Live test session proved the native alert box DID play (the alert ring was the only source in the mix: micLevel/loopLevel 0.000 while peakMix went 0.375->0.733->0.891 after the sim injections) but the app crashed at 11:22:01.301 the moment a REAL message round-tripped through the poller: System.ArgumentException: Must create DependencySource on same Thread as the DependencyObject at ...MS.Internal.Data.DataBindEngine.ProcessCrossThreadRequests() OnMessageReceived ran RefreshAlertPreviews on the MTA poller thread and stamped the WPF-bound VideoImageSource with a WriteableBitmap created there; the binding engine's cross-thread re-bind killed the process. ChatOverlayLayer already marshals this exact seam (Dispatcher.Invoke) - mirror it, guarded for Application.Current null so the pure test seams still run inline. Good Dog test: AlertLayerVideoTests.OnMessageReceived_FromPollerThread_MarshalsPreviewWritesToTheUiThread calls the seam from a raw MTA Thread while the RealApp loop runs, then asserts on the UI thread that the preview bitmap's Dispatcher is the App's (red on the old seam, green on the fix). WPF cross-thread rule recorded in MyMistakes.md. Full suite 320/320, clean build 0 warnings, scope-check green.
ytLlive
A creator-proof live-streaming and recording app for YouTube — native Windows (C# / WPF / .NET 8).
Screenshot
Design Principle
This software is so intuitive that even the most right-brained person can easily intuit and use it.
Every feature is measured against this. One-click go-live, sane YouTube defaults, visual scene building, and no dead ends — every action has a visible outcome.
Why ytLlive
OBS treats YouTube as an afterthought; SLOBS is Twitch-first with YouTube bolted on. ytLlive is designed and dedicated to YouTube livestreaming and recording, and to YouTube's specific quirks.
Account Assumption
ytLlive assumes you already have a YouTube creator account — connecting uses "Sign in with Google" to link that existing account. ytLlive does not create accounts. If you don't have a YouTube channel yet, set one up on YouTube first, then connect it here.
Audio Assumption
ytLlive uses your default microphone and desktop/game output — it never hunts for a device or contends for one. It assumes your audio is already configured and working (default input and output set, not hijacked by another app). Audio issues are a Windows/device matter outside ytLlive's scope: we don't debug, detect, or try to fix them. If it doesn't sound right, fix the system's audio settings first — it's on the OS, not on us.
Run
dotnet build # Windows only — WPF
dotnet run
Version Roadmap
v1 is the finished product (creator ruling, 2026-09-01 — there are no v1.x releases).
Everything still queueing lands in v1; anything not on the feature list is on the closed
"Out of product — permanently" list in TASKS.md — read that page before asking for a feature.
What v1 ships: the five-scene director's control surface, webcam + screen capture, media + web + text sources, chat on-stream, the social bar, mic/desktop audio with auto-duck and TRAX, local recording, variable quality tiers with auto step-down, one-click go-live + scheduling, stream resilience (auto-reconnect inside YouTube's grace, one-click back on air), built-in monetization awareness (reward capture, session reports, YPP journey tracker), Alerts — all free and ungated; the one-time license only removes the branding flash.
Structure
| Path | Role |
|---|---|
Models/ |
Scene, Source, WebcamSceneConfig, SceneElement, SceneCatalog, QualityOption, StreamConfig/Health, chat, Socials, BroadcastMetadata, Music, MicStatus |
ViewModels/ |
MainViewModel (partial classes per area) + dialogs: GoLive, CameraPicker, MicPicker, HotkeyConfig, Socials, LiveBroadcastForm |
Services/ |
YouTube (OAuth, streams/broadcasts, chat polling), LayoutStore (SQLite), capture (camera/screen-capture/media-file via FFmpeg), SceneCompositor + FramePump, FFmpeg encoder + RTMP, audio pipeline (WASAPI loopback + mic, mixer, filters, ducker, limiter, TRAX), SocialValidator, notifications, hotkeys, SceneGraph, ChatOverlayLayer |
Helpers/ |
ViewModelBase, RelayCommand, ImageCache, AppLog, TokenStore (DPAPI), OAuthCredentials, converters |
Themes/ |
Controls.xaml — the dark-theme control styles, merged once in App.xaml |
MainWindow.xaml |
Dark-theme control surface: thumbnails + central preview, two-state left panel (layers/properties ↔ live chat), top bar, footer |
Distribution.md |
GA-time plan: signing, installer, EULA, hardening — executed as TASK 36 |
Docs (memory map)
schema.md defines the conventions; ai.md is the AI/session guide;
TASKS.md is the task queue. Each code directory carries an index.md.

