Wan 2.7 Reference to Video API

{
  "type": "object",
  "required": [
    "prompt"
  ],
  "properties": {
    "seed": {
      "type": "integer",
      "title": "Seed",
      "maximum": 2147483647,
      "minimum": 0,
      "description": "Random seed. Range: `0-2147483647`. If omitted, the system generates one automatically."
    },
    "prompt": {
      "type": "string",
      "title": "Prompt",
      "maxLength": 5000,
      "description": "Text prompt. Required. Describes the desired elements and visual features in the generated video. Supports Chinese and English. Maximum length: 5000 characters."
    },
    "duration": {
      "type": "integer",
      "title": "Duration",
      "default": 5,
      "maximum": 10,
      "minimum": 2,
      "description": "Output video duration in seconds. Valid range is an integer from `2` to `10`. Default value: `5`."
    },
    "watermark": {
      "type": "boolean",
      "title": "Watermark",
      "default": false,
      "description": "Whether to add a watermark. The watermark is placed in the lower-right corner of the video with the fixed text \"AI generated\"."
    },
    "resolution": {
      "enum": [
        "720p",
        "1080p"
      ],
      "type": "string",
      "title": "Resolution",
      "default": "1080p",
      "description": "Output video resolution tier. Available values: `720p`, `1080p`. Default value: `1080p`."
    },
    "first_frame": {
      "type": "string",
      "title": "First frame",
      "format": "uri",
      "x-media": "image",
      "description": "First frame image URL. At most one image can be provided. If supplied, `aspect_ratio` is ignored and the output uses a ratio close to the first frame image."
    },
    "aspect_ratio": {
      "enum": [
        "16:9",
        "9:16",
        "1:1",
        "4:3",
        "3:4"
      ],
      "type": "string",
      "title": "Aspect ratio",
      "default": "16:9",
      "description": "Output video aspect ratio. Effective logic: If `first_frame` is not provided: the video is generated using the specified `aspect_ratio` If `first_frame` is provided: `aspect_ratio` is ignored and the output uses a ratio close to the first frame image"
    },
    "nsfw_checker": {
      "type": "boolean",
      "title": "NSFW checker",
      "description": "Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model."
    },
    "prompt_extend": {
      "type": "boolean",
      "title": "Prompt extend",
      "default": true,
      "description": "Whether to enable prompt rewriting. When enabled, the model expands the input prompt. This usually works better for short prompts but increases processing time."
    },
    "negative_prompt": {
      "type": "string",
      "title": "Negative prompt",
      "maxLength": 500,
      "description": "Optional negative prompt describing what should not appear in the video. Supports Chinese and English. Maximum length: 500 characters."
    },
    "reference_image": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri"
      },
      "title": "Reference image",
      "x-media": "image",
      "maxItems": 5,
      "description": "Array of reference image URLs. At least one of `reference_image` or `reference_video` must be provided. The total number of images and videos cannot exceed 5."
    },
    "reference_video": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri"
      },
      "title": "Reference video",
      "x-media": "video",
      "maxItems": 5,
      "description": "Array of reference video URLs. At least one of `reference_image` or `reference_video` must be provided. The total number of images and videos cannot exceed 5."
    },
    "reference_voice": {
      "type": "string",
      "title": "Reference voice",
      "format": "uri",
      "x-media": "audio",
      "description": "Audio URL used to specify the voice timbre of the subject in the reference material. Rules: If `reference_video` contains audio and `reference_voice` is not provided, the original video audio is used by default If both `reference_video` and `reference_voice` are provided, `reference_voice` takes priority Audio limits: Formats: `wav`, `mp3` Duration: `1` to `10` seconds File size: up to `15MB`"
    }
  }
}