{
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  "sourceSeconds": 4,
  "segments": [
    {
      "id": "a",
      "source": "source-a.mp4",
      "proxy": "proxy-a.mp4",
      "inFrame": 25,
      "outFrameExclusive": 100,
      "toneHz": 440
    },
    {
      "id": "b",
      "source": "source-b.mp4",
      "proxy": "proxy-b.mp4",
      "inFrame": 0,
      "outFrameExclusive": 75,
      "toneHz": 880
    }
  ]
}
