{
  "command": "initial_vscreen",
  "vlayer": [
    {
      "VID": 1010000,
      "coord": "global",
      "virtual_w": 1920, "virtual_h": 1080,
      "vsrc_x": 0, "vsrc_y": 0, "vsrc_w": 1920, "vsrc_h": 1080,
      "vdst_x": 960, "vdst_y": 0, "vdst_w": 1920, "vdst_h": 1080,
      "vsurface": [
        {
          "VID": 101000,
          "pixel_w": 1920, "pixel_h": 1080,
          "psrc_x": 0, "psrc_y": 0, "psrc_w": 1920, "psrc_h": 1080,
          "vdst_x": 0, "vdst_y": 0, "vdst_w": 1920, "vdst_h": 1080
        }
      ]
    }
  ]
}