Per-Participant NDI ISO Controller for Microsoft Teams. Receives Teams NDI streams, normalizes framerate/resolution, and re-emits clean ISO outputs for live production switchers (vMix, OBS, Ross). Wild Dragon LLC.
Zac Gaetano
c53c7a7768
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The DataGrid's per-row audio level bar (in the Live column) was inert because IsoHealthStats.PeakAudioLevel always returned 0.0. Engine work needed: capture NDI audio frames, compute peak amplitude, publish through the existing stats path. Engine: - AudioPeakComputer (new): max-abs computation across NDI's FLTP / FLT / PCM s16 sample formats. Pure managed code, fully unit-tested (14 cases — clamping behaviour, edge cases like short.MinValue overflow, totalSamples-vs-buffer mismatch defenses). - INdiInterop.CaptureAudioPeak (new, default-implemented): polls one audio frame, returns peak in [0,1] or null on timeout. FakeNdiInterop inherits the no-op default; production NdiInteropPInvoke overrides with real FLTP decode through a sibling RecvCaptureV3Audio import + RecvFreeAudioV3. - NdiNative: AudioFrameV3 struct + audio-only RecvCaptureV3 binding + FreeAudioV3. - NdiReceiver: spins up a sibling audio-capture loop alongside the existing video loop on the same lifetime. Audio failures are caught + logged but never re-thrown (a misbehaving audio path must never tear down the live video pipeline). Latest peak published via Volatile<long> (BitConverter int64 bits) so UI reads are torn-free across threads. - IsoPipeline.GetStats: surfaces NdiReceiver.LatestAudioPeak as IsoHealthStats.PeakAudioLevel. UI: - ParticipantViewModel.OnStatsTick already had the decay logic (max-of-new-or-decayed-old, 0.7 multiplier) waiting for real values. No UI changes needed. Tests: 14 new + 141 existing = 155/155 passing. 0 warnings, 0 errors. |
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| .forgejo/workflows | ||
| docs | ||
| installer | ||
| src | ||
| .editorconfig | ||
| .gitignore | ||
| build-and-test.ps1 | ||
| CHANGELOG.md | ||
| commit-and-push.ps1 | ||
| coverlet.runsettings | ||
| Directory.Build.props | ||
| README.md | ||
| TeamsISO.Linux.slnf | ||
| TeamsISO.sln | ||
| TeamsISO.Windows.slnf | ||
TeamsISO
Per-Participant NDI ISO Controller for Microsoft Teams.
TeamsISO sits between Microsoft Teams' raw NDI broadcast output and a live-production environment. It receives each participant's NDI stream, normalizes framerate / resolution / aspect / audio per a configured target, and re-emits clean, individually-addressable NDI sources for ingestion into a switcher (vMix, OBS, Ross, hardware capture).
What it does
- Discovers participants as Teams broadcasts each one over NDI, surfacing the operator-friendly display name (handles current "MS Teams - Name" format and the legacy "(Teams) Name" format).
- Normalizes feeds to a consistent framerate, resolution, aspect mode, and audio routing — so the downstream switcher gets predictable inputs regardless of what each participant's webcam is doing.
- Routes per-participant as separate NDI sources with a configurable
output-name template (
TEAMSISO_{name},{guid},{machine},{timestamp}tokens). - Records each ISO to disk simultaneously — raw BGRA + sidecar manifest.json
- ffmpeg convert.cmd — so post-production gets a clean per-guest archive.
- Embeds Teams orchestration: launch and stop Teams from the rail, hide Teams' UI windows during a show, drive in-call controls (mute, camera, share, leave, raise hand) via UIAutomation.
- Operator presets save the current per-participant ISO assignment and custom output names, applicable on next launch automatically.
- Live preview thumbnails per participant in the participants table, plus pop-out floating preview windows (right-click → Open preview…) for multi-monitor monitoring.
- External control surface — REST + WebSocket on
127.0.0.1:9755and OSC on UDP127.0.0.1:9000for Bitfocus Companion / Stream Deck / TouchOSC integration. Self-contained HTML control panel at/uifor phone-as-controller. - Crash diagnostics wired to a rolling daily Serilog file sink under
%LOCALAPPDATA%\TeamsISO\Logs\. - Update check against
forge.wilddragon.net's release API — manual or silent on launch (throttled to 24h). - Diagnostic bundle export zips logs + config + presets for bug reports.
Status
Pre-1.0. The May 2026 batch is feature-complete; v1.0 cut is gated on
code-signing the MSI and a smoke pass against a real Teams meeting.
See CHANGELOG.md for the [Unreleased] entry.
Build
Requires .NET 8 SDK on Windows (the TeamsISO.App host is net8.0-windows
WPF).
dotnet restore TeamsISO.Windows.slnf
dotnet build TeamsISO.Windows.slnf -c Release
dotnet test TeamsISO.Windows.slnf --filter "Category!=ndi&requires!=ndi"
The shipped helper scripts in the repo root automate this:
pwsh -File .\build-and-test.ps1
pwsh -File .\commit-and-push.ps1
Documentation
- Control surface API — REST + WebSocket + OSC reference with curl recipes and a Companion config example.
- Releasing — tag-push workflow, MSI signing path.
- Architecture spec — design overview.
- Embedded Teams orchestration spec — Phase E roadmap.
Keyboard shortcuts
| Key | Action |
|---|---|
F1 |
Open help / cheat sheet |
Ctrl + M |
Drop a timestamped marker into every active recording |
Ctrl + Shift + S |
Stop every running ISO (emergency) |
Ctrl + R |
Refresh NDI discovery (rebuild finder) |
File locations
| Path | Contents |
|---|---|
%APPDATA%\TeamsISO\config.json |
Engine settings (framerate, NDI groups, etc.) |
%LOCALAPPDATA%\TeamsISO\presets.json |
Saved operator presets + auto-apply preference |
%LOCALAPPDATA%\TeamsISO\Logs\ |
Rolling daily diagnostic logs |
%LOCALAPPDATA%\TeamsISO\Notes\ |
Per-day show-notes markdown files |
%USERPROFILE%\Videos\TeamsISO\<date>\ |
Default recording output |
%APPDATA%\NDI\ndi-config.v1.json |
NDI Access Manager group routing |
License
Proprietary, © Wild Dragon LLC 2026.