PixVerse V6 Fusion / Reference-to-Video

Endpoint

POST /videos/generations

Full URL: https://modelfold.ai/v1/videos/generations

Authentication: every request must include the Authorization: Bearer <API_KEY> header.

Send model parameters directly in the JSON body. Do not wrap them in input. This request waits for generation to finish and returns data[].url; supported media models also offer async jobs, polling and callbacks. Replace example media URLs with your own publicly accessible files. See API gateway for billing and errors.

Input parameters for the generation task

Request Parameters

Body (application/json)

Parameter	Type	Required	Description
model	string	Yes	The name of the model used for the generation task. Required field. Default："pixverse-v6/reference-to-video"。 Allowed values：pixverse-v6/reference-to-video。 Example：pixverse-v6/reference-to-video。
prompt	string	Yes	Prompt required by the ModelFold gateway; at most 2000 characters. Generate prompt, cannot be empty, length is limited to 3-5000 characters. minLength: 3. maxLength: 2000. Example：A cinematic sunrise illuminates a mist-shrouded mountain lake; the camera slowly sweeps across the water's surface as a flock of birds flies overhead.。
image_references	array<object>	Yes	Fusion multi-reference image list. ref_name must be unique within the same list. You can reference the reference object in the prompt via @ref_name. minItems: 1. maxItems: 7.
image_references[].image_url	string	Yes	Reference image URL. Example：https://your-domain.com/images/reference.png。
image_references[].type	string	No	Reference image type. subject means subject, background means background. Default："subject"。 Allowed values：subject / background。 Example：subject。
image_references[].ref_name	string	No	Reference image name, maximum 30 characters. Can be referenced in the prompt using @name. minLength: 1. maxLength: 30. Example：dog。
aspect_ratio	string	Yes	Required. Output video aspect ratio. Supported in text-to-video and Fusion multi-reference image to video modes. Allowed values：16:9 / 4:3 / 1:1 / 3:4 / 9:16 / 2:3 / 3:2 / 21:9。 Example：16:9。
quality	string	Yes	Required. Output video resolution. Supports 360p, 540p, 720p, and 1080p. Allowed values：360p / 540p / 720p / 1080p。 Example：720p。
duration	integer	Yes	Required. Output video duration in seconds, 1–15. minimum: 1. maximum: 15. Example：5。
generate_audio_switch	boolean	No	Whether to generate audio synchronized with the video content. Default：false。 Example：false。
seed	integer	No	Random seed, value range is 0-2147483647. Using the same parameters and seed helps improve the reproducibility of the results. minimum: 0. maximum: 2147483647. Example：123456789。

Request Example

curl -X POST "https://modelfold.ai/v1/videos/generations" \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "pixverse-v6/reference-to-video",
  "prompt": "A cinematic sunrise illuminates a mist-shrouded mountain lake; the camera slowly sweeps across the water'\''s surface as a flock of birds flies overhead.",
  "image_references": [
    {
      "image_url": "https://your-domain.com/images/reference.png"
    }
  ],
  "aspect_ratio": "16:9",
  "quality": "720p",
  "duration": 5,
  "generate_audio_switch": false
}'

{
  "model": "pixverse-v6/reference-to-video",
  "prompt": "A cinematic sunrise illuminates a mist-shrouded mountain lake; the camera slowly sweeps across the water's surface as a flock of birds flies overhead.",
  "image_references": [
    {
      "image_url": "https://your-domain.com/images/reference.png"
    }
  ],
  "aspect_ratio": "16:9",
  "quality": "720p",
  "duration": 5,
  "generate_audio_switch": false
}

Response

200 — Generation completed. usage contains actual billing details; result URLs are illustrative.

{
  "ok": true,
  "created": 1792134000,
  "data": [
    {
      "url": "https://modelfold.ai/uploads/outputs/result.mp4"
    }
  ],
  "usage": {}
}