Server Push 0.2

camera_stream.py

@@ -13,18 +13,19 @@ load_dotenv(override=True)
 
 app = Flask(__name__)
 
-# Load-time debug for camera config (safe to leave; only prints on startup)
-print(
-    "[Surveillance] camera_ip_1=" + str(os.getenv("camera_ip_1")) +
-    " camera_ip_2=" + str(os.getenv("camera_ip_2"))
-)
-
 # ---------------------------------------------------------------------------
 # Configuration
 # ---------------------------------------------------------------------------
 USERNAME = os.getenv("username")
 PASSWORD = os.getenv("password")
-CAMERA_IPS = [os.getenv(f"camera_ip_{i}") for i in range(1, 3)]
+
+# Dynamically find all camera_ip_N variables in environment
+CAMERA_IPS = []
+for i in range(1, 11):  # Supports up to 10 cameras
+    ip = os.getenv(f"camera_ip_{i}")
+    if ip and ip.strip():
+        CAMERA_IPS.append(ip.strip())
+
 CAMERAS = [
     {
         "id": f"cam{i + 1}",
@@ -34,7 +35,6 @@ CAMERAS = [
     }
     for i, ip in enumerate(CAMERA_IPS)
 ]
-DEFAULT_CAMERA_ID = CAMERAS[0]["id"] if CAMERAS else "cam1"
 
 PROXIMITY_PX = 200        # max pixel distance to consider two people "together"
 GROUP_TIME_THRESHOLD = 20  # seconds before an alert fires
@@ -44,470 +44,237 @@ YOLO_CONF = 0.25
 INFERENCE_DEVICE = 0
 
 # ---------------------------------------------------------------------------
-# Shared state (protected by lock)
+# Shared state
 # ---------------------------------------------------------------------------
 lock = threading.Lock()
 state = {
+    "cameras": {},  # camera_id -> dict with frame, metadata, status
+    "grid_frame": None,
+    "alerts": [],
+    "total_people_count": 0,
+    "alert_active": False
+}
+
+# Initialize camera states
+for cam in CAMERAS:
+    state["cameras"][cam["id"]] = {
         "frame": None,
         "people_count": 0,
         "groups": [],
         "alert_active": False,
-    "alerts": [],
         "fps": 0,
-    "stream_status": "connecting",
+        "status": "connecting",
-    "selected_camera_id": DEFAULT_CAMERA_ID,
+        "name": cam["name"]
-    "active_camera_id": DEFAULT_CAMERA_ID,
+    }
-}
 
 # ---------------------------------------------------------------------------
-# YOLO model (downloaded on first run)
+# YOLO model
 # ---------------------------------------------------------------------------
 if not torch.cuda.is_available():
-    raise RuntimeError(
+    print("[WARNING] CUDA not detected. Using CPU (this will be slow!).")
-        "CUDA GPU is required but not available. Install a CUDA-enabled PyTorch build "
+    device = "cpu"
-        "and verify NVIDIA drivers."
+else:
-    )
+    device = f"cuda:{INFERENCE_DEVICE}"
+
 model = YOLO("person_detector_best.pt")
-model.to(f"cuda:{INFERENCE_DEVICE}")
+model.to(device)
-
-# Group tracking
-_group_trackers: dict = {}
-_next_group_id = 0
-_last_alert_time = 0.0
-
 
 # ---------------------------------------------------------------------------
-# Detection helpers
+# Detection Helpers
 # ---------------------------------------------------------------------------
-
 def _centroids(boxes):
-    """Return list of (cx, cy) from xyxy boxes."""
     return [((b[0] + b[2]) / 2, (b[1] + b[3]) / 2) for b in boxes]
 
-
 def _find_groups(centroids, threshold):
-    """BFS clustering — returns list of index-lists with >= MIN_GROUP_SIZE."""
     n = len(centroids)
-    if n < MIN_GROUP_SIZE:
+    if n < MIN_GROUP_SIZE: return []
-        return []
-
     visited = set()
     groups = []
-
     for i in range(n):
-        if i in visited:
+        if i in visited: continue
-            continue
+        cluster, queue = [i], [i]
-        cluster = [i]
         visited.add(i)
-        queue = [i]
         while queue:
             cur = queue.pop(0)
             for j in range(n):
-                if j in visited:
+                if j in visited: continue
-                    continue
+                dx, dy = centroids[cur][0] - centroids[j][0], centroids[cur][1] - centroids[j][1]
-                dx = centroids[cur][0] - centroids[j][0]
+                if (dx*dx + dy*dy)**0.5 < threshold:
-                dy = centroids[cur][1] - centroids[j][1]
+                    cluster.append(j); visited.add(j); queue.append(j)
-                if (dx * dx + dy * dy) ** 0.5 < threshold:
+        if len(cluster) >= MIN_GROUP_SIZE: groups.append(cluster)
-                    cluster.append(j)
-                    visited.add(j)
-                    queue.append(j)
-        if len(cluster) >= MIN_GROUP_SIZE:
-            groups.append(cluster)
-
     return groups
 
-
 def _group_centroid(centroids, indices):
     xs = [centroids[i][0] for i in indices]
     ys = [centroids[i][1] for i in indices]
     return (sum(xs) / len(xs), sum(ys) / len(ys))
 
-
-def _get_camera_by_id(camera_id):
-    for cam in CAMERAS:
-        if cam["id"] == camera_id:
-            return cam
-    return CAMERAS[0] if CAMERAS else None
-
-
-def _reset_tracking():
-    global _group_trackers, _next_group_id, _last_alert_time
-    _group_trackers = {}
-    _next_group_id = 0
-    _last_alert_time = 0.0
-
-
 # ---------------------------------------------------------------------------
-# Main processing loop (runs in background thread)
+# Stream Processing (One per camera)
 # ---------------------------------------------------------------------------
-
+def _process_stream(camera):
-def _process_stream():
+    cam_id = camera["id"]
-    global _next_group_id, _last_alert_time
+    rtsp_url = camera["rtsp_url"]
+    group_trackers = {}
+    next_group_id = 0
+    last_alert_time = 0.0
     cap = None
-    active_camera_id = None
     prev_time = time.time()
 
-    while True:
+    print(f"[Surveillance] Starting thread for {camera['name']}")
-        with lock:
-            selected_camera_id = state["selected_camera_id"]
-        selected_camera = _get_camera_by_id(selected_camera_id)
-        if not selected_camera:
-            with lock:
-                state["stream_status"] = "error"
-            time.sleep(2)
-            continue
 
-        if cap is None or active_camera_id != selected_camera["id"]:
+    while True:
-            if cap is not None:
+        if cap is None:
-                cap.release()
+            cap = cv2.VideoCapture(rtsp_url)
-            cap = cv2.VideoCapture(selected_camera["rtsp_url"])
-            active_camera_id = selected_camera["id"]
-            _reset_tracking()
-            with lock:
-                state["active_camera_id"] = active_camera_id
             if not cap.isOpened():
-                with lock:
+                with lock: state["cameras"][cam_id]["status"] = "error"
-                    state["stream_status"] = "error"
+                time.sleep(5); cap = None; continue
-                print(f"[ERROR] Cannot open RTSP stream: {selected_camera['rtsp_url']}")
+            with lock: state["cameras"][cam_id]["status"] = "live"
-                time.sleep(2)
-                cap = None
-                continue
-            with lock:
-                state["stream_status"] = "live"
 
         ret, frame = cap.read()
         if not ret:
-            with lock:
+            with lock: state["cameras"][cam_id]["status"] = "reconnecting"
-                state["stream_status"] = "reconnecting"
+            cap.release(); time.sleep(2); cap = cv2.VideoCapture(rtsp_url); continue
-            cap.release()
-            time.sleep(2)
-            cap = cv2.VideoCapture(selected_camera["rtsp_url"])
-            if not cap.isOpened():
-                with lock:
-                    state["stream_status"] = "error"
-                cap = None
-            else:
-                with lock:
-                    state["stream_status"] = "live"
-            continue
 
         now = time.time()
         fps = 1.0 / max(now - prev_time, 1e-6)
         prev_time = now
 
-        # --- YOLO inference (person = class 0) ---
+        results = model(frame, classes=[0], verbose=False, conf=YOLO_CONF, device=device)
-        results = model(
-            frame,
-            classes=[0],
-            verbose=False,
-            conf=YOLO_CONF,
-            device=INFERENCE_DEVICE,
-        )
-
         person_boxes = []
         for r in results:
             for box in r.boxes:
                 x1, y1, x2, y2 = box.xyxy[0].cpu().numpy()
-                conf = float(box.conf[0])
+                person_boxes.append((float(x1), float(y1), float(x2), float(y2), float(box.conf[0])))
-                person_boxes.append((float(x1), float(y1), float(x2), float(y2), conf))
 
         centroids = _centroids([(b[0], b[1], b[2], b[3]) for b in person_boxes])
         current_groups = _find_groups(centroids, PROXIMITY_PX)
 
-        # --- Match current groups to tracked groups ---
+        # Match Groups
-        matched_ids: set = set()
+        matched_ids = set()
         frame_group_data = []
-
         for grp_indices in current_groups:
             gc = _group_centroid(centroids, grp_indices)
-
             best_id, best_dist = None, float("inf")
-            for gid, gdata in _group_trackers.items():
+            for gid, gdata in group_trackers.items():
-                if gid in matched_ids:
+                if gid in matched_ids: continue
-                    continue
+                dist = ((gc[0]-gdata["centroid"][0])**2 + (gc[1]-gdata["centroid"][1])**2)**0.5
-                dx = gc[0] - gdata["centroid"][0]
-                dy = gc[1] - gdata["centroid"][1]
-                dist = (dx * dx + dy * dy) ** 0.5
                 if dist < PROXIMITY_PX * 2 and dist < best_dist:
-                    best_dist = dist
+                    best_dist, best_id = dist, gid
-                    best_id = gid
             
             if best_id is not None:
-                _group_trackers[best_id]["centroid"] = gc
+                group_trackers[best_id].update({"centroid": gc, "last_seen": now, "member_count": len(grp_indices)})
-                _group_trackers[best_id]["last_seen"] = now
-                _group_trackers[best_id]["member_count"] = len(grp_indices)
                 matched_ids.add(best_id)
                 frame_group_data.append((best_id, grp_indices, gc))
             else:
-                gid = _next_group_id
+                gid = next_group_id
-                _next_group_id += 1
+                next_group_id += 1
-                _group_trackers[gid] = {
+                group_trackers[gid] = {"centroid": gc, "first_seen": now, "last_seen": now, "member_count": len(grp_indices), "alerted": False}
-                    "centroid": gc,
-                    "first_seen": now,
-                    "last_seen": now,
-                    "member_count": len(grp_indices),
-                    "alerted": False,
-                }
                 frame_group_data.append((gid, grp_indices, gc))
 
-        # Remove stale groups (not seen for > 3 s)
+        stale = [gid for gid, gd in group_trackers.items() if now - gd["last_seen"] > 3]
-        stale = [gid for gid, gd in _group_trackers.items() if now - gd["last_seen"] > 3]
+        for gid in stale: del group_trackers[gid]
-        for gid in stale:
-            del _group_trackers[gid]
 
-        # --- Alert logic (mark + metadata; save after drawing overlays) ---
+        # Alerting
         alert_this_frame = False
-        pending_alerts = []  # list of (gid, people_count, duration_seconds)
+        for gid, gdata in group_trackers.items():
-        for gid, gdata in _group_trackers.items():
+            if (gdata["last_seen"] - gdata["first_seen"]) >= GROUP_TIME_THRESHOLD and not gdata["alerted"]:
-            duration = gdata["last_seen"] - gdata["first_seen"]
+                if now - last_alert_time >= ALERT_COOLDOWN:
-            if duration >= GROUP_TIME_THRESHOLD and not gdata["alerted"]:
-                if now - _last_alert_time >= ALERT_COOLDOWN:
                     gdata["alerted"] = True
                     alert_this_frame = True
-                    _last_alert_time = now
+                    last_alert_time = now
-                    pending_alerts.append((gid, gdata["member_count"], duration))
-
-        # --- Draw overlays ---
-        display = frame.copy()
-
-        pending_gid_set = {gid for gid, _, _ in pending_alerts}
-        alert_person_indices = set()
-        for gid, grp_indices, _gc in frame_group_data:
-            if gid in pending_gid_set:
-                alert_person_indices.update(grp_indices)
-
-        # Live overlay: mark any person that belongs to any alerting group.
-        if pending_alerts:
-            max_people = max(people for _gid, people, _dur in pending_alerts)
-            max_dur = max(dur for _gid, _people, dur in pending_alerts)
-            cv2.putText(
-                display,
-                f"ALERT: {len(pending_alerts)} group(s) | {max_people} people | {int(max_dur)}s",
-                (12, 32),
-                cv2.FONT_HERSHEY_SIMPLEX,
-                0.8,
-                (0, 0, 255),
-                3,
-            )
-
-        for idx, (x1, y1, x2, y2, conf) in enumerate(person_boxes):
-            is_alert_person = idx in alert_person_indices
-            box_color = (0, 0, 255) if is_alert_person else (0, 255, 0)
-            cv2.rectangle(display, (int(x1), int(y1)), (int(x2), int(y2)), box_color, 2)
-            cv2.putText(
-                display, f"{conf:.0%}",
-                (int(x1), int(y1) - 6),
-                cv2.FONT_HERSHEY_SIMPLEX, 0.5, box_color, 2,
-            )
-
-        for gid, grp_indices, gc in frame_group_data:
-            gdata = _group_trackers.get(gid)
-            if gdata is None:
-                continue
-            duration = gdata["last_seen"] - gdata["first_seen"]
-            radius = int(PROXIMITY_PX * 0.6)
-            is_alert = duration >= GROUP_TIME_THRESHOLD
-            color = (0, 0, 255) if is_alert else (0, 165, 255)
-
-            cv2.circle(display, (int(gc[0]), int(gc[1])), radius, color, 2)
-            label = f"Group: {len(grp_indices)} | {duration:.0f}s"
-            cv2.putText(
-                display, label,
-                (int(gc[0]) - 70, int(gc[1]) - radius - 10),
-                cv2.FONT_HERSHEY_SIMPLEX, 0.55, color, 2,
-            )
-            if is_alert:
-                cv2.putText(
-                    display, "ALERT",
-                    (int(gc[0]) - 35, int(gc[1]) + radius + 25),
-                    cv2.FONT_HERSHEY_SIMPLEX, 0.8, (0, 0, 255), 3,
-                )
-
-        # --- Save annotated alerts (separate per group) ---
-        if pending_alerts:
                     os.makedirs("alerts", exist_ok=True)
                     ts = datetime.now().strftime("%Y%m%d_%H%M%S")
-
+                    path = f"alerts/alert_{ts}_{cam_id}_gid{gid}.jpg"
-            frame_group_by_id = {gid: (grp_indices, gc) for gid, grp_indices, gc in frame_group_data}
+                    cv2.imwrite(path, frame)
-
-            for gid, people, duration in pending_alerts:
-                grp_indices, gc = frame_group_by_id.get(gid, (None, None))
-                if grp_indices is None:
-                    continue
-
-                alert_display = frame.copy()
-                alert_person_set = set(grp_indices)
-
-                # Header annotation for this specific alert group.
-                cv2.putText(
-                    alert_display,
-                    f"ALERT GROUP {gid} | {people} people | {int(duration)}s",
-                    (12, 32),
-                    cv2.FONT_HERSHEY_SIMPLEX,
-                    0.9,
-                    (0, 0, 255),
-                    3,
-                )
-
-                # Draw only the person boxes relevant to this group.
-                for idx, (x1, y1, x2, y2, conf) in enumerate(person_boxes):
-                    is_alert_person = idx in alert_person_set
-                    box_color = (0, 0, 255) if is_alert_person else (0, 255, 0)
-                    cv2.rectangle(alert_display, (int(x1), int(y1)), (int(x2), int(y2)), box_color, 2)
-                    cv2.putText(
-                        alert_display,
-                        f"{conf:.0%}",
-                        (int(x1), int(y1) - 6),
-                        cv2.FONT_HERSHEY_SIMPLEX,
-                        0.5,
-                        box_color,
-                        2,
-                    )
-
-                # Draw only the circle/label for this group.
-                radius = int(PROXIMITY_PX * 0.6)
-                cv2.circle(alert_display, (int(gc[0]), int(gc[1])), radius, (0, 0, 255), 2)
-                cv2.putText(
-                    alert_display,
-                    f"Group: {len(grp_indices)} | {duration:.0f}s",
-                    (int(gc[0]) - 70, int(gc[1]) - radius - 10),
-                    cv2.FONT_HERSHEY_SIMPLEX,
-                    0.55,
-                    (0, 0, 255),
-                    2,
-                )
-                cv2.putText(
-                    alert_display,
-                    "ALERT",
-                    (int(gc[0]) - 35, int(gc[1]) + radius + 25),
-                    cv2.FONT_HERSHEY_SIMPLEX,
-                    0.8,
-                    (0, 0, 255),
-                    3,
-                )
-
-                # Include group id to avoid collisions when multiple groups alert in one second.
-                alert_path = f"alerts/alert_{ts}_gid{gid}.jpg"
-                cv2.imwrite(alert_path, alert_display)
-
-                alert_info = {
-                    "time": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
-                    "people": people,
-                    "duration": round(duration, 1),
-                    "image": alert_path,
-                }
                     with lock:
-                    state["alerts"].insert(0, alert_info)
+                        state["alerts"].insert(0, {"time": datetime.now().strftime("%H:%M:%S"), "camera": camera["name"], "people": gdata["member_count"], "duration": round(gdata["last_seen"]-gdata["first_seen"],1), "image": path})
                         state["alerts"] = state["alerts"][:50]
 
-        # --- Update shared state ---
+        # Overlays
-        groups_json = []
+        display = frame.copy()
-        for gid, gi, gc in frame_group_data:
+        cv2.putText(display, camera["name"], (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), 2)
-            gdata = _group_trackers.get(gid)
+        for x1, y1, x2, y2, conf in person_boxes:
-            if gdata:
+            cv2.rectangle(display, (int(x1), int(y1)), (int(x2), int(y2)), (0, 255, 0), 2)
-                groups_json.append({
+        for gid, grp_indices, gc in frame_group_data:
-                    "id": gid,
+            cv2.circle(display, (int(gc[0]), int(gc[1])), 50, (0, 165, 255), 2)
-                    "count": len(gi),
+
-                    "duration": round(gdata["last_seen"] - gdata["first_seen"], 1),
+        with lock:
+            state["cameras"][cam_id].update({
+                "frame": display,
+                "people_count": len(person_boxes),
+                "groups": [{"id": gid, "count": len(gi), "duration": round(group_trackers[gid]["last_seen"]-group_trackers[gid]["first_seen"], 1)} for gid, gi, gc in frame_group_data],
+                "alert_active": alert_this_frame,
+                "fps": round(fps, 1)
             })
 
-        with lock:
-            state["frame"] = display
-            state["people_count"] = len(person_boxes)
-            state["groups"] = groups_json
-            state["alert_active"] = alert_this_frame or any(
-                (gd["last_seen"] - gd["first_seen"]) >= GROUP_TIME_THRESHOLD
-                for gd in _group_trackers.values()
-            )
-            state["fps"] = round(fps, 1)
-
-
 # ---------------------------------------------------------------------------
-# MJPEG generator
+# Grid View Generator
 # ---------------------------------------------------------------------------
-
+def _update_grid_frame():
-def _generate_frames():
     while True:
+        frames = []
         with lock:
-            frame = state["frame"]
+            for cam_id in state["cameras"]:
-        if frame is not None:
+                if state["cameras"][cam_id]["frame"] is not None:
-            ok, buf = cv2.imencode(".jpg", frame, [cv2.IMWRITE_JPEG_QUALITY, 80])
+                    frames.append(cv2.resize(state["cameras"][cam_id]["frame"], (640, 480)))
-            if ok:
-                yield (
-                    b"--frame\r\n"
-                    b"Content-Type: image/jpeg\r\n\r\n" + buf.tobytes() + b"\r\n"
-                )
-        time.sleep(0.033)
         
+        if not frames:
+            time.sleep(0.1); continue
+
+        n = len(frames)
+        if n == 1: grid = frames[0]
+        elif n == 2: grid = np.hstack(frames)
+        else:
+            row1 = np.hstack(frames[:2])
+            if n == 3: row2 = np.hstack([frames[2], np.zeros_like(frames[0])])
+            else: row2 = np.hstack(frames[2:4])
+            grid = np.vstack([row1, row2])
+
+        with lock:
+            state["grid_frame"] = grid
+            state["total_people_count"] = sum(c["people_count"] for c in state["cameras"].values())
+            state["alert_active"] = any(c["alert_active"] for c in state["cameras"].values())
+        time.sleep(0.04)
 
 # ---------------------------------------------------------------------------
 # Routes
 # ---------------------------------------------------------------------------
-
 @app.route("/")
-def dashboard():
+def dashboard(): return render_template("dashboard.html")
-    return render_template("dashboard.html")
-
 
 @app.route("/video_feed")
 def video_feed():
-    return Response(
+    def gen():
-        _generate_frames(),
+        while True:
-        mimetype="multipart/x-mixed-replace; boundary=frame",
+            with lock: 
-    )
+                frame = state["grid_frame"]
-
+            if frame is not None:
+                _, buf = cv2.imencode(".jpg", frame, [cv2.IMWRITE_JPEG_QUALITY, 80])
+                yield (b"--frame\r\nContent-Type: image/jpeg\r\n\r\n" + buf.tobytes() + b"\r\n")
+            time.sleep(0.04)
+    return Response(gen(), mimetype="multipart/x-mixed-replace; boundary=frame")
 
 @app.route("/api/status")
 def api_status():
     with lock:
-        active_camera = _get_camera_by_id(state["active_camera_id"])
+        cams_info = {cid: {k:v for k,v in c.items() if k != "frame"} for cid, c in state["cameras"].items()}
         return jsonify({
-            "people_count": state["people_count"],
+            "total_people_count": state["total_people_count"],
-            "groups": state["groups"],
+            "cameras": cams_info,
             "alert_active": state["alert_active"],
-            "alerts": state["alerts"][:20],
+            "alerts": state["alerts"][:20]
-            "fps": state["fps"],
-            "stream_status": state["stream_status"],
-            "selected_camera_id": state["selected_camera_id"],
-            "active_camera_name": active_camera["name"] if active_camera else "Unknown",
         })
 
-
 @app.route("/api/cameras")
 def api_cameras():
-    return jsonify({
+    return jsonify({"cameras": [{"id": c["id"], "name": c["name"], "ip": c["ip"]} for c in CAMERAS]})
-        "cameras": [{"id": c["id"], "name": c["name"], "ip": c["ip"]} for c in CAMERAS]
-    })
-
-
-@app.route("/api/camera/select", methods=["POST"])
-def api_camera_select():
-    data = request.get_json(silent=True) or {}
-    camera_id = data.get("camera_id")
-    camera = _get_camera_by_id(camera_id)
-    if camera is None:
-        return jsonify({"ok": False, "error": "Invalid camera id"}), 400
-    with lock:
-        state["selected_camera_id"] = camera["id"]
-        state["frame"] = None
-        state["groups"] = []
-        state["people_count"] = 0
-        state["alert_active"] = False
-        state["fps"] = 0
-        state["stream_status"] = "connecting"
-    return jsonify({"ok": True})
-
 
 @app.route("/alerts/<path:filename>")
-def serve_alert_image(filename):
+def serve_alert_image(filename): return send_from_directory("alerts", filename)
-    return send_from_directory("alerts", filename)
-
-
-# ---------------------------------------------------------------------------
-# Entry point
-# ---------------------------------------------------------------------------
 
 if __name__ == "__main__":
-    threading.Thread(target=_process_stream, daemon=True).start()
+    for cam in CAMERAS: threading.Thread(target=_process_stream, args=(cam,), daemon=True).start()
-    print(f"\n  Surveillance Dashboard → http://localhost:5000\n")
+    threading.Thread(target=_update_grid_frame, daemon=True).start()
+    print("\n  Grid View Dashboard → http://localhost:5000\n")
     app.run(host="0.0.0.0", port=5000, debug=False, threaded=True)

templates/dashboard.html

@@ -3,7 +3,7 @@
 <head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
-<title>Surveillance Dashboard</title>
+<title>Surveillance Dashboard - Multi-Cam Grid</title>
 <style>
   *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
 
@@ -78,20 +78,11 @@
   @keyframes pulse { 0%,100%{ opacity:1 } 50%{ opacity:.35 } }
 
   .clock { font-size: .85rem; color: var(--text-dim); font-variant-numeric: tabular-nums; }
-  .camera-select {
-    background: var(--surface-2);
-    color: var(--text);
-    border: 1px solid var(--border);
-    border-radius: 8px;
-    padding: 6px 10px;
-    font-size: .85rem;
-    min-width: 170px;
-  }
 
   /* -------- Layout -------- */
   .container {
     display: grid;
-    grid-template-columns: 1fr 320px;
+    grid-template-columns: 1fr 340px;
     grid-template-rows: auto 1fr;
     gap: 20px;
     padding: 20px 28px 28px;
@@ -132,6 +123,7 @@
     overflow: hidden;
     position: relative;
     min-height: 480px;
+    aspect-ratio: 16/9;
   }
   .video-panel img {
     width: 100%;
@@ -173,10 +165,8 @@
     letter-spacing: .5px;
     box-shadow: 0 8px 30px rgba(239,68,68,.35);
     z-index: 200;
-    animation: bannerIn .4s ease-out;
   }
   .alert-banner.show { display: flex; align-items: center; gap: 10px; }
-  @keyframes bannerIn { from { opacity:0; transform:translateX(-50%) translateY(-12px); } }
 
   /* -------- Sidebar -------- */
   .sidebar {
@@ -201,7 +191,6 @@
   }
   .panel-body { padding: 12px 16px; }
 
-  /* Groups panel */
   .group-item {
     display: flex;
     justify-content: space-between;
@@ -211,8 +200,8 @@
   }
   .group-item:last-child { border-bottom: none; }
   .group-meta { display: flex; flex-direction: column; gap: 2px; }
-  .group-meta span:first-child { font-weight: 600; font-size: .9rem; }
+  .group-meta span:first-child { font-weight: 600; font-size: .95rem; }
-  .group-meta span:last-child  { font-size: .75rem; color: var(--text-dim); }
+  .group-meta .cam-name { font-size: .75rem; color: var(--accent); }
   .group-timer {
     font-variant-numeric: tabular-nums;
     font-weight: 700;
@@ -221,290 +210,152 @@
     border-radius: 6px;
     background: var(--surface-2);
   }
-  .group-timer.warning { color: var(--orange); background: rgba(245,158,11,.1); }
   .group-timer.danger  { color: var(--red);    background: rgba(239,68,68,.1);  }
-  .no-groups { color: var(--text-dim); font-size: .85rem; padding: 8px 0; }
 
-  /* Alert history */
+  .alert-log { max-height: 480px; overflow-y: auto; }
-  .alert-log {
-    max-height: 380px;
-    overflow-y: auto;
-    scrollbar-width: thin;
-    scrollbar-color: var(--border) transparent;
-  }
   .alert-entry {
     display: flex;
     gap: 12px;
-    padding: 10px 0;
+    padding: 12px 8px;
     border-bottom: 1px solid var(--border);
     cursor: pointer;
-    transition: background .2s;
-    border-radius: 6px;
-    padding: 10px 8px;
   }
   .alert-entry:hover { background: var(--surface-2); }
-  .alert-entry:last-child { border-bottom: none; }
+  .alert-thumb { width: 80px; height: 50px; border-radius: 4px; object-fit: cover; }
-  .alert-thumb {
-    width: 64px;
-    height: 44px;
-    border-radius: 6px;
-    object-fit: cover;
-    border: 1px solid var(--border);
-    flex-shrink: 0;
-  }
-  .alert-info { display: flex; flex-direction: column; gap: 2px; }
   .alert-info .time { font-size: .75rem; color: var(--text-dim); }
-  .alert-info .desc { font-size: .82rem; font-weight: 600; }
+  .alert-info .desc { font-size: .85rem; font-weight: 600; display: block; }
-  .alert-info .duration { font-size: .72rem; color: var(--orange); }
-
-  /* -------- Lightbox -------- */
-  .lightbox {
-    display: none;
-    position: fixed;
-    inset: 0;
-    background: rgba(0,0,0,.85);
-    z-index: 300;
-    justify-content: center;
-    align-items: center;
-    cursor: pointer;
-  }
-  .lightbox.open { display: flex; }
-  .lightbox img {
-    max-width: 90vw;
-    max-height: 85vh;
-    border-radius: 8px;
-    box-shadow: 0 12px 60px rgba(0,0,0,.6);
-  }
-
-  /* -------- Responsive -------- */
-  @media (max-width: 960px) {
-    .container {
-      grid-template-columns: 1fr;
-    }
-    .kpi-strip {
-      grid-template-columns: repeat(2, 1fr);
-    }
-  }
 </style>
 </head>
 <body>
 
-<!-- Alert banner -->
 <div class="alert-banner" id="alertBanner">
   <svg width="20" height="20" fill="none" stroke="currentColor" stroke-width="2.2" viewBox="0 0 24 24"><path d="M10.29 3.86L1.82 18a2 2 0 001.71 3h16.94a2 2 0 001.71-3L13.71 3.86a2 2 0 00-3.42 0z"/><line x1="12" y1="9" x2="12" y2="13"/><line x1="12" y1="17" x2="12.01" y2="17"/></svg>
-  GATHERING ALERT — People grouped for over 20 seconds
+  GATHERING DETECTED — Multiple groups active
 </div>
 
 <header>
   <div class="logo">
     <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8"><path d="M23 19a2 2 0 01-2 2H3a2 2 0 01-2-2V8a2 2 0 012-2h4l2-3h6l2 3h4a2 2 0 012 2z"/><circle cx="12" cy="13" r="4"/></svg>
-    Surveillance Dashboard
+    Surveillance Dash: Multi-Grid
   </div>
   <div class="header-right">
-    <select id="cameraSelect" class="camera-select"></select>
+    <div class="status-badge live" id="statusBadge">
-    <div class="status-badge connecting" id="statusBadge">
       <span class="dot"></span>
-      <span id="statusText">Connecting</span>
+      <span id="statusText">System Live</span>
     </div>
     <div class="clock" id="clock"></div>
   </div>
 </header>
 
 <div class="container">
-  <!-- KPI strip -->
   <div class="kpi-strip">
-    <div class="kpi" id="kpiPeople">
+    <div class="kpi">
-      <span class="kpi-label">People Detected</span>
+      <span class="kpi-label">People (Total)</span>
       <span class="kpi-value accent" id="valPeople">0</span>
     </div>
-    <div class="kpi" id="kpiGroups">
+    <div class="kpi">
       <span class="kpi-label">Active Groups</span>
       <span class="kpi-value orange" id="valGroups">0</span>
     </div>
     <div class="kpi" id="kpiAlerts">
-      <span class="kpi-label">Total Alerts</span>
+      <span class="kpi-label">Global Alerts</span>
       <span class="kpi-value red" id="valAlerts">0</span>
     </div>
     <div class="kpi">
-      <span class="kpi-label">FPS</span>
+      <span class="kpi-label">Node Status</span>
-      <span class="kpi-value green" id="valFps">0</span>
+      <span class="kpi-value green" id="valNodes">Online</span>
     </div>
   </div>
 
-  <!-- Video feed -->
   <div class="video-panel">
-    <img id="videoFeed" src="/video_feed" alt="Live Feed">
+    <img id="videoFeed" src="/video_feed" alt="Simultaneous Feed">
     <div class="video-overlay">
-      <span class="overlay-tag">LIVE</span>
+      <span class="overlay-tag">GRID VIEW</span>
-      <span class="overlay-tag" id="overlayPeople">0 People</span>
+      <span class="overlay-tag" id="overlayPeople">0 People Total</span>
     </div>
   </div>
 
-  <!-- Sidebar -->
   <div class="sidebar">
-    <!-- Active groups -->
     <div class="panel">
-      <div class="panel-header">Active Groups</div>
+      <div class="panel-header">Active Groups (All Cams)</div>
       <div class="panel-body" id="groupList">
-        <div class="no-groups">No groups detected</div>
+        <div style="color:var(--text-dim); font-size:.8rem;">Monitoring...</div>
       </div>
     </div>
 
-    <!-- Alert history -->
     <div class="panel" style="flex:1;">
-      <div class="panel-header">Alert History</div>
+      <div class="panel-header">Global Alert History</div>
       <div class="panel-body alert-log" id="alertLog">
-        <div class="no-groups">No alerts yet</div>
+        <div style="color:var(--text-dim); font-size:.8rem;">Scanning for events...</div>
       </div>
     </div>
   </div>
 </div>
 
-<!-- Lightbox for alert images -->
-<div class="lightbox" id="lightbox" onclick="this.classList.remove('open')">
-  <img id="lightboxImg" src="" alt="Alert snapshot">
-</div>
-
 <script>
 function updateClock() {
   const now = new Date();
-  document.getElementById('clock').textContent = now.toLocaleString('en-US', {
+  document.getElementById('clock').textContent = now.toLocaleTimeString();
-    hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false,
-    year: 'numeric', month: 'short', day: 'numeric'
-  });
 }
 setInterval(updateClock, 1000);
 updateClock();
 
 let prevAlertActive = false;
-let bannerTimeout = null;
-let camerasLoaded = false;
-
-async function loadCameras() {
-  try {
-    const res = await fetch('/api/cameras');
-    const data = await res.json();
-    const select = document.getElementById('cameraSelect');
-    select.innerHTML = data.cameras
-      .map(c => `<option value="${c.id}">${c.name} (${c.ip})</option>`)
-      .join('');
-    camerasLoaded = true;
-  } catch (e) {
-    console.error('Failed to load cameras', e);
-  }
-}
-
-async function selectCamera(cameraId) {
-  try {
-    await fetch('/api/camera/select', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ camera_id: cameraId })
-    });
-  } catch (e) {
-    console.error('Failed to switch camera', e);
-  }
-}
 
 async function poll() {
   try {
     const res = await fetch('/api/status');
     const d = await res.json();
 
-    // Aggregated KPIs
+    document.getElementById('valPeople').textContent = d.total_people_count;
-    const totalPeople = d.total_people_count;
-    let totalGroups = 0;
-    let allGroups = [];
-    
-    Object.keys(d.cameras).forEach(cid => {
-      const camData = d.cameras[cid];
-      totalGroups += camData.groups.length;
-      camData.groups.forEach(g => {
-        allGroups.push({...g, camName: camData.name});
-      });
-    });
-
-    document.getElementById('valPeople').textContent = totalPeople;
-    document.getElementById('valGroups').textContent  = totalGroups;
     document.getElementById('valAlerts').textContent  = d.alerts.length;
-    document.getElementById('valFps').textContent     = "GRID"; 
+    document.getElementById('overlayPeople').textContent = d.total_people_count + ' People Total';
-    document.getElementById('overlayPeople').textContent = totalPeople + ' People Total';
 
-    // Stream status badge (Aggregated)
+    let allGroups = [];
-    const badge = document.getElementById('statusBadge');
+    Object.keys(d.cameras).forEach(id => {
-    const stext = document.getElementById('statusText');
+        d.cameras[id].groups.forEach(g => allGroups.push({...g, camName: d.cameras[id].name}));
-    const statuses = Object.values(d.cameras).map(c => c.status);
+    });
     
-    if (statuses.includes('error')) {
+    document.getElementById('valGroups').textContent = allGroups.length;
-      badge.className = 'status-badge error';
+    document.getElementById('kpiAlerts').classList.toggle('alert-glow', d.alert_active);
-      stext.textContent = 'SYSTEM ERROR';
-    } else if (statuses.includes('connecting') || statuses.includes('reconnecting')) {
-      badge.className = 'status-badge connecting';
-      stext.textContent = 'CONNECTING...';
-    } else {
-      badge.className = 'status-badge live';
-      stext.textContent = 'ALL SYSTEMS LIVE';
-    }
 
-    // Alert KPI glow
-    const kpiAlerts = document.getElementById('kpiAlerts');
-    kpiAlerts.classList.toggle('alert-glow', d.alert_active);
-
-    // Alert banner
     const banner = document.getElementById('alertBanner');
-    if (d.alert_active && !prevAlertActive) {
+    if (d.alert_active && !prevAlertActive) banner.classList.add('show');
-      banner.classList.add('show');
+    else if (!d.alert_active) banner.classList.remove('show');
-      clearTimeout(bannerTimeout);
-      bannerTimeout = setTimeout(() => banner.classList.remove('show'), 8000);
-    }
     prevAlertActive = d.alert_active;
 
-    // Groups list (Aggregated)
     const gl = document.getElementById('groupList');
-    if (allGroups.length === 0) {
+    if (allGroups.length === 0) gl.innerHTML = '<div style="color:var(--text-dim); font-size:.8rem;">No groups detected</div>';
-      gl.innerHTML = '<div class="no-groups">No groups detected</div>';
+    else {
-    } else {
+      gl.innerHTML = allGroups.map(g => `
-      gl.innerHTML = allGroups.map(g => {
+        <div class="group-item">
-        const cls = g.duration >= 20 ? 'danger' : g.duration >= 10 ? 'warning' : '';
-        return `<div class="group-item">
           <div class="group-meta">
-            <span>${g.count} People - ${g.camName}</span>
+            <span>${g.count} People</span>
-            <span>Group #${g.id}</span>
+            <span class="cam-name">${g.camName}</span>
           </div>
-          <span class="group-timer ${cls}">${g.duration}s</span>
+          <span class="group-timer ${g.duration > 20 ? 'danger' : ''}">${g.duration}s</span>
-        </div>`;
+        </div>
-      }).join('');
+      `).join('');
     }
 
-    // Alert log
     const al = document.getElementById('alertLog');
-    if (d.alerts.length === 0) {
+    if (d.alerts.length === 0) al.innerHTML = '<div style="color:var(--text-dim); font-size:.8rem;">No alerts recorded</div>';
-      al.innerHTML = '<div class="no-groups">No alerts yet</div>';
+    else {
-    } else {
       al.innerHTML = d.alerts.map(a => `
-        <div class="alert-entry" onclick="openLightbox('/${a.image}')">
+        <div class="alert-entry">
           <img class="alert-thumb" src="/${a.image}" alt="Alert">
           <div class="alert-info">
-            <span class="time">${a.time} - ${a.camera || 'Unknown'}</span>
+            <span class="time">${a.time} - ${a.camera}</span>
             <span class="desc">${a.people} people gathered</span>
-            <span class="duration">Duration: ${a.duration}s</span>
           </div>
         </div>
       `).join('');
     }
 
-  } catch (e) {
+  } catch (e) { console.error('Poll error', e); }
-    console.error('Poll error', e);
-  }
 }
 
-function openLightbox(src) {
+setInterval(poll, 1500);
-  document.getElementById('lightboxImg').src = src;
-  document.getElementById('lightbox').classList.add('open');
-}
-
-setInterval(poll, 1000);
-loadCameras().then(poll);
 poll();
 </script>
 </body>