From 513c0a8473e3e40f955e645c3dbcb4eba9faae45 Mon Sep 17 00:00:00 2001
From: "T. Tradesman" <184814242+ttradesman@users.noreply.github.com>
Date: Thu, 23 Jul 2026 11:52:43 +0200
Subject: [PATCH] fix(event/stream): classify AXIS VMD 3 topics as motion
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

VMD 3 is the firmware-builtin motion rule, published as
tns1:RuleEngine/tnsaxis:VMD3/vmd3_video_<N>. It predates the VMD 4 ACAP
and lives under RuleEngine rather than CameraApplicationPlatform, so the
VMD 4 rule added in the previous commit does not cover it.

Confirmed against a deployed AXIS camera: with debug logging on, its
event stream emits vmd3_video_1 on every motion trigger, and every one
was discarded as KindUnknown.

The VMD 4 rule stays — both generations are in the field.
---
 event/stream/topics.go      | 9 ++++++++-
 event/stream/topics_test.go | 6 ++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/event/stream/topics.go b/event/stream/topics.go
index 552c132..1345233 100644
--- a/event/stream/topics.go
+++ b/event/stream/topics.go
@@ -79,7 +79,14 @@ var topicRules = []struct {
 	// https://developer.axis.com/vapix/network-video/event-and-action-services/
 	{"MotionRegionDetector/Motion", KindMotion},
 
-	// AXIS ACAP motion apps with Camera<N>Profile<ID> suffixes. VMD is
+	// tns1:RuleEngine/tnsaxis:VMD3/vmd3_video_<N> — AXIS VMD 3, the
+	// firmware-builtin predecessor of the VMD 4 ACAP. It lives under
+	// RuleEngine, not CameraApplicationPlatform, so the VMD rule below
+	// does not cover it. Still shipping on deployed cameras.
+	// https://developer.axis.com/vapix/network-video/event-and-action-services/
+	{"RuleEngine/VMD3/", KindMotion},
+
+	// AXIS ACAP motion apps with Camera<N>Profile<ID> suffixes. VMD 4 is
 	// the stock app shipped on the camera; the Guard suite are the
 	// paid analytics products. Prefix-match because of the suffix.
 	// https://developer.axis.com/vapix/applications/vmd4
diff --git a/event/stream/topics_test.go b/event/stream/topics_test.go
index 617bf5b..8e12e26 100644
--- a/event/stream/topics_test.go
+++ b/event/stream/topics_test.go
@@ -31,6 +31,12 @@ func TestClassifyTopic(t *testing.T) {
 		{"axis_vmd4_profile_any", "tnsaxis:CameraApplicationPlatform/VMD/Camera1ProfileANY", KindMotion},
 		{"axis_vmd4_profile_numbered", "tnsaxis:CameraApplicationPlatform/VMD/Camera1Profile1", KindMotion},
 
+		// AXIS VMD 3 — the firmware-builtin predecessor, published under
+		// RuleEngine rather than CameraApplicationPlatform. Still shipping
+		// on deployed cameras; observed on site-07 camera-10.
+		{"axis_vmd3_video_1", "tns1:RuleEngine/tnsaxis:VMD3/vmd3_video_1", KindMotion},
+		{"axis_vmd3_video_2", "tns1:RuleEngine/tnsaxis:VMD3/vmd3_video_2", KindMotion},
+
 		// --- Tampering --------------------------------------------------
 
 		{"tamper_detector", "tns1:RuleEngine/TamperDetector/Tamper", KindTampering},