Dynamically enable/disable cameras (#16894)

* config options

* metrics

* stop and restart ffmpeg processes

* dispatcher

* frontend websocket

* buttons for testing

* don't recreate log pipe

* add/remove cam from birdseye when enabling/disabling

* end all objects and send empty camera activity

* enable/disable switch in ui

* disable buttons when camera is disabled

* use enabled_in_config for some frontend checks

* tweaks

* handle settings pane with disabled cameras

* frontend tweaks

* change to debug log

* mqtt docs

* tweak

* ensure all ffmpeg processes are initially started

* clean up

* use zmq

* remove camera metrics

* remove camera metrics

* tweaks

* frontend tweaks

web/src/hooks/use-camera-activity.ts

@@ -1,4 +1,5 @@
 import {
+  useEnabledState,
   useFrigateEvents,
   useInitialCameraState,
   useMotionActivity,
@@ -15,6 +16,7 @@ import useSWR from "swr";
 import { getAttributeLabels } from "@/utils/iconUtil";
 
 type useCameraActivityReturn = {
+  enabled: boolean;
   activeTracking: boolean;
   activeMotion: boolean;
   objects: ObjectType[];
@@ -56,6 +58,7 @@ export function useCameraActivity(
     [objects],
   );
 
+  const { payload: cameraEnabled } = useEnabledState(camera.name);
   const { payload: detectingMotion } = useMotionActivity(camera.name);
   const { payload: event } = useFrigateEvents();
   const updatedEvent = useDeepMemo(event);
@@ -145,12 +148,17 @@ export function useCameraActivity(
     return cameras[camera.name].camera_fps == 0 && stats["service"].uptime > 60;
   }, [camera, stats]);
 
+  const isCameraEnabled = cameraEnabled === "ON";
+
   return {
-    activeTracking: hasActiveObjects,
-    activeMotion: detectingMotion
-      ? detectingMotion === "ON"
-      : updatedCameraState?.motion === true,
-    objects,
+    enabled: isCameraEnabled,
+    activeTracking: isCameraEnabled ? hasActiveObjects : false,
+    activeMotion: isCameraEnabled
+      ? detectingMotion
+        ? detectingMotion === "ON"
+        : updatedCameraState?.motion === true
+      : false,
+    objects: isCameraEnabled ? objects : [],
     offline,
   };
 }