diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a77db67..ba9ce616 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Added
+
+- 📈(frontend) capture media diagnostics on media errors
+
 ### Changed
 
 - ♻️(frontend) encapsulate error tracking behind a telemetry module
diff --git a/src/frontend/src/features/analytics/telemetry.ts b/src/frontend/src/features/analytics/telemetry.ts
index 5d87a1b3..60bce040 100644
--- a/src/frontend/src/features/analytics/telemetry.ts
+++ b/src/frontend/src/features/analytics/telemetry.ts
@@ -52,3 +52,89 @@ export const reportError = (
     console.warn(`[${logCode}]`, e, extraInfo)
   }
 }
+
+export interface DeviceSnapshot {
+  cam_count: number
+  mic_count: number
+  out_count: number
+  labels_visible: boolean
+  saved_cam_present: boolean | null
+  saved_mic_present: boolean | null
+  saved_video_device_id_set: boolean
+  saved_audio_device_id_set: boolean
+  audio_enabled: boolean | null
+  video_enabled: boolean | null
+  cam_permission: PermissionState | 'unknown'
+  mic_permission: PermissionState | 'unknown'
+}
+
+/** Reads the persisted LiveKit user choices without importing the store. */
+const readPersistedChoices = (): {
+  videoDeviceId?: string
+  audioDeviceId?: string
+  videoEnabled?: boolean
+  audioEnabled?: boolean
+} => {
+  try {
+    return JSON.parse(localStorage.getItem('lk-user-choices') ?? '{}')
+  } catch {
+    return {}
+  }
+}
+
+const queryPermission = async (
+  name: 'camera' | 'microphone'
+): Promise<PermissionState | 'unknown'> => {
+  try {
+    const status = await navigator.permissions.query({
+      name: name as PermissionName,
+    })
+    return status.state
+  } catch {
+    return 'unknown'
+  }
+}
+
+export const deviceSnapshot = async (): Promise<DeviceSnapshot> => {
+  const choices = readPersistedChoices()
+  let devices: MediaDeviceInfo[] = []
+  try {
+    devices = await navigator.mediaDevices.enumerateDevices()
+  } catch {
+    /* snapshot stays partial */
+  }
+  const ofKind = (k: MediaDeviceKind) => devices.filter((d) => d.kind === k)
+  const present = (k: MediaDeviceKind, id?: string) =>
+    id ? ofKind(k).some((d) => d.deviceId === id) : null
+
+  const [cam_permission, mic_permission] = await Promise.all([
+    queryPermission('camera'),
+    queryPermission('microphone'),
+  ])
+
+  return {
+    cam_count: ofKind('videoinput').length,
+    mic_count: ofKind('audioinput').length,
+    out_count: ofKind('audiooutput').length,
+    labels_visible: devices.some((d) => !!d.label),
+    saved_cam_present: present('videoinput', choices.videoDeviceId),
+    saved_mic_present: present('audioinput', choices.audioDeviceId),
+    saved_video_device_id_set: !!choices.videoDeviceId,
+    saved_audio_device_id_set: !!choices.audioDeviceId,
+    audio_enabled: choices.audioEnabled ?? null,
+    video_enabled: choices.videoEnabled ?? null,
+    cam_permission,
+    mic_permission,
+  }
+}
+
+export const captureMediaEvent = async (
+  event:
+    | 'media-device-error'
+    | 'media-acquisition'
+    | 'media-device-topology'
+    | 'media-device-success',
+  props: Record<string, unknown>
+) => {
+  captureEvent(event, { ...props, ...(await deviceSnapshot()) })
+}
diff --git a/src/frontend/src/features/rooms/components/Conference.tsx b/src/frontend/src/features/rooms/components/Conference.tsx
index 92e517ed..63762bb7 100644
--- a/src/frontend/src/features/rooms/components/Conference.tsx
+++ b/src/frontend/src/features/rooms/components/Conference.tsx
@@ -26,7 +26,11 @@ import { css } from '@/styled-system/css'
 import { BackgroundProcessorFactory } from '../livekit/components/blur'
 import { LocalUserChoices } from '@/stores/userChoices'
 import { MediaDeviceErrorAlert } from './MediaDeviceErrorAlert'
-import { captureEvent, reportError } from '@/features/analytics/telemetry'
+import {
+  captureEvent,
+  reportError,
+  captureMediaEvent,
+} from '@/features/analytics/telemetry'
 import { useConfig } from '@/api/useConfig'
 import { isFireFox } from '@/utils/livekit'
 import { useIsMobile } from '@/utils/useIsMobile'
@@ -235,6 +239,7 @@ export const Conference = ({
           })}
           onError={(e) => {
             reportError('livekit_room_error', e, {
+              path: 'connect_publish',
               failure: MediaDeviceFailure.getFailure(e) ?? 'not-a-device-error',
             })
           }}
@@ -297,8 +302,19 @@ export const Conference = ({
             }
           }}
           onMediaDeviceFailure={(e, kind) => {
-            if (e == MediaDeviceFailure.DeviceInUse && !!kind) {
-              setMediaDeviceError({ error: e, kind })
+            if (!e || !kind) return
+            void captureMediaEvent('media-device-error', {
+              log_code: 'media_devices_error_event',
+              path: 'connect_publish',
+              failure: e,
+              kind,
+            })
+            switch (e) {
+              case MediaDeviceFailure.DeviceInUse:
+                setMediaDeviceError({ error: e, kind })
+                break
+              default:
+                break
             }
           }}
         >