curl --request POST \
  --url https://api.modellix.ai/api/v1/vidu/lip-sync \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "video_url": "https://example.com/presenter-video.mp4"
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-vidu-lsync-001",
    "model_id": "vidu/lip-sync",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-vidu-lsync-001"
    }
  }
}

{
  "code": 400,
  "message": "Invalid parameters: parameter 'reference_images' is required"
}

{
  "code": 401,
  "message": "Authentication failed: invalid API key"
}

{
  "code": 429,
  "message": "Rate limit exceeded: 100 requests per minute, retry after 60 seconds"
}

{
  "code": 500,
  "message": "Internal server error"
}

Vidu Lip Sync

[Core Function] Vidu Lip Sync is a video-to-video audio synchronization model. [Strengths] It excels at reanimating lip movements in an existing video to precisely match a new replacement audio track, while preserving the original face identity. [Best For] Highly recommended for: dubbing videos into different languages, correcting spoken dialogue post-production, and creating realistic digital avatars. [Limitations] Do NOT use this model if you need to change body movements or generate a new video from scratch. It requires a pre-existing video and a clear audio track. [Routing] Use this model specifically when the user wants to change what a person in a video is saying. If the user wants to transfer body movements, use Vidu Motion Sync instead.

POST

vidu

lip-sync

curl --request POST \
  --url https://api.modellix.ai/api/v1/vidu/lip-sync \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "video_url": "https://example.com/presenter-video.mp4"
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-vidu-lsync-001",
    "model_id": "vidu/lip-sync",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-vidu-lsync-001"
    }
  }
}

{
  "code": 400,
  "message": "Invalid parameters: parameter 'reference_images' is required"
}

{
  "code": 401,
  "message": "Authentication failed: invalid API key"
}

{
  "code": 429,
  "message": "Rate limit exceeded: 100 requests per minute, retry after 60 seconds"
}

{
  "code": 500,
  "message": "Internal server error"
}

Authorizations

Authorization

string

header

required

API Key authentication. Format: Bearer YOUR_API_KEY.

Body

application/json

Vidu lip sync request. Synchronizes lip movements in the source video to match the provided audio track.

video_url

string

required

Source video URL containing the face to reanimate.

Minimum string length: 1

Example:

"https://example.com/talking-head.mp4"

audio_url

string

Replacement audio track URL. The model will reanimate the speaker's lips to match this audio.

Minimum string length: 1

Example:

"https://example.com/new-voiceover.mp3"

reference_face_image_url

string

Reference face image URL. When provided, the model uses this face to preserve identity consistency throughout the video.

Minimum string length: 1

Example:

"https://example.com/face-reference.jpg"

Response

Task submitted successfully

code

integer

required

Response code, 0 indicates success

Example:

0

message

string

required

Response message

Example:

"success"

data

object

required

Detailed data about the submitted asynchronous task.

Show child attributes

Sky lipsync Motion sync

Model API

Common API

File API

Vidu Lip Sync

Authorizations

Body

Response