{
    "success": true,
    "message": "ECM2 ROI images created with center_pipe only",
    "preview": "/home/envcctv/public_html/cctv/test_path20/kb202/e2t2/roi_preview.jpg",
    "masked": "/home/envcctv/public_html/cctv/test_path20/kb202/e2t2/roi_masked.jpg",
    "preview_saved": true,
    "masked_saved": true,
    "width": 1920,
    "height": 1080,
    "active_rois": [
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    ],
    "roi_debug": {
        "center_pipe": {
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            "pixels": {
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                "x2": 1036,
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                "width": 192,
                "height": 281
            }
        }
    },
    "preview_url": "https://cctv.envautomation.com/cctv/test_path20/kb202/e2t2/roi_preview.jpg?t=1789926572",
    "masked_url": "https://cctv.envautomation.com/cctv/test_path20/kb202/e2t2/roi_masked.jpg?t=1789926572",
    "prepared_at": "2026-09-21 01:49:32"
}