json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "additionalProperties": false,
      "id": "http://sport-archive.com/input-schema/output/watermark#",
      "properties": {
          "input_bucket": {
              "description": "Bucket name and path where the watermark is located",
              "maxLength": 63,
              "minLength": 3,
              "pattern": "^[0-9a-zA-Z\\.\\-_]+$",
              "type": "string"
          },
          "input_file": {
              "description": "Filename of the file containing the watermark",
              "maxLength": 1024,
              "minLength": 1,
              "pattern": "^[\\w /-]+\\.[0-9a-zA-Z]+$",
              "type": "string"
          },
          "opacity": {
              "description": "Change the default watermark opacity",
              "type": "number"
          },
          "size": {
              "description": "Size of the watermark in the video result ([width]x[height])",
              "pattern": "^[0-9]+x[0-9]+$",
              "type": "string"
          },
          "x": {
              "description": "Change the watermark position. In pixels",
              "type": "number"
          },
          "y": {
              "description": "Change the watermark position. In pixels",
              "type": "number"
          }
      },
      "required": [
          "input_bucket",
          "input_file"
      ],
      "title": "CT transcode specification for watermark",
      "type": "object"
  }