{
  "version": 1,
  "day": "2026-08-22",
  "count": 16,
  "headcodes": [
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    "4L47",
    "6C02",
    "0Z86",
    "6D31",
    "6L83",
    "4M01",
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    "6S29",
    "6M03",
    "4M56",
    "0Z37",
    "6E10",
    "4B56",
    "6M35",
    "6E17"
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      "locos": [],
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      "file": "6M26_Swinton.mp4",
      "start": 0.0,
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      "file": "4L47_Barking.mp4",
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      "source_duration": 14.12
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      "locos": [
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      "file": "6C02_Wigan.mp4",
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      "source_duration": 16.334448
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    {
      "key": "0Z86_Watford",
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      ],
      "location": "Watford",
      "file": "0Z86_Watford.mp4",
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      "source_duration": 4.52
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      "file": "4M01_Watford.mp4",
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    {
      "key": "6C47_Newbury",
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      "file": "6C47_Newbury.mp4",
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      "key": "6S29_York_North",
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      "file": "6S29_York_North.mp4",
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      "key": "6M03_Thankerton",
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      "location": "Thankerton",
      "file": "6M03_Thankerton.mp4",
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      "source_duration": 17.216459
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      "key": "4M56_Swinton",
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      "key": "0Z37_Preston",
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        "37421"
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      "location": "Preston",
      "file": "0Z37_Preston.mp4",
      "start": 0.0,
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      "key": "6E10_Doncaster",
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      "location": "Doncaster",
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      "key": "4B56_Severn_Tunnel",
      "headcode": "4B56",
      "locos": [
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      ],
      "location": "Severn Tunnel",
      "file": "4B56_Severn_Tunnel.mp4",
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    {
      "key": "6M35_Beattock",
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      "location": "Beattock",
      "file": "6M35_Beattock.mp4",
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      "source_duration": 28.5
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    {
      "key": "6E17_Doncaster",
      "headcode": "6E17",
      "locos": [
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      "location": "Doncaster",
      "file": "6E17_Doncaster.webm",
      "start": 0.0,
      "snip": 11.0625,
      "source_duration": null
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  "built_at": "2026-08-22T20:00:42+00:00",
  "length_mode": "adaptive",
  "target_seconds": 180.0,
  "snip_seconds": 11.0625,
  "start_seconds": 0.0,
  "video": "freight.mp4",
  "url": "/captures/2026-08-22/roundup/freight.mp4"
}