gramps 4fcf76289c TASK 48 item 1: bundle ffmpeg — the app no longer downloads an executable
Store policy 10.2.2 forbids dynamic code inclusion, and this was the only
third-party binary the app ever downloaded and ran. It had already failed in
production: the pin aged out of BtbN's 14-day retention and the download 404'd
on the creator's first real recording attempt (2026-09-01). Bundling kills
that failure class permanently and deletes the startup network dependency.

- scripts/fetch-ffmpeg.sh populates a gitignored ./ffmpeg from a pinned
  month-end BtbN LGPL-shared artifact, SHA-256 verified before extraction,
  idempotent, FFMPEG_ZIP= override. 135 MB of DLLs in git would tax every
  commit on this 9p tree; the URL + hash are the audit trail LGPL §6 wants.
- ytLive.csproj copies ffmpeg\** to output and publish (Always), and a
  GuardBundledFfmpeg target fails the BUILD if the folder is missing, so a
  fresh clone finds out before a take rather than during one.
- FfmpegLocator loses the downloader, the zip extraction and the
  %APPDATA%\ytLlive\tools cache. Order is now bundle -> PATH, deliberately
  inverted: a PATH ffmpeg may be a different major version or a GPL build,
  and the bundle is what was pinned, license-vetted and tested. A missing
  bundle throws loudly; the old "found something on disk" path could satisfy
  a missing bundle with a stale copy, and silent drift is the worst failure
  mode for a dependency certification inspects.
- ffplay.exe (18 MB) is not shipped; nothing calls it.
- THIRD-PARTY-NOTICES.txt: "downloads" -> "bundled" throughout, and the stale
  build tag autobuild-2026-08-09-13-03 — the tag that 404'd — corrected to
  autobuild-2026-08-31-13-27 with the exact artifact name and archive hash.
  OpenH264 made precise: compiled INTO avcodec-63.dll, no separate binary.

Checked whether other third-party binaries needed bundling: no. e_sqlite3.dll
and WebView2Loader.dll already ship via NuGet into runtimes\win-x64\native\,
OpenH264 is inside avcodec-63.dll, the rest are managed. Two gaps remain that
bundling cannot fix, recorded in the map: the WebView2 Evergreen runtime is a
machine prerequisite (TASK 48 item 2), and Velopack's updater downloads and
executes, so its teardown is a compliance action.

Tests: 16 locator facts, suite 379/379, 0 warnings. The integration test runs
the bundled ffmpeg -version, which is the only assertion that proves the
sibling libav*.dll resolved — presence checks pass with the DLLs missing and a
shared build then fails to start. TheLocatorCarriesNoNetworkCapability keeps
10.2.2 from rotting back.

Analysis: TASKS/research-store-certification.md §4.
2026-09-28 09:38:21 -07:00

ytLlive

LlamaCasty — livestream smarter

A creator-proof live-streaming and recording app for YouTube — native Windows (C# / WPF / .NET 8).

Screenshot

ytLlive — main window with scenes, sources, and live preview

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.

S
Description
Creator-proof live-streaming and recording app for YouTube — native Windows (C# / WPF / .NET 8). One-click go-live, visual scene building.
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