From a4868184d4bc32f08e7644344e5c5672a78263b9 Mon Sep 17 00:00:00 2001
From: Josh Hawkins <32435876+hawkeye217@users.noreply.github.com>
Date: Fri, 22 May 2026 08:40:15 -0500
Subject: [PATCH] use setdefault when adding a new camera
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Multiple subscribers in the same process each unpickle the ZMQ payload independently and would otherwise write divergent Python objects to the shared cameras dict — leaving long-lived references (e.g. CameraState.camera_config) pointing at a copy that subsequent in-place mutations like apply_section_update can never reach. setdefault collapses everyone onto the first writer's object so attribute mutations propagate to every consumer in this process.
---
 frigate/config/camera/updater.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/frigate/config/camera/updater.py b/frigate/config/camera/updater.py
index 95092da08b..852fadbe22 100644
--- a/frigate/config/camera/updater.py
+++ b/frigate/config/camera/updater.py
@@ -84,8 +84,8 @@ class CameraConfigUpdateSubscriber:
         self, camera: str, update_type: CameraConfigUpdateEnum, updated_config: Any
     ) -> None:
         if update_type == CameraConfigUpdateEnum.add:
-            self.config.cameras[camera] = updated_config
-            self.camera_configs[camera] = updated_config
+            shared = self.config.cameras.setdefault(camera, updated_config)
+            self.camera_configs[camera] = shared
             return
         elif update_type == CameraConfigUpdateEnum.remove:
             self.config.cameras.pop(camera, None)