Initial commit

README.md

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+# OBS Replay Buffer for IT Support
+
+IT support tool that runs OBS Studio's replay buffer silently on VDI sessions, giving users a system tray button to save the last N minutes of screen activity when an issue occurs. Clips are saved to a central UNC share organized by username.
+
+## How It Works
+
+1. DEM assigns this to targeted users at logon via App Volumes (OBS) + file transfer + logon task
+2. OBS launches hidden with the replay buffer running — users never see the OBS interface
+3. A system tray icon appears — right-click → **Save Replay**
+4. The clip saves to `\\server\ITCaptures\<username>\YYYY-MM-DD_HH-MM-SS.mkv`
+
+## Architecture
+
+| Component | Role |
+|---|---|
+| **App Volumes AppStack** | Delivers OBS Studio to targeted VDI sessions |
+| **DEM File Transfer** | Drops OBS config files into `%APPDATA%\obs-studio\` at logon |
+| **DEM Logon Task** | Runs `Start-OBSReplayBuffer.ps1` at logon |
+| **`config.psd1`** | Central config — UNC path, buffer duration, OBS executable path |
+| **`Start-OBSReplayBuffer.ps1`** | Creates user capture folder, writes OBS profile, launches OBS + tray icon |
+| **`Show-ReplayTray.ps1`** | WinForms system tray icon — right-click menu with Save Replay / Exit |
+| **`Invoke-ReplaySave.ps1`** | Sends `SaveReplayBuffer` to OBS via WebSocket v5 (built into OBS 28+) |
+| **`obs-config/`** | OBS profile, scene collection, and WebSocket config delivered by DEM |
+
+## Repository Structure
+
+```
+obs-replay-buffer/
+├── config.psd1
+├── scripts/
+│   ├── Start-OBSReplayBuffer.ps1
+│   ├── Show-ReplayTray.ps1
+│   └── Invoke-ReplaySave.ps1
+└── obs-config/
+    ├── global.ini
+    ├── profiles/
+    │   └── ITMonitor/
+    │       └── basic.ini
+    ├── scenes/
+    │   └── ITMonitor.json
+    └── plugin_config/
+        └── obs-websocket/
+            └── config.json
+```
+
+## Prerequisites
+
+- **OBS Studio 28+** packaged as an App Volumes AppStack (WebSocket v5 is built in — no plugin needed)
+- **VMware App Volumes** to deliver OBS to targeted users
+- **VMware DEM** to deliver config files and run the logon task
+- A **UNC share** writable by VDI users for clip storage
+- A **network share** to host this repo's files, accessible from all VDI machines
+
+## Configuration
+
+Edit `config.psd1` before deploying:
+
+| Key | Description | Default |
+|---|---|---|
+| `UNCPath` | Base UNC path for clip storage — username subfolder created automatically | `\\server\ITCaptures` |
+| `BufferSeconds` | Replay buffer duration in seconds | `120` |
+| `WebSocketPort` | OBS WebSocket port — must match `obs-config/plugin_config/obs-websocket/config.json` | `4455` |
+| `OBSExecutable` | Full path to `obs64.exe` on the VDI machine | `C:\Program Files\obs-studio\bin\64bit\obs64.exe` |
+| `ProfileName` | OBS profile name — must match the folder under `obs-config/profiles/` | `ITMonitor` |
+| `SceneCollection` | OBS scene collection name — must match the filename under `obs-config/scenes/` | `ITMonitor` |
+
+## Deployment
+
+### Step 1 — Host the repo on a network share
+
+Place this repo (or a copy of it) on a share accessible from all VDI machines, e.g.:
+
+```
+\\stcu-fs01\IT-Tools\OBS-Record\
+```
+
+### Step 2 — DEM: File Transfer tasks
+
+Create these file transfer tasks in DEM, scoped to the target user group. All run at logon.
+
+| Source (on network share) | Destination (on VDI session) |
+|---|---|
+| `obs-config\profiles\ITMonitor\` | `%APPDATA%\obs-studio\basic\profiles\ITMonitor\` |
+| `obs-config\scenes\ITMonitor.json` | `%APPDATA%\obs-studio\basic\scenes\ITMonitor.json` |
+| `obs-config\plugin_config\obs-websocket\config.json` | `%APPDATA%\obs-studio\plugin_config\obs-websocket\config.json` |
+| `obs-config\global.ini` | `%APPDATA%\obs-studio\global.ini` |
+
+> **Note:** `basic.ini` is intentionally not delivered by DEM — it is written dynamically at logon by `Start-OBSReplayBuffer.ps1` so that the correct UNC path (including username) and primary monitor resolution are baked in per session.
+
+### Step 3 — DEM: Logon task
+
+Create one logon task in DEM (scoped to the same target group). Set it to **not wait for completion**.
+
+```
+powershell.exe -ExecutionPolicy Bypass -NonInteractive -WindowStyle Hidden -File "\\stcu-fs01\IT-Tools\OBS-Record\scripts\Start-OBSReplayBuffer.ps1"
+```
+
+This script handles launching both OBS and the tray icon — no second task needed.
+
+### Step 4 — Assign App Volumes AppStack
+
+Assign the OBS AppStack to the same user group in App Volumes. The logon task will exit cleanly if OBS is not present or already running.
+
+## User Experience
+
+- A shield icon appears in the system tray at logon — no other UI is visible
+- Right-click the icon → **Save Replay** to save the last `BufferSeconds` of screen activity
+- A balloon notification confirms success or failure
+- Clips appear at `\\server\ITCaptures\<username>\` named by timestamp
+
+## Changing the Buffer Duration
+
+Update `BufferSeconds` in `config.psd1`. The value is written into the OBS profile at each logon, so no repackaging of the App Volumes AppStack is needed.
+
+## Notes
+
+### Scene Collection JSON
+
+The `obs-config/scenes/ITMonitor.json` file was generated to target monitor index `0` (primary display). If it does not capture correctly on first use:
+
+1. Launch OBS normally on a test machine with the AppStack assigned
+2. Manually configure a Display Capture source pointed at the primary monitor
+3. Save, then copy `%APPDATA%\obs-studio\basic\scenes\ITMonitor.json` back into this repo
+
+The `basic.ini` and WebSocket config are reliable and should not need adjustment.
+
+### OBS Tray Icon vs. IT Tray Icon
+
+OBS itself also places a tray icon when minimized to tray. Users will see two icons — the OBS icon and the IT Screen Recorder shield icon. The OBS icon can be right-clicked to quit OBS, which would break the replay buffer. If this is a concern, a future enhancement could hide the OBS tray icon via a startup flag or OBS config setting.

config.psd1

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+@{
+    # Base UNC path for saved clips — a subfolder per username is created automatically
+    UNCPath        = '\\server\ITCaptures'
+
+    # Replay buffer duration in seconds (120 = 2 minutes)
+    BufferSeconds  = 120
+
+    # OBS WebSocket port — must match obs-config/plugin_config/obs-websocket/config.json
+    WebSocketPort  = 4455
+
+    # Full path to OBS executable (standard App Volumes / Program Files install)
+    OBSExecutable  = 'C:\Program Files\obs-studio\bin\64bit\obs64.exe'
+
+    # Must match the profile folder name and scene collection filename
+    ProfileName    = 'ITMonitor'
+    SceneCollection = 'ITMonitor'
+}

obs-config/global.ini

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+[General]
+EnableAutoUpdates=false
+
+[BasicWindow]
+SysTrayEnabled=true
+SysTrayWhenStarted=true
+ShowOnStartup=false

obs-config/plugin_config/obs-websocket/config.json

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+{
+    "alerts_enabled": false,
+    "auth_required": false,
+    "server_enabled": true,
+    "server_port": 4455
+}

obs-config/scenes/ITMonitor.json

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+{
+    "name": "ITMonitor",
+    "current_scene": "Screen Capture",
+    "current_program_scene": "Screen Capture",
+    "scene_order": [
+        { "name": "Screen Capture" }
+    ],
+    "sources": [
+        {
+            "id": "monitor_capture",
+            "name": "Primary Display",
+            "versioned_id": "monitor_capture",
+            "settings": {
+                "capture_cursor": true,
+                "compatibility": false,
+                "force_sdr": false,
+                "monitor": 0
+            },
+            "mixers": 0,
+            "sync": 0,
+            "flags": 0,
+            "volume": 1.0,
+            "balance": 0.5,
+            "enabled": true,
+            "muted": true,
+            "push-to-mute": false,
+            "push-to-mute-delay": 0,
+            "push-to-talk": false,
+            "push-to-talk-delay": 0,
+            "hotkeys": {},
+            "deinterlace_field_order": 0,
+            "deinterlace_mode": 0,
+            "filter_data": [],
+            "filters": []
+        },
+        {
+            "id": "scene",
+            "name": "Screen Capture",
+            "versioned_id": "scene",
+            "settings": {
+                "id_counter": 1,
+                "custom_size": false,
+                "items": [
+                    {
+                        "name": "Primary Display",
+                        "visible": true,
+                        "locked": false,
+                        "rot": 0.0,
+                        "pos": { "x": 0.0, "y": 0.0 },
+                        "scale": { "x": 1.0, "y": 1.0 },
+                        "align": 5,
+                        "bounds_type": 0,
+                        "bounds_align": 0,
+                        "bounds": { "x": 0.0, "y": 0.0 },
+                        "crop_top": 0,
+                        "crop_right": 0,
+                        "crop_bottom": 0,
+                        "crop_left": 0,
+                        "group_item_backup": false,
+                        "scale_filter": "disable",
+                        "blend_method": "default",
+                        "blend_type": "normal",
+                        "show_transition": { "id": "" },
+                        "hide_transition": { "id": "" }
+                    }
+                ]
+            },
+            "mixers": 0,
+            "sync": 0,
+            "flags": 0,
+            "volume": 1.0,
+            "balance": 0.5,
+            "enabled": true,
+            "muted": false,
+            "push-to-mute": false,
+            "push-to-mute-delay": 0,
+            "push-to-talk": false,
+            "push-to-talk-delay": 0,
+            "hotkeys": {
+                "OBSBasic.SelectScene": []
+            },
+            "deinterlace_field_order": 0,
+            "deinterlace_mode": 0,
+            "filter_data": [],
+            "filters": []
+        }
+    ],
+    "groups": [],
+    "transitions": [
+        {
+            "id": "fade_transition",
+            "name": "Fade",
+            "settings": { "duration": 300 },
+            "hotkeys": {}
+        }
+    ],
+    "current_transition": "Fade",
+    "transition_duration": 300,
+    "preview_locked": false,
+    "scaling_enabled": false,
+    "scaling_level": 1,
+    "scaling_off_x": 0.0,
+    "scaling_off_y": 0.0
+}

scripts/Invoke-ReplaySave.ps1

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+#Requires -Version 5.1
+<#
+.SYNOPSIS
+    Sends a SaveReplayBuffer request to OBS via WebSocket v5 (built into OBS 28+).
+    Returns $true on success, $false on any failure.
+
+.PARAMETER Port
+    OBS WebSocket port. Defaults to the value in config.psd1.
+#>
+
+param(
+    [int]$Port = 0
+)
+
+$ErrorActionPreference = 'SilentlyContinue'
+
+if ($Port -eq 0) {
+    $config = Import-PowerShellDataFile -Path (Join-Path $PSScriptRoot '..\config.psd1')
+    $Port   = $config.WebSocketPort
+}
+
+$ws  = $null
+$cts = $null
+
+try {
+    $ws  = New-Object System.Net.WebSockets.ClientWebSocket
+    $cts = New-Object System.Threading.CancellationTokenSource(5000)  # 5-second timeout
+    $uri = [System.Uri]"ws://localhost:$Port"
+
+    $ws.ConnectAsync($uri, $cts.Token).Wait()
+
+    $buffer = New-Object byte[] 8192
+
+    # Receive Hello (opcode 0)
+    $null = $ws.ReceiveAsync($buffer, $cts.Token).Result
+
+    # Send Identify (opcode 1) — no authentication
+    $identify = [System.Text.Encoding]::UTF8.GetBytes('{"op":1,"d":{"rpcVersion":1}}')
+    $ws.SendAsync($identify, [System.Net.WebSockets.WebSocketMessageType]::Text, $true, $cts.Token).Wait()
+
+    # Receive Identified (opcode 2)
+    $null = $ws.ReceiveAsync($buffer, $cts.Token).Result
+
+    # Send SaveReplayBuffer request (opcode 6)
+    $request = [System.Text.Encoding]::UTF8.GetBytes('{"op":6,"d":{"requestType":"SaveReplayBuffer","requestId":"itrecord-1"}}')
+    $ws.SendAsync($request, [System.Net.WebSockets.WebSocketMessageType]::Text, $true, $cts.Token).Wait()
+
+    # Receive RequestResponse (opcode 7)
+    $null = $ws.ReceiveAsync($buffer, $cts.Token).Result
+
+    $ws.CloseAsync([System.Net.WebSockets.WebSocketCloseStatus]::NormalClosure, 'Done', $cts.Token).Wait()
+
+    return $true
+}
+catch {
+    return $false
+}
+finally {
+    if ($ws)  { $ws.Dispose() }
+    if ($cts) { $cts.Dispose() }
+}

scripts/Show-ReplayTray.ps1

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+#Requires -Version 5.1
+<#
+.SYNOPSIS
+    System tray icon that lets users trigger an OBS replay buffer save.
+    Right-click the tray icon to access Save Replay or Exit.
+
+.NOTES
+    This script blocks (runs a WinForms message loop) — launch it via Start-Process.
+    Start-OBSReplayBuffer.ps1 handles launching this automatically at logon.
+#>
+
+Add-Type -AssemblyName System.Windows.Forms
+Add-Type -AssemblyName System.Drawing
+
+$saveScript = Join-Path $PSScriptRoot 'Invoke-ReplaySave.ps1'
+
+# --- Tray icon ---
+$tray         = New-Object System.Windows.Forms.NotifyIcon
+$tray.Icon    = [System.Drawing.SystemIcons]::Shield
+$tray.Text    = 'IT Screen Recorder'
+$tray.Visible = $true
+
+# --- Context menu ---
+$menu     = New-Object System.Windows.Forms.ContextMenuStrip
+$saveItem = New-Object System.Windows.Forms.ToolStripMenuItem('Save Replay')
+$sep      = New-Object System.Windows.Forms.ToolStripSeparator
+$exitItem = New-Object System.Windows.Forms.ToolStripMenuItem('Exit')
+
+$saveItem.Add_Click({
+    $saveItem.Enabled = $false
+    $saveItem.Text    = 'Saving...'
+
+    $result = & powershell.exe -ExecutionPolicy Bypass -NonInteractive -File $saveScript
+
+    if ($result -eq $true) {
+        $tray.ShowBalloonTip(4000, 'IT Screen Recorder', 'Replay saved.', [System.Windows.Forms.ToolTipIcon]::Info)
+    }
+    else {
+        $tray.ShowBalloonTip(4000, 'IT Screen Recorder', 'Could not save replay. Please contact the helpdesk.', [System.Windows.Forms.ToolTipIcon]::Error)
+    }
+
+    $saveItem.Text    = 'Save Replay'
+    $saveItem.Enabled = $true
+})
+
+$exitItem.Add_Click({
+    $tray.Visible = $false
+    [System.Windows.Forms.Application]::Exit()
+})
+
+$menu.Items.Add($saveItem) | Out-Null
+$menu.Items.Add($sep)      | Out-Null
+$menu.Items.Add($exitItem) | Out-Null
+
+$tray.ContextMenuStrip = $menu
+
+# --- Message loop (blocks until Exit is chosen) ---
+[System.Windows.Forms.Application]::Run()
+
+$tray.Dispose()

scripts/Start-OBSReplayBuffer.ps1

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+#Requires -Version 5.1
+<#
+.SYNOPSIS
+    Launches OBS Studio hidden with the replay buffer running, then starts the tray icon.
+    Intended to be called by DEM as a logon task (fire and forget — do not wait for completion).
+
+.NOTES
+    Reads settings from config.psd1 one level above this script.
+    Writes the OBS profile basic.ini dynamically so the correct UNC path and buffer
+    duration are baked in at session start.
+#>
+
+$ErrorActionPreference = 'Stop'
+
+$configPath = Join-Path $PSScriptRoot '..\config.psd1'
+$config     = Import-PowerShellDataFile -Path $configPath
+
+# --- Skip if OBS is already running (handles reconnect scenarios) ---
+if (Get-Process -Name 'obs64' -ErrorAction SilentlyContinue) {
+    exit 0
+}
+
+# --- Create user capture subfolder on UNC share ---
+$userCapturePath = Join-Path $config.UNCPath $env:USERNAME
+if (-not (Test-Path -Path $userCapturePath)) {
+    New-Item -ItemType Directory -Path $userCapturePath -Force | Out-Null
+}
+
+# --- Detect primary monitor resolution ---
+Add-Type -AssemblyName System.Windows.Forms
+$screen = [System.Windows.Forms.Screen]::PrimaryScreen
+$width  = $screen.Bounds.Width
+$height = $screen.Bounds.Height
+
+# --- Write OBS profile (basic.ini) ---
+$profileDir = "$env:APPDATA\obs-studio\basic\profiles\$($config.ProfileName)"
+New-Item -ItemType Directory -Path $profileDir -Force | Out-Null
+
+@"
+[General]
+Name=$($config.ProfileName)
+
+[Output]
+Mode=Simple
+FilenameFormatting=%CCYY-%MM-%DD_%hh-%mm-%ss
+
+[SimpleOutput]
+FilePath=$userCapturePath
+RecFormat2=mkv
+RecQuality=HQ
+RecRBTime=$($config.BufferSeconds)
+RecRBSize=512
+
+[Video]
+BaseCX=$width
+BaseCY=$height
+OutputCX=$width
+OutputCY=$height
+FPSType=1
+FPSNum=30
+FPSDen=1
+ScaleType=bicubic
+ColorFormat=NV12
+ColorSpace=709
+ColorRange=Partial
+"@ | Set-Content -Path "$profileDir\basic.ini" -Encoding UTF8
+
+# --- Launch OBS hidden ---
+$obsArgs = @(
+    '--minimize-to-tray'
+    '--startreplaybuffer'
+    '--disable-updater'
+    "--profile `"$($config.ProfileName)`""
+    "--collection `"$($config.SceneCollection)`""
+)
+
+Start-Process -FilePath $config.OBSExecutable -ArgumentList $obsArgs -WindowStyle Hidden
+
+# --- Launch tray icon as a separate background process ---
+$trayScript = Join-Path $PSScriptRoot 'Show-ReplayTray.ps1'
+Start-Process -FilePath 'powershell.exe' -ArgumentList @(
+    '-ExecutionPolicy', 'Bypass'
+    '-NonInteractive'
+    '-WindowStyle', 'Hidden'
+    '-File', $trayScript
+) -WindowStyle Hidden