{
  "body": {
    "input": {
      "media": {
        "description": "媒体素材数组。参考图像和参考视频至少传入1个，合计不超过5个。首帧图像最多1张",
        "items": {
          "properties": {
            "reference_voice": {
              "description": "音频URL，用于指定参考素材中主体角色的音色。与reference_image或reference_video搭配使用。格式WAV/MP3，时长1-10s，≤15MB",
              "required": false,
              "type": "string"
            },
            "type": {
              "description": "reference_image=参考图像, reference_video=参考视频, first_frame=首帧图像",
              "enum": ["reference_image", "reference_video", "first_frame"],
              "type": "string"
            },
            "url": {
              "description": "媒体素材URL。支持公网HTTP/HTTPS、OSS临时URL、Base64编码",
              "required": true,
              "type": "string"
            }
          },
          "type": "object"
        },
        "max_items": 5,
        "min_items": 1,
        "required": true,
        "type": "array"
      },
      "negative_prompt": {
        "description": "反向提示词，用来描述不希望在视频画面中出现的内容",
        "max_chars": 500,
        "required": false,
        "type": "string"
      },
      "prompt": {
        "description": "文本提示词。支持中英文，每个汉字/字母/标点占一个字符，超过部分自动截断。参考图片时通过'图1、图2'指代，参考视频时通过'视频1、视频2'指代。顺序与media数组顺序一致。图和视频分别计数",
        "max_chars": 5000,
        "required": true,
        "type": "string"
      }
    },
    "parameters": {
      "duration": {
        "default": 5,
        "description": "生成视频时长（秒）。含视频参考时2-10秒，不含视频参考时2-15秒",
        "max": 15,
        "min": 2,
        "required": false,
        "type": "integer"
      },
      "prompt_extend": {
        "default": true,
        "description": "是否开启prompt智能改写。开启后对prompt进行改写，对较短prompt效果提升明显",
        "required": false,
        "type": "boolean"
      },
      "ratio": {
        "default": "16:9",
        "description": "生成视频的宽高比。传入首帧图像时自动忽略，以首帧宽高比为准",
        "enum": ["16:9", "9:16", "1:1", "4:3", "3:4"],
        "required": false,
        "type": "string"
      },
      "resolution": {
        "default": "1080P",
        "description": "生成视频的分辨率档位，用于控制清晰度。直接影响费用",
        "enum": ["720P", "1080P"],
        "required": false,
        "type": "string"
      },
      "seed": {
        "description": "随机数种子。固定seed可提升生成结果的可复现性",
        "max": 2147483647,
        "min": 0,
        "required": false,
        "type": "integer"
      },
      "watermark": {
        "default": false,
        "description": "是否添加水印标识，位于视频右下角，文案固定为'AI生成'",
        "required": false,
        "type": "boolean"
      }
    }
  },
  "headers": {
    "Content-Type": {
      "default": "application/json",
      "description": "请求内容类型",
      "required": true,
      "type": "string"
    },
    "X-DashScope-Async": {
      "default": "enable",
      "description": "异步任务提交标识",
      "required": true,
      "type": "string"
    }
  }
}