Image to video

Request

{
  "model": "wan-3.0",
  "mode": "image_to_video",
  "variant": "prime",
  "parameters": {
    "resolution": "1080p",
    "duration_seconds": 6,
    "ratio": "adaptive",
    "prompt_extend": true
  },
  "input": {
    "prompt": "The camera slowly pushes toward the subject",
    "first_frame": {
      "type": "https_url",
      "url": "https://cdn.example.com/first-frame.png"
    },
    "last_frame": {
      "type": "https_url",
      "url": "https://cdn.example.com/last-frame.png"
    }
  }
}

Frame rules

• first_frame is required and accepts an HTTPS URL or a ready image media_asset.
• last_frame is optional and uses the same locator shape.
• input.prompt is optional for image-to-video.
• Do not mix first_frame/last_frame with a references array.

URL lifetime

An HTTPS URL must be reachable without embedded credentials and remain available until provider processing completes. Alibaba fetches caller-hosted media directly in the closed alpha. To avoid depending on the source URL after isolated uploads are enabled for your project, upload once and pass the resulting media_asset_id.