{
  "anmf": [
    {
      "x": 0,
      "y": 0,
      "width": 64,
      "height": 48,
      "duration_ms": 1,
      "flags": 2
    },
    {
      "x": 0,
      "y": 0,
      "width": 64,
      "height": 48,
      "duration_ms": 10,
      "flags": 0
    },
    {
      "x": 0,
      "y": 0,
      "width": 64,
      "height": 48,
      "duration_ms": 120,
      "flags": 0
    }
  ],
  "decoded": [
    {
      "index": 0,
      "size": [
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      ],
      "duration_ms": 1,
      "pixel_15_15": [
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        0,
        255
      ],
      "pixel_45_5": [
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    {
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      "size": [
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      ],
      "duration_ms": 10,
      "pixel_15_15": [
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      ],
      "pixel_45_5": [
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      "rgba_sha256": "7a769d650d837aab5ca0f63e0873ad18ac12c9efab883615b9f7ce536b848b59"
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  ],
  "playback_minimum_duration": "实现相关，未测"
}