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

# SkyReels Lip Sync

> **[Core Function]** SkyReels Lip Sync (retalking) re-drives a talking video so the subject's lips match a given audio track. **[Strengths]** Accurate lip re-synchronization on an existing talking-head video. **[Best For]** Dubbing, re-voicing talking-head video, and localizing spoken video. **[Limitations]** Do NOT use this to generate new motion or content from scratch; it only re-times lips on an existing video. Requires video_url and audio_url. Output resolution is fixed at 720p. **[Routing]** Provide the source video_url and the target audio_url; optionally provide reference_char_url to guide the driven face.



## OpenAPI

````yaml /model-api/skywork/skyreels-v2v.json post /skywork/sky-lipsync
openapi: 3.1.0
info:
  description: >-
    The video-to-video models API from SkyReels (Skywork). Includes Omni
    reference-driven video generation/editing, style transfer, single-shot and
    shot-switching extension, and lip sync. Tasks are asynchronous: submit, then
    poll the task endpoint for the result.
  version: 1.0.0
  contact:
    name: Modellix Support
    email: support@modellix.ai
  title: SkyReels Video-to-Video Models API
servers:
  - url: https://api.modellix.ai/api/v1
    description: The video-to-video models API from SkyReels (Skywork).
security:
  - bearerAuth: []
paths:
  /skywork/sky-lipsync:
    post:
      summary: SkyReels Lip Sync
      description: >-
        **[Core Function]** SkyReels Lip Sync (retalking) re-drives a talking
        video so the subject's lips match a given audio track. **[Strengths]**
        Accurate lip re-synchronization on an existing talking-head video.
        **[Best For]** Dubbing, re-voicing talking-head video, and localizing
        spoken video. **[Limitations]** Do NOT use this to generate new motion
        or content from scratch; it only re-times lips on an existing video.
        Requires video_url and audio_url. Output resolution is fixed at 720p.
        **[Routing]** Provide the source video_url and the target audio_url;
        optionally provide reference_char_url to guide the driven face.
      operationId: skyLipSyncAsync
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/LipSyncRequest'
            examples:
              basic:
                summary: Video + audio
                value:
                  video_url: https://example.com/video.mp4
                  audio_url: https://example.com/audio.wav
      responses:
        '200':
          description: Task submitted successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AsyncTaskResponse'
              example:
                code: 0
                message: success
                data:
                  status: pending
                  task_id: task-skyreels-lipsync-001
                  model_id: skyreels/sky-lipsync
                  get_result:
                    method: GET
                    url: >-
                      https://api.modellix.ai/api/v1/tasks/task-skyreels-lipsync-001
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/InternalServerError'
components:
  schemas:
    LipSyncRequest:
      type: object
      required:
        - video_url
        - audio_url
      description: SkyReels lip-sync (retalking) request. Output is fixed at 720p.
      properties:
        video_url:
          type: string
          minLength: 1
          description: Source talking video URL.
          example: https://example.com/video.mp4
        audio_url:
          type: string
          minLength: 1
          description: Target audio URL to sync lips to.
          example: https://example.com/audio.wav
        reference_char_url:
          type: string
          description: Optional reference character image URL to guide the driven face.
          example: https://example.com/face.png
    AsyncTaskResponse:
      type: object
      required:
        - code
        - message
        - data
      properties:
        code:
          type: integer
          description: Response code, 0 indicates success
          example: 0
        message:
          type: string
          description: Response message
          example: success
        data:
          type: object
          required:
            - status
            - task_id
            - model_id
          properties:
            status:
              type: string
              enum:
                - pending
                - processing
              description: Task status
              example: pending
            task_id:
              type: string
              description: Unique task identifier for polling
              example: task-abc123
            model_id:
              type: string
              description: Model ID in `provider/model` format
              example: skyreels/skyreels-omni
            get_result:
              type: object
              description: API information to query the task result
              properties:
                method:
                  type: string
                  example: GET
                url:
                  type: string
                  example: https://api.modellix.ai/api/v1/tasks/task-abc123
          description: Detailed data about the submitted asynchronous task.
    ErrorResponse:
      type: object
      required:
        - code
        - message
      properties:
        code:
          type: integer
          example: 400
        message:
          type: string
          example: 'Invalid parameters: parameter ''prompt'' is required'
  responses:
    BadRequest:
      description: Invalid request parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 400
            message: 'Invalid parameters: parameter ''prompt'' is required'
    Unauthorized:
      description: Unauthorized - Invalid or missing API Key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 401
            message: 'Authentication failed: invalid API key'
    TooManyRequests:
      description: Too many requests - Rate limit exceeded
      headers:
        X-RateLimit-Limit:
          description: Maximum requests per minute
          schema:
            type: integer
            example: 100
        X-RateLimit-Remaining:
          description: Remaining quota in current window
          schema:
            type: integer
            example: 0
        X-RateLimit-Reset:
          description: Rate limit window reset time (Unix timestamp)
          schema:
            type: integer
            example: 1704067260
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 429
            message: >-
              Rate limit exceeded: 100 requests per minute, retry after 60
              seconds
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            code: 500
            message: Internal server error
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'API Key authentication. Format: `Bearer YOUR_API_KEY`.'

````