Outputs multi-shot video


                **Note:**

                - Use this parameter when you want to strictly control the
                narrative structure of the video (e.g., single shot for product
                showcases, multi-shot for short stories)
              enum:
                - single
                - multi
              example: single
        callback_url:
          type: string
          description: >-
            HTTPS callback URL for task completion


            **Callback Timing:**

            - Triggered when task is completed, failed, or cancelled

            - Sent after billing confirmation


            **Security Restrictions:**

            - Only HTTPS protocol is supported

            - Callbacks to internal IP addresses are prohibited (127.0.0.1,
            10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.)

            - URL length must not exceed `2048` characters


            **Callback Mechanism:**

            - Timeout: `10` seconds

            - Up to `3` retries after failure (retries at `1`/`2`/`4` seconds
            after failure)

            - Callback response format is consistent with the task query API
            response

            - 2xx status codes are considered successful, other status codes
            trigger retries
          format: uri
          example: https://your-domain.com/webhooks/video-task-completed
    VideoGenerationResponse:
      type: object
      properties:
        created:
          type: integer
          description: Task creation timestamp
          example: 1757169743
        id:
          type: string
          description: Task ID
          example: task-unified-1757169743-7cvnl5zw
        model:
          type: string
          description: Actual model name used
          example: wan2.6-reference-video
        object:
          type: string
          enum:
            - video.generation.task
          description: Task type
        progress:
          type: integer
          description: Task progress percentage (0-100)
          minimum: 0
          maximum: 100
          example: 0
        status:
          type: string
          description: Task status
          enum:
            - pending
            - processing
            - completed
            - failed
          example: pending
        task_info:
          $ref: '#/components/schemas/VideoTaskInfo'
          description: Video task details
        type:
          type: string
          enum:
            - text
            - image
            - audio
            - video
          description: Task output type
          example: video
        usage:
          $ref: '#/components/schemas/Usage'
          description: Usage and billing information
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              description: Error code identifier
            message:
              type: string
              description: Error description
            type:
              type: string
              description: Error type
    VideoTaskInfo:
      type: object
      properties:
        can_cancel:
          type: boolean
          description: Whether the task can be cancelled
          example: true
        estimated_time:
          type: integer
          description: Estimated completion time (seconds)
          minimum: 0
          example: 120
    Usage:
      type: object
      description: Usage and billing information
      properties:
        billing_rule:
          type: string
          description: Billing rule
          enum:
            - per_call
            - per_token
            - per_second
          example: per_call
        credits_reserved:
          type: number
          description: Estimated credits consumption
          minimum: 0
          example: 5
        user_group:
          type: string
          description: User group category
          enum:
            - default
            - vip
          example: default
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        ## All APIs require Bearer Token authentication ##


        **Get API Key:**


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


        **Add to request header:**

        ```

        Authorization: Bearer YOUR_API_KEY

        ```

````