From 29c6fde443d1ab13fe598526e5747849e5986173 Mon Sep 17 00:00:00 2001
From: Josh Hawkins <32435876+hawkeye217@users.noreply.github.com>
Date: Fri, 22 May 2026 14:08:06 -0500
Subject: [PATCH] regenerate zone contours and per-zone filter masks on detect
 resolution change

---
 frigate/api/app.py     |  7 +++++++
 frigate/util/config.py | 11 +++++++++++
 2 files changed, 18 insertions(+)

diff --git a/frigate/api/app.py b/frigate/api/app.py
index 179c7fb90a..35eed2b9ce 100644
--- a/frigate/api/app.py
+++ b/frigate/api/app.py
@@ -770,6 +770,13 @@ def _config_set_in_memory(request: Request, body: AppConfigSetBody) -> JSONRespo
                             ),
                             cam_cfg.objects,
                         )
+                        if cam_cfg.zones:
+                            request.app.config_publisher.publish_update(
+                                CameraConfigUpdateTopic(
+                                    CameraConfigUpdateEnum.zones, camera
+                                ),
+                                cam_cfg.zones,
+                            )
                         request.app.config_publisher.publish_update(
                             CameraConfigUpdateTopic(
                                 CameraConfigUpdateEnum.refresh, camera
diff --git a/frigate/util/config.py b/frigate/util/config.py
index 5e5d2a0fc8..431c8bff53 100644
--- a/frigate/util/config.py
+++ b/frigate/util/config.py
@@ -816,6 +816,17 @@ def apply_section_update(camera_config, section: str, update: dict) -> Optional[
                     **filt.model_dump(exclude_unset=True, exclude={"mask", "raw_mask"}),
                 )
 
+            # Regenerate zone contours and per-zone filter masks at the new
+            # frame_shape so zone outlines and membership stay relative
+            for zone in camera_config.zones.values():
+                if zone.filters:
+                    for zone_obj_name, zone_filter in zone.filters.items():
+                        zone.filters[zone_obj_name] = RuntimeFilterConfig(
+                            frame_shape=new_frame_shape,
+                            **zone_filter.model_dump(exclude_unset=True),
+                        )
+                zone.generate_contour(new_frame_shape)
+
         else:
             merged = deep_merge(current.model_dump(), update, override=True)
             setattr(camera_config, section, current.__class__.model_validate(merged))