- Add ElementKind (Static/Dynamic) to SceneElement base; Source/WebcamSceneConfig classify - Services/SceneGraph.cs: owns the Scenes collection (ViewModel's Scenes delegates to it), the element mutation surface (Add/Insert/Remove/Move, each invalidating the bake), and the queries that were scattered LINQ (GetBackground/GetWebcam/GetChatBoxes/GetSplitPoint/IsStatic) - SceneCompositor: split-aware BakeStaticBase + CompositeLayers + Render(.., staticBase, split); builds/caches the static base below the split point in source-rect space - FramePump: optional SceneGraph -> optimized bake+composite path; falls back to full render - MainViewModel: routes element mutations through the graph; invalidates the bake on static layout/opacity/visibility/useDefaultBackground changes and after background heal/Ensure - Integration test SceneGraphTests.BakedStaticBase_WithDynamicLayer_CompositesCorrectly Derivative survey (mandated): tried before writing — OBS does per-source opacity/visibility caching and static-scene baking; this mirrors OBS's 'cached static source' optimization. 3 documented defensive deviations from the spec (ChatOverlayLayer stays decoupled; background helpers stay VM-static for direct testability; full facade peel deferred post-1.0) in TASKS.md + ai.md. Scope check passed; clean build 0 warnings.
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.
Run
dotnet build # Windows only — WPF
dotnet run
Version Roadmap
| Version | Scope |
|---|---|
| v0.1 | Scene/source management, YouTube RTMP ingest, YouTube OAuth2, live chat, stream health |
| v0.2 | Recording to local file |
| v0.3 | Stream scheduling |
| v0.4 | Multi-destination restreaming |
| 1.0 | General availability |
Structure
| Path | Role |
|---|---|
Models/ |
Scene, Source, QualityOption, StreamConfig, StreamHealth, YouTube channel/chat, Socials (social bar) |
ViewModels/ |
MainViewModel — scenes, stream controls, chat; GoLiveViewModel, ReuseImageViewModel, SocialsDialogViewModel |
Services/ |
YouTubeAuthService (OAuth2), YouTubeStreamService (broadcast/health), YouTubeChatService (chat polling), LayoutStore (SQLite), SocialValidator (social link/fediverse validation + nodeinfo icon resolution) |
Helpers/ |
ViewModelBase, RelayCommand, ImageCache, AppLog, FocusPreservingListBox, OAuthCredentials |
Themes/ |
Controls.xaml — the dark-theme control styles, merged once in App.xaml |
MainWindow.xaml |
Dark-theme main UI: scene/source panel, preview, chat, status bar |
SocialsDialog.xaml |
Social Media Site Promotion dialog — 6-slot social bar editor with sign-in gate and validation |
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.

