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POST
/
api
/
generate
/
submit
curl --request POST \
  --url https://api.vidgo.ai/api/generate/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "upload-and-extend-audio",
  "callback_url": "https://your-domain.com/callback",
  "input": {
    "upload_url": "https://storage.example.com/audio.mp3",
    "default_param_flag": true,
    "instrumental": true,
    "continue_at": 60,
    "mv": "V5"
  }
}
'
{
  "code": 200,
  "data": {
    "task_id": "task-unified-1757165031-uyujaw3d",
    "status": "not_started",
    "created_time": "2025-11-12T10:30:00"
  }
}
  1. After submission, a task_id will be returned. If you provided a callback_url, when the task status becomes finished or failed, a POST request will be sent to the callback_url.
  2. Regardless of whether callback_url is provided, you can retrieve the response result through the unified Query Music Detail endpoint.

​
Usage Guide

  • This endpoint extends uploaded audio files while preserving the original style
  • Upload an existing audio track and specify where to continue from
  • The AI generates additional content that seamlessly blends with the original
  • Uploaded audio files must not exceed 8 minutes in length (Note: For V4_5ALL model, max 1 minute)

​
Parameter Details

  • When default_param_flag: true (Custom Parameters Mode):
    • Full control over style, title, and other parameters
    • If instrumental: true: only style, title, and upload_url are required
    • If instrumental: false: style, title, prompt (used as exact lyrics), and upload_url are required
    • Character limits vary by model:
      • V4: prompt 3000 characters, style 200 characters, title 80 characters
      • V4_5 & V4_5PLUS: prompt 5000 characters, style 1000 characters, title 100 characters
      • V4_5ALL: prompt 5000 characters, style 1000 characters, title 80 characters
      • V5: prompt 5000 characters, style 1000 characters, title 100 characters
  • When default_param_flag: false:
    • Only upload_url is required. If instrumental: false, lyrics will be automatically generated

​
Developer Notes

  • Recommendation: Use default_param_flag: false for quick extensions that maintain the original style
  • The continue_at parameter determines where the extension begins - set it to the point where you want new content to start

​
Optional parameters

  • prompt (string): Description or lyrics for the extended audio. Required when default_param_flag is true and instrumental is false. The prompt will be used strictly as lyrics. When default_param_flag is false, lyrics will be automatically generated based on the prompt.
  • style (string): Music style specification. Required when default_param_flag is true.
  • title (string): Track title for the extended audio. Character limits vary by model (V4: 80, V4_5 & V4_5PLUS & V5: 100, V4_5ALL: 80).
  • negative_tags (string): Music styles to exclude from generation.
  • vocal_gender (string): Vocal gender preference. Use m for male, f for female. Note: This parameter can only increase the probability but cannot guarantee the specified gender.
  • style_weight (number): Strength of adherence to style. Range 0-1, up to 2 decimals.
  • weirdness_constraint (number): Controls creative deviation. Range 0-1, up to 2 decimals.
  • audio_weight (number): Balance weight for audio features. Range 0-1, up to 2 decimals.
  • persona_id (string): Persona ID to apply to the generated music. How to generate persona_id, visit generate-persona.

Authorizations

​
Authorization
string
header
required

All API endpoints require Bearer Token authentication

Get your API Key:

Visit the API Key Management Page to get your API Key

Add it to the request header:

Authorization: Bearer VIDGO_API_KEY

Body

application/json
​
model
enum<string>
required

API model identifier.

Must be upload-and-extend-audio for this endpoint.

Available options:
upload-and-extend-audio
Example:

"upload-and-extend-audio"

​
input
object
required

Input parameters for audio extension

​
callback_url
string<uri>

Webhook callback URL for result notifications

Example:

"https://your-domain.com/callback"

Response

200 - application/json

Task submitted successfully

​
code
integer
required

HTTP status code

Example:

200

​
data
object
required