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   "inputs": [],
   "outputs": [],
   "flags": {},
   "mode": 0,
   "properties": {},
   "size": [
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   "color": "#432",
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   "pos": [
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   "title": "How to use this workflow",
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  {
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    {
     "localized_name": "choose file to upload",
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     "widget": {
      "name": "upload"
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     "link": null
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   ],
   "outputs": [
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     "localized_name": "VIDEO",
     "name": "VIDEO",
     "type": "VIDEO",
     "links": [
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    }
   ],
   "title": "Your shot",
   "properties": {
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   "widgets_values": [
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     "name": "images",
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     "links": [
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     "localized_name": "audio",
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     "localized_name": "bit_depth",
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     "type": "COMBO",
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    },
    {
     "localized_name": "color_space",
     "name": "color_space",
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     "links": []
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   ],
   "properties": {
    "Node name for S&R": "GetVideoComponents"
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  {
   "id": 4,
   "type": "CheckpointLoaderSimple",
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   "size": [
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   "flags": {},
   "mode": 0,
   "inputs": [
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     "localized_name": "ckpt_name",
     "name": "ckpt_name",
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     "widget": {
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     "link": null
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   ],
   "outputs": [
    {
     "localized_name": "MODEL",
     "name": "MODEL",
     "type": "MODEL",
     "links": [
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    },
    {
     "localized_name": "CLIP",
     "name": "CLIP",
     "type": "CLIP",
     "links": []
    },
    {
     "localized_name": "VAE",
     "name": "VAE",
     "type": "VAE",
     "links": []
    }
   ],
   "title": "SAM 3.1",
   "properties": {
    "Node name for S&R": "CheckpointLoaderSimple"
   },
   "widgets_values": [
    "sam3.1_multiplex_fp16.safetensors"
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  },
  {
   "id": 6,
   "type": "ImageFromBatch",
   "pos": [
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   ],
   "size": [
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   "flags": {},
   "mode": 0,
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    {
     "name": "length",
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     "widget": {
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   "outputs": [
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     "links": [
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     ]
    }
   ],
   "properties": {
    "Node name for S&R": "ImageFromBatch"
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   "widgets_values": [
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   "title": "The first frame"
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  {
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   ],
   "size": [
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    {
     "name": "height",
     "type": "INT",
     "link": null,
     "widget": {
      "name": "height"
     }
    }
   ],
   "outputs": [
    {
     "name": "BOUNDING_BOX",
     "type": "BOUNDING_BOX",
     "links": [
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     ]
    }
   ],
   "properties": {
    "Node name for S&R": "PrimitiveBoundingBox"
   },
   "widgets_values": [
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    160,
    400,
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   ],
   "title": "Box round the person (x, y, width, height)"
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  {
   "id": 8,
   "type": "SAM3_Detect",
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   "mode": 0,
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    },
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     "widget": {
      "name": "threshold"
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    },
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     "widget": {
      "name": "refine_iterations"
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    },
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     "widget": {
      "name": "individual_masks"
     }
    },
    {
     "name": "bboxes",
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    },
    {
     "name": "positive_coords",
     "type": "STRING",
     "link": null,
     "widget": {
      "name": "positive_coords"
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    }
   ],
   "outputs": [
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     "type": "MASK",
     "links": [
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    },
    {
     "name": "bboxes",
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   "properties": {
    "Node name for S&R": "SAM3_Detect"
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    },
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     "widget": {
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    },
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     "widget": {
      "name": "detect_interval"
     }
    },
    {
     "name": "initial_mask",
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   ],
   "outputs": [
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     "name": "track_data",
     "type": "SAM3_TRACK_DATA",
     "links": [
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    }
   ],
   "properties": {
    "Node name for S&R": "SAM3_VideoTrack"
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     "name": "IMAGE",
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     "links": [
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     "widget": {
      "name": "codec"
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     "link": null
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   ],
   "outputs": [
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     "localized_name": "VIDEO",
     "name": "VIDEO",
     "type": "VIDEO",
     "links": [
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     ]
    }
   ],
   "properties": {
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   "flags": {},
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     "name": "format",
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    {
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     "links": []
    }
   ],
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   "title": "Grow 8",
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     "links": [
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   ],
   "outputs": [
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     "name": "VIDEO",
     "type": "VIDEO",
     "links": [
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   ],
   "properties": {
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     "links": []
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   ],
   "title": "tracked8.mp4 (use it in place of people8.mp4)",
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     "type": "IMAGE",
     "links": [
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   ],
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