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POST
/
v1
/
videos
/
generations
curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "videoretalk",
  "video_url": "https://example.com/speaker.mp4",
  "audio_url": "https://example.com/target-speech.wav"
}
'
{
  "created": 1775200000,
  "id": "task-unified-1775200000-xyz12345",
  "model": "videoretalk",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": false,
    "estimated_time": 90,
    "video_duration": 0
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 480,
    "user_group": "default"
  }
}

Authorizations

​
Authorization
string
header
required

##All endpoints require Bearer Token authentication##

Get your API Key:

Visit the API Key management page to obtain your API Key

Add the following header to every request:

Authorization: Bearer YOUR_API_KEY

Body

application/json
​
model
enum<string>
default:videoretalk
required

Model name

Available options:
videoretalk
Example:

"videoretalk"

​
video_url
string<uri>
required

Input video URL containing the person whose lip movements will be replaced

Requirements:

  • Publicly accessible video URL
  • Formats: MP4, MOV, and other common formats
  • The video must contain a clearly visible human face
  • Recommended duration: 2 ~ 300 seconds
Example:

"https://example.com/speaker.mp4"

​
audio_url
string<uri>
required

Target audio URL — the person in the video will lip-sync to this audio

Requirements:

  • Publicly accessible audio URL
  • Formats: WAV, MP3, M4A, and other common formats
  • Recommended to use human speech content
Example:

"https://example.com/target-speech.wav"

​
ref_image_url
string<uri>

Reference face image URL

When the video contains multiple faces, use this image to specify the target face whose lip movements should be replaced

Requirements:

  • The image should show a clear frontal view of the target person's face
  • Only required when the video contains multiple faces
Example:

"https://example.com/target-person-face.jpg"

​
video_extension
boolean
default:false

Whether to automatically extend the video to match the audio length when the audio is longer than the video

  • true: output duration = audio duration (video extended automatically)
  • false: output duration = min(video duration, audio duration)
Example:

false

​
query_face_threshold
integer
default:170

Face matching confidence threshold

  • Range: 120 ~ 200
  • Lower values match more easily (may cause false matches)
  • Higher values are stricter (may fail to match)
  • If "no matching face found" is reported, try lowering the value (e.g. 140)
  • If the wrong face is matched, try raising the value (e.g. 190)
Required range: 120 <= x <= 200
Example:

170

​
callback_url
string<uri>

HTTPS callback URL invoked when the task completes

Trigger conditions:

  • Triggered when the task is completed, failed, or cancelled
  • Sent after billing confirmation

Security restrictions:

  • HTTPS only
  • Internal IP addresses are blocked (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 behavior:

  • Timeout: 10 seconds
  • Up to 3 retries after failure (at 1s / 2s / 4s intervals)
  • Response body format matches the task query API response
  • A 2xx status code is considered success; other codes trigger a retry
Example:

"https://your-domain.com/webhooks/video-task-completed"

Response

Lip-sync video generation task created successfully

​
created
integer

Task creation timestamp

Example:

1775200000

​
id
string

Task ID

Example:

"task-unified-1775200000-xyz12345"

​
model
string

Actual model name used

Example:

"videoretalk"

​
object
enum<string>

Specific task type

Available options:
video.generation.task
​
progress
integer

Task progress percentage (0-100)

Required range: 0 <= x <= 100
Example:

0

​
status
enum<string>

Task status

StatusprogressDescription
pending0~10Waiting to be processed
processing10~80Processing
completed100Completed
failed0Failed
Available options:
pending,
processing,
completed,
failed
Example:

"pending"

​
task_info
object

Video task details

​
type
enum<string>

Task output type

Available options:
video
Example:

"video"

​
usage
object

Usage and billing information