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TASKS.md reformat: task-list statuses under every task + all lists numbered

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Fix the 4659-char '### Status:' mega-heading that rendered TASK 3's status in
title font through TASK 4. Every task now opens with a TASK-1-style
'### Status:' block using task-list markers (green check = done, empty box =
pending, red check = exception). Converted every remaining bullet list to
numbered lists; added a marker legend at the top; corrected TASK 4
requirement 2's stale binary facts (static -> lgpl-shared, extract exe + the
libav*.dll family).
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Llama Chile Shop
2026-08-10 11:18:37 -07:00
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commit cc3b1c9234
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TASKS.md
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@@ -3,15 +3,20 @@
> Task queue and authoritative research. Memory-map conventions: [`schema.md`](schema.md);
> architecture/decisions: [`ai.md`](ai.md). Update statuses here whenever a task moves.
> **Checklist markers** — every task's Status list uses the same states:
> 1. ✅ — completed (green check)
> 2. ☐ — not completed / pending (empty box)
> 3. ❌ — exception (blocked, known-issue, or deliberately excluded from this build)
## YouTube Live API — research facts (authoritative, v3 build)
Lifecycle: `created → ready → [testing] → live → complete` (transitional `liveStarting` / `testStarting`).
- **liveBroadcasts.insert** requires: `snippet.title`, `snippet.scheduledStartTime`, `status.privacyStatus`, `status.selfDeclaredMadeForKids` (COPPA).
- **liveStreams.insert** requires: `snippet.title`, `cdn.frameRate`, `cdn.ingestionType`, `cdn.resolution`. **None of the four (except title) can ever change after creation** — changing them means delete + recreate the stream. This is the hard constraint behind the quality grey-out.
- **Title / description / privacy**: editable at any time, including while live (`liveBroadcasts.update`, part=`snippet,status`).
- **contentDetails** (DVR, recordFromStart, monitorStream, embed, latency): editable only in `created` / `ready`.
- **Transition to live** only allowed when the bound stream's `status.streamStatus == active`.
1. **liveBroadcasts.insert** requires: `snippet.title`, `snippet.scheduledStartTime`, `status.privacyStatus`, `status.selfDeclaredMadeForKids` (COPPA).
2. **liveStreams.insert** requires: `snippet.title`, `cdn.frameRate`, `cdn.ingestionType`, `cdn.resolution`. **None of the four (except title) can ever change after creation** — changing them means delete + recreate the stream. This is the hard constraint behind the quality grey-out.
3. **Title / description / privacy**: editable at any time, including while live (`liveBroadcasts.update`, part=`snippet,status`).
4. **contentDetails** (DVR, recordFromStart, monitorStream, embed, latency): editable only in `created` / `ready`.
5. **Transition to live** only allowed when the bound stream's `status.streamStatus == active`.
### Two features that reshape the design
@@ -20,17 +25,17 @@ Lifecycle: `created → ready → [testing] → live → complete` (transitional
### Compliance gotchas (maps perfectly to report-by-exception)
- `liveStreams.status.healthStatus`: `good | ok | bad | noData` plus `configurationIssues[]` with `type` + `severity` (`info|warning|error`). Literally built for report-by-exception — poll it, render nothing on good/ok, surface a banner only on warning/error. No need to invent our own health logic.
- Encoder must comply or YouTube flags it: keyframes ≤ 4s (`gopSizeLong`), closed GOP, H.264, audio AAC/MP3 @ 44.1/48kHz, mono/stereo only.
- Error codes to handle: `errorStreamInactive`, `invalidTransition`, `redundantTransition`, `liveStreamDeletionNotAllowed`, `liveStreamModificationNotAllowed`, `liveBroadcastBindingNotAllowed`.
1. `liveStreams.status.healthStatus`: `good | ok | bad | noData` plus `configurationIssues[]` with `type` + `severity` (`info|warning|error`). Literally built for report-by-exception — poll it, render nothing on good/ok, surface a banner only on warning/error. No need to invent our own health logic.
2. Encoder must comply or YouTube flags it: keyframes ≤ 4s (`gopSizeLong`), closed GOP, H.264, audio AAC/MP3 @ 44.1/48kHz, mono/stereo only.
3. Error codes to handle: `errorStreamInactive`, `invalidTransition`, `redundantTransition`, `liveStreamDeletionNotAllowed`, `liveStreamModificationNotAllowed`, `liveBroadcastBindingNotAllowed`.
### Tips we should take advantage of
- **Reusable streams** (`isReusable=true`): one stream per channel, cache its ingestion URL + stream name, reuse for every broadcast. No rebinding dance each go-live. This is exactly the manual-stream-key baseline.
- **Backup ingestion address**: YouTube provides a simultaneous-push backup — future hardening, not v1.
- **`recordFromStart` + `enableDvr` default true** → every live is auto-recorded and immediately replayable. Free VOD archive, matches the v0.2 recording goal.
- **`latencyPreference`: `normal | low | ultraLow`** — for homelab streamers talking to chat, `low` (or `ultraLow`, capped at 1080p) is a real feature.
- **Broadcast ID == Video ID** — one ID to track everything.
1. **Reusable streams** (`isReusable=true`): one stream per channel, cache its ingestion URL + stream name, reuse for every broadcast. No rebinding dance each go-live. This is exactly the manual-stream-key baseline.
2. **Backup ingestion address**: YouTube provides a simultaneous-push backup — future hardening, not v1.
3. **`recordFromStart` + `enableDvr` default true** → every live is auto-recorded and immediately replayable. Free VOD archive, matches the v0.2 recording goal.
4. **`latencyPreference`: `normal | low | ultraLow`** — for homelab streamers talking to chat, `low` (or `ultraLow`, capped at 1080p) is a real feature.
5. **Broadcast ID == Video ID** — one ID to track everything.
---
@@ -39,11 +44,12 @@ Lifecycle: `created → ready → [testing] → live → complete` (transitional
**Goal:** Working C# / WPF project with MVVM architecture, dark-theme main window, and YouTube service stubs.
### Status: ✅ Done
- Models: Scene, Source, StreamConfig, StreamHealth, YouTubeChannel, ChatMessage
- Services: YouTubeAuthService (OAuth2), YouTubeStreamService (broadcast/health), YouTubeChatService (chat polling)
- MainViewModel: scene management, stream controls, chat
- MainWindow: scene/source panel, preview area, chat panel, status bar
- Clean build, 0 warnings (WSL + Windows)
1. ✅ Models: Scene, Source, StreamConfig, StreamHealth, YouTubeChannel, ChatMessage
2. ✅ Services: YouTubeAuthService (OAuth2), YouTubeStreamService (broadcast/health), YouTubeChatService (chat polling)
3. ✅ MainViewModel: scene management, stream controls, chat
4. ✅ MainWindow: scene/source panel, preview area, chat panel, status bar
5. ✅ Clean build, 0 warnings (WSL + Windows)
---
@@ -51,6 +57,15 @@ Lifecycle: `created → ready → [testing] → live → complete` (transitional
**Goal:** Fully working Google OAuth2 flow — user clicks "YouTube", browser opens, authorization callback lands, channel info is stored.
### Status: ✅ Done
1. ✅ Two-state Start/End Stream button, go-live dialog (account + title/description/visibility), red top bar, pulsing LIVE badge + elapsed timer, preview glow, taskbar red dot
2. ✅ Real OAuth2 wiring — baked-in Google credentials (desktop client; loopback callback) + `YouTubeAuthService` complete: browser launch, `HttpListener` callback, token exchange, refresh, channel fetch
3. ✅ Token persistence via Windows DPAPI (`Helpers/TokenStore.cs` → `%APPDATA%\ytLlive\ytLlive.auth`), best-effort reload + proactive refresh at startup, saved after every exchange/refresh
4. ✅ Account sign-in/change surfaced in the GoLive dialog (saved account shown with "Change Account"; "Sign in to YouTube" when none; Start disabled until signed in)
5. ✅ **End Livestream signs out** — a graceful end completes the session: `StopStream()` calls `YouTubeAuthService.ClearSession()` + `TokenStore.Clear()` + `IsConnected = false`, so the next Start Stream dialog requires a fresh sign-in. A crash never runs End, so the DPAPI token survives and the creator stays signed in. Resume/reconnect after a midstream crash is deliberately deferred to TASK 3: the socket can't be resumed (it dies with the process), so "resume" = fast reconnect with a saved broadcast ID/stream key within YouTube's disconnect-grace window; too slow and `enableAutoStop` ends the broadcast
6. ✅ Tests in `ytLive.Tests` (xUnit, net8.0-windows): TokenStore DPAPI roundtrip/corrupt/missing/clear + mocked exchange channel-parse + refresh expiry bump + `ClearSession` — 7 passing
**Design constraint:** Sign-in must NEVER block core exploration. Users can build scenes, add sources, and audition the software without authenticating. But **going live requires authentication** — the "Start Stream" dialog is where the account sign-in lives, alongside all stream metadata.
**Two-state flow:** There is no separate "Connect" button. The top bar shows a single button — **Start Stream** when idle, **End Stream** when live. Clicking Start Stream opens one dialog that supplies everything: account (previously-saved account shown as default, with a Change Account action) + title/description/visibility.
@@ -68,17 +83,9 @@ Lifecycle: `created → ready → [testing] → live → complete` (transitional
### Tests:
- Mock token exchange response, verify channel info parsed
- Verify token refresh triggers when near expiry
- Verify credential load/save roundtrip
### Status: ✅ Complete
- ✅ Two-state Start/End Stream button, go-live dialog (account + title/description/visibility), red top bar, pulsing LIVE badge + elapsed timer, preview glow, taskbar red dot
- ✅ Real OAuth2 wiring — baked-in Google credentials (desktop client; loopback callback) + `YouTubeAuthService` complete: browser launch, `HttpListener` callback, token exchange, refresh, channel fetch
- ✅ Token persistence via Windows DPAPI (`Helpers/TokenStore.cs` → `%APPDATA%\ytLlive\ytLlive.auth`), best-effort reload + proactive refresh at startup, saved after every exchange/refresh
- ✅ Account sign-in/change surfaced in the GoLive dialog (saved account shown with "Change Account"; "Sign in to YouTube" when none; Start disabled until signed in)
- ✅ **End Livestream signs out** — a graceful end completes the session: `StopStream()` calls `YouTubeAuthService.ClearSession()` + `TokenStore.Clear()` + `IsConnected = false`, so the next Start Stream dialog requires a fresh sign-in. A crash never runs End, so the DPAPI token survives and the creator stays signed in. Resume/reconnect after a midstream crash is deliberately deferred to TASK 3: the socket can't be resumed (it dies with the process), so "resume" = fast reconnect with a saved broadcast ID/stream key within YouTube's disconnect-grace window; too slow and `enableAutoStop` ends the broadcast
- ✅ Tests in `ytLive.Tests` (xUnit, net8.0-windows): TokenStore DPAPI roundtrip/corrupt/missing/clear + mocked exchange channel-parse + refresh expiry bump + `ClearSession` — 7 passing
1. Mock token exchange response, verify channel info parsed
2. Verify token refresh triggers when near expiry
3. Verify credential load/save roundtrip
---
@@ -86,6 +93,27 @@ Lifecycle: `created → ready → [testing] → live → complete` (transitional
**Goal:** Real video preview in the center panel — the minimal source set below, composited per scene.
### Status: 🔶 In progress
1. ✅ **Milestone 1 — webcam** — MediaCapture (WinRT SDK projection) with device enumeration, CPU-first frame source, refcounted `CameraManager`, picker dialog, clip shapes (Traditional + Round) + mirror, 480×270 default placement — schema v2
2. ✅ **Schema v3 (Ship Branch A)** — multi-scene webcam (singleton `Webcam` + per-scene `WebcamSceneConfig`), right-click border/context menu, static OBS-style borders, 50%-per-dimension webcam size cap, device-swap (`ReleaseAllAsync`) — 25 tests passing
3. ✅ **Schema v4** — round→rect restore persisted (`WebcamSceneConfig.RectWidth`/`RectHeight`) + one-time legacy-square 16:9 heal on load
4. ✅ **Screen backdrop (ship task #1, schema v5)** — live desktop/game capture as a permanent, non-deletable bottom layer (`Source.IsBackdrop`), auto-detecting the full-screen game at launch/focus (else the **primary display** — never assumed monitor 0) via `Win32FullScreenDetector` (now with `GetDisplays()`/`PrimaryMonitorIndex()` for the in-app display picker), content re-designated via the OS `GraphicsCapturePicker` ("Change Capture…") or the in-app "Capture Display" submenu, refcounted/shared capture sessions in `ScreenCaptureManager` mirroring `CameraManager` — 45 tests passing
5. ✅ **Schema v6 — backdrop Live-only by policy** — `Scene.HasBackdrop`, enforced by scene name on every load (`EnforceBackdropPolicy`: Starting/BRB/Chat/Ending never carry one; the one-time v5→v6 backfill covers all four), the scene context-menu "Backdrop" checkbox is gone (policy owns the flag), preview watermark hides when the backdrop renders, capture changed to `WindowsRuntimeMarshal.TryGetDataUnsafe` (the CsWinRT-safe frame-read) + downscale to the 1920×1080 master + 5s-throttled error logging (was flooding `startup.log` with 5 MB of cast errors and burning CPU), round webcam no longer re-rasterizes an `ImageBrush` every frame (Image + EllipseGeometry clip) — the live-mode stutter fix
6. ✅ **The five-scene catalog (`SceneCatalog`)** — Starting/Live/BRB/Chat/Ending is the product — work with less, never more; the (+) button only shows when a canonical scene is missing and re-adds it (its menu lists only the missing ones) — 62 tests passing
7. ✅ **Webcam-after-session-start fix** — a webcam added to a scene after the camera was already running (e.g. Chat) previously rendered a transparent container — `CameraManager.GetPreviewBitmap` + propagation in `AddWebcamToActiveSceneAsync`/`ReacquireWebcam` now hands the running shared frames to any newly added `WebcamSceneConfig` — 65 tests passing
8. ✅ **Chat scene webcam size cap** — raised from 50%-per-dimension (960×540) to half the screen AREA (~1358×764 @16:9, `MaxWebcamWidthFor`/`MaxWebcamHeightFor` keyed by canonical name) so the viewer sees the creator better
9. ✅ **"Add Webcam" always opens the camera picker** — deleting one scene's webcam then re-adding used to resurrect the old camera when another scene still used it — `SwapWebcamIdentityAsync` now swaps the app-wide identity if a different camera is chosen, same path as "Change Webcam…"
10. ✅ **Scenes/sources UI** — add/reorder/rename, image + background overlays with move/resize/opacity/reuse
11. ✅ **Audio UX shipped (UI)** — the bottom-bar footer is now two lines (dropped/duration moved under bitrate/fps), with the mic's sound meter + mute button + volume slider grouped CENTERED on the footer's top line, beneath the preview panel (meter: 288px, muted slate track with ruler graduations + muted yellow/red zone tints, green→yellow→red fill; mute = speaker icon → red do-not-symbol when muted, and the slider and speaker stay in sync (volume 0 ⇔ muted — sliding off flips the speaker to muted, sliding up from 0 clears it); mic volume defaults to 80%, muting zeroes the meter and restores the prior volume on unmute (which flashes the meter to the restored position ~300ms before it returns to the live level); the meter is a READ-ONLY realtime level display (fill = live level × volume — volume is a gain on ambient noise; while the slider is dragged the bar previews the slider position and bounces back to the live level on release, which is 0 with no input — clicking the meter does nothing), clicking the MIC label opens a microphone picker whose chosen source shows left-justified inside the meter bar (fill at 75% opacity so the name + ruler markings show through); slim dimensional slider — gradient track/fill, gloss-sphere thumb; the old flat pink 18px-filled one is gone), everything else on line 2 (bitrate/fps/dropped/duration/health left, quality + gear right) — the creator's only audio control, desktop/game audio is automatic (KISS rule)
12. ✅ The connected YouTube account's avatar/name shows in the top bar next to Start Stream (`SyncConnectedAccount`); the scenes list is content-height now (no dead space before SOURCES)
13. ☐ **Window capture** — absorbed into the Screen picker (no separate source type); dedicated window-as-source work is pending
14. ☐ **Scene compositing** — the D3DImage/MediaElement preview compositor (this task's requirement 5; the output compositor ships as TASK 4 ship step 1)
15. ☐ **Text source** — live text ("Starting soon", "Back in 5", handle, callout)
16. ☐ **Chat box** — YouTube live chat rendered *on* the stream so viewers read along in-video
17. ❌ **Background removal (milestone 2)** — ONNX Runtime + DirectML, MediaPipe Selfie Segmentation — deliberately NOT in this build
18. ☐ **Alerts** — Super Chat / membership / subscribe pop-ins; build after the six; **the one paid feature** (see Monetization in `ai.md`)
### The Minimal Source Set (design decision — do not expand casually)
ytLlive is YouTube-only and 90% of users are casual. OBS's long source list is off-putting; we ship
@@ -107,17 +135,17 @@ Deliberately NOT supported: game capture, browser source, media playlist, VLC, c
### Source memory model (design decision)
- A scene has resources. Resources can be shared across scenes.
- A resource exists exactly once in memory, no matter how many scenes use it (a logo in five
1. A scene has resources. Resources can be shared across scenes.
2. A resource exists exactly once in memory, no matter how many scenes use it (a logo in five
scenes = one loaded bitmap).
- Every resource carries a **catalog of scenes**: one usage entry per scene it appears in, each
3. Every resource carries a **catalog of scenes**: one usage entry per scene it appears in, each
entry dictating that scene's use — placement (X/Y/Width/Height), opacity, z-order, enabled,
scale mode, crop.
- Usages are named `{resourceName}.{sceneName}` — whatever the user named the resource, dot, the
4. Usages are named `{resourceName}.{sceneName}` — whatever the user named the resource, dot, the
scene name: `logo.starting`, `logo.live`, `myPic.brb`. Not a hardcoded "logo".
- A webcam in two scenes = one capture session, two catalog entries.
- Refcount by catalog size: the last usage removed → the resource is disposed and evicted.
- The resource (not a per-scene node) owns everything `IDisposable`.
5. A webcam in two scenes = one capture session, two catalog entries.
6. Refcount by catalog size: the last usage removed → the resource is disposed and evicted.
7. The resource (not a per-scene node) owns everything `IDisposable`.
### Scene transitions (design decision)
@@ -137,14 +165,14 @@ Preview shows the transition too (WYSIWYG). No wipes/slides/LUTs beyond the four
1. **Screen** — Windows.Graphics.Capture (WinRT), enumerate displays/windows, picker
2. **Webcam** — MediaCapture (WinRT SDK projection) with device enumeration — ✅ **milestone 1 done**:
- TFM bumped to `net8.0-windows10.0.19041.0` (app **and** tests) so the WinRT projection resolves from the SDK reference packs — no NuGet package, no capability manifest (unpackaged desktop app)
- `MediaCaptureFrameSource` (CPU-first: `MemoryPreference = Cpu`, BGRA8 via `CreateFrameReaderAsync`), `MediaCaptureCameraEnumerator` (`DeviceInformation.FindAllAsync(DeviceClass.VideoCapture)`)
- `CameraManager`: refcounted by `DeviceId`, one shared `WriteableBitmap` app-wide, dispatcher-coalesced UI updates (~render rate, latest-frame drop), placeholder/`AppLog` + warning on failure
- `CameraPickerDialog` (mirror of `ReuseImageDialog`) — "Searching for cameras…" / list / "No cameras found" states
- One webcam app-wide: Add → Webcam greyed out once one exists ("it's already in your stream" tooltip); persisted `DeviceId` re-acquires after layout load
- Default placement 16:9 **480×270**, bottom-right, 32px margin; drag/resize/selection shared with Image sources
- **Clip shapes: Traditional + Round** (phone view dropped — the 9:16 phone output is the vertical output-crop tier); **mirror**; both persisted in the layout DB (schema v2) and toggled from the source chip
- **Background removal = milestone 2** (ONNX Runtime + DirectML, MediaPipe Selfie Segmentation) — not in this build
1. TFM bumped to `net8.0-windows10.0.19041.0` (app **and** tests) so the WinRT projection resolves from the SDK reference packs — no NuGet package, no capability manifest (unpackaged desktop app)
2. `MediaCaptureFrameSource` (CPU-first: `MemoryPreference = Cpu`, BGRA8 via `CreateFrameReaderAsync`), `MediaCaptureCameraEnumerator` (`DeviceInformation.FindAllAsync(DeviceClass.VideoCapture)`)
3. `CameraManager`: refcounted by `DeviceId`, one shared `WriteableBitmap` app-wide, dispatcher-coalesced UI updates (~render rate, latest-frame drop), placeholder/`AppLog` + warning on failure
4. `CameraPickerDialog` (mirror of `ReuseImageDialog`) — "Searching for cameras…" / list / "No cameras found" states
5. One webcam app-wide: Add → Webcam greyed out once one exists ("it's already in your stream" tooltip); persisted `DeviceId` re-acquires after layout load
6. Default placement 16:9 **480×270**, bottom-right, 32px margin; drag/resize/selection shared with Image sources
7. **Clip shapes: Traditional + Round** (phone view dropped — the 9:16 phone output is the vertical output-crop tier); **mirror**; both persisted in the layout DB (schema v2) and toggled from the source chip
8. **Background removal = milestone 2** (ONNX Runtime + DirectML, MediaPipe Selfie Segmentation) — not in this build
3. **Background / Image / Text** — static sources positioned/scaled/opacity
4. **Chat box** — rendered from the live chat poll (right panel is the same feed, raw)
5. **Scene compositing** — per-scene source layering (z-order = sources list order, top-to-bottom
@@ -155,11 +183,9 @@ Preview shows the transition too (WYSIWYG). No wipes/slides/LUTs beyond the four
`BrandFlashActive`/`BrandFlashTimer` in `MainViewModel`); the encoder output renders the same layer,
and v0.2 local recordings carry it too
7. **Drag/drop placement & reorder** — intuitive, visual (per design principle):
- **Preview:** click-drag a source in the center panel to reposition it; resize via handles
- **Scenes list:** drag rows to reorder scenes
- **Sources list:** drag rows to reorder sources (this *is* the z-order) — implemented
### Status: 🔶 In progress — milestone 1 (webcam) shipped; **schema v3 (Ship Branch A) shipped**: multi-scene webcam (singleton `Webcam` + per-scene `WebcamSceneConfig`), right-click border/context menu, static OSB-style borders, 50%-per-dimension webcam size cap, device-swap (`ReleaseAllAsync`); **schema v4**: round→rect restore persisted (`WebcamSceneConfig.RectWidth`/`RectHeight`) + one-time legacy-square 16:9 heal on load — 25 tests passing; **screen backdrop (ship task #1) shipped**: live desktop/game capture as a permanent, non-deletable bottom layer (`Source.IsBackdrop`, schema v5), auto-detecting the full-screen game at launch/focus (else the **primary display** — never assumed monitor 0) via `Win32FullScreenDetector` (now with `GetDisplays()`/`PrimaryMonitorIndex()` for the in-app display picker), content re-designated via the OS `GraphicsCapturePicker` ("Change Capture…") or the in-app "Capture Display" submenu, refcounted/shared capture sessions in `ScreenCaptureManager` mirroring `CameraManager` — 45 tests passing; **schema v6**: `Scene.HasBackdrop`, now **Live-only by policy** — the backdrop is enforced by scene name on every load (`EnforceBackdropPolicy`: Starting/BRB/Chat/Ending never carry one; the one-time v5→v6 backfill covers all four), the scene context-menu "Backdrop" checkbox is gone (policy owns the flag), preview watermark hides when the backdrop renders, capture changed to `WindowsRuntimeMarshal.TryGetDataUnsafe` (the CsWinRT-safe frame-read) + downscale to the 1920×1080 master + 5s-throttled error logging (was flooding `startup.log` with 5 MB of cast errors and burning CPU), round webcam no longer re-rasterizes an `ImageBrush` every frame (Image + EllipseGeometry clip) — the live-mode stutter fix; **the five-scene catalog (`SceneCatalog`)**: Starting/Live/BRB/Chat/Ending is the product — work with less, never more; the (+) button only shows when a canonical scene is missing and re-adds it (its menu lists only the missing ones); **webcam-after-session-start fix**: a webcam added to a scene after the camera was already running (e.g. Chat) previously rendered a transparent container — `CameraManager.GetPreviewBitmap` + propagation in `AddWebcamToActiveSceneAsync`/`ReacquireWebcam` now hands the running shared frames to any newly added `WebcamSceneConfig` — 62 tests passing; the **Chat scene's webcam size cap** is raised from 50%-per-dimension (960×540) to half the screen AREA (~1358×764 @16:9, `MaxWebcamWidthFor`/`MaxWebcamHeightFor` keyed by canonical name) so the viewer sees the creator better — 65 tests passing; **"Add Webcam" always opens the camera picker** (deleting one scene's webcam then re-adding used to resurrect the old camera when another scene still used it — `SwapWebcamIdentityAsync` now swaps the app-wide identity if a different camera is chosen, same path as "Change Webcam…"); scenes/sources UI (add/reorder/rename, image + background overlays with move/resize/opacity/reuse) built; **audio UX shipped (UI)**: the bottom-bar footer is now two lines (dropped/duration moved under bitrate/fps), with the mic's sound meter + mute button + volume slider grouped CENTERED on the footer's top line, beneath the preview panel (meter: 288px, muted slate track with ruler graduations + muted yellow/red zone tints, green→yellow→red fill; mute = speaker icon → red do-not-symbol when muted, and the slider and speaker stay in sync (volume 0 ⇔ muted — sliding off flips the speaker to muted, sliding up from 0 clears it); mic volume defaults to 80%, muting zeroes the meter and restores the prior volume on unmute (which flashes the meter to the restored position ~300ms before it returns to the live level); the meter is a READ-ONLY realtime level display (fill = live level × volume — volume is a gain on ambient noise; while the slider is dragged the bar previews the slider position and bounces back to the live level on release, which is 0 with no input — clicking the meter does nothing), clicking the MIC label opens a microphone picker whose chosen source shows left-justified inside the meter bar (fill at 75% opacity so the name + ruler markings show through); slim dimensional slider — gradient track/fill, gloss-sphere thumb; the old flat pink 18px-filled one is gone), everything else on line 2 (bitrate/fps/dropped/duration/health left, quality + gear right) — the creator's only audio control, desktop/game audio is automatic (KISS rule); the connected YouTube account's avatar/name shows in the top bar next to Start Stream (`SyncConnectedAccount`); the scenes list is content-height now (no dead space before SOURCES); window capture, compositing, encoding pending
1. **Preview:** click-drag a source in the center panel to reposition it; resize via handles
2. **Scenes list:** drag rows to reorder scenes
3. **Sources list:** drag rows to reorder sources (this *is* the z-order) — implemented
---
@@ -167,17 +193,33 @@ Preview shows the transition too (WYSIWYG). No wipes/slides/LUTs beyond the four
**Goal:** Push encoded video to YouTube's RTMP ingest.
### Status: 🔶 In progress
1. ✅ **Ship step 1 — the output compositor SHIPPED** (2026-08-10)
2. ✅ **Ship step 2 — the FFmpeg locator SHIPPED** (2026-08-10)
3. ☐ **Encoder + RTMP push** — the FFmpeg subprocess: frames via stdin, stderr health parsing, FLV mux + push to the cached reusable stream's ingestion URL
4. ☐ **WASAPI audio capture** — loopback (desktop/game) + the picked mic feeding `AudioLevel` so the realtime meter comes alive (req 7)
5. ☐ **Frame-pipeline wiring** — `CameraManager`/`ScreenCaptureManager` → compositor resolver → encoder
6. ☐ **Health stats** — bitrate, FPS, dropped frames reported live in the bottom bar (req 5)
7. ☐ **One-click go live + private-only enforcement** — Go Live always creates/updates the broadcast with `privacyStatus = "private"` + PRIVATE badge (req 8, test-verifiable)
The pipeline chain the encoder needs doesn't exist yet: **scene compositing** (the master 1920×1080 frame
without the preview's editing chrome) → **audio capture** (WASAPI, feeds the meter) → **H.264+AAC encode**
→ **vertical-tier crop/scale** → **RTMP push** → **health stats** into the bottom bar. Nothing can encode
until a frame source exists, so the compositor is ship step 1. The pipeline is
`CameraManager + ScreenCaptureManager → compositor resolver → compositor → encoder → RTMP`.
### Requirements:
1. **Encoding** — H.264 (hardware via NVENC/AMD, fallback x264) + AAC audio; **must comply**: keyframes ≤ 4s (gopSizeLong), closed GOP, AAC/MP3 @ 44.1/48kHz, mono/stereo only. **License posture (decided): GPL-free build** — NVENC (NVIDIA) / QSV (Intel) / AMF (AMD) + OpenH264 software fallback + built-in AAC; no libx264 (GPL contaminates a paid product). Output containers are identical either way (H.264+AAC in `.flv` for RTMP, `.mp4`/`.ts` for VOD) — the format is NOT the differentiator, the license and per-GPU quality are. **License guardrails (never violate — see `ai.md` → "Licensing — do not violate"):** only BtbN `lgpl`/`lgpl-shared` builds; never GPL (gyan.dev) or `nonfree` (fdk-aac); never static for distribution (LGPL §6 relink material); never link FFmpeg into the app; never drop `THIRD-PARTY-NOTICES.txt` from the app/About screen.
2. **RTMP push** — **FFmpeg subprocess (decided)**: app feeds raw frames via stdin, parses stderr for health; one battle-tested binary does encode + FLV mux + push + reconnect. **Binary distribution (decided): check-then-pull** — probe `where ffmpeg`/PATH at first go-live; if absent, download a **pinned** build (**BtbN LGPL win64 static** zip, ~75 MB — gyan.dev's builds are GPLv3 and ship libx264, which violates the license posture; BtbN's LGPL variant drops x264/x265 while keeping NVENC/QSV/AMF + libopenh264 + native AAC) to `%APPDATA%\ytLlive\tools\ffmpeg.exe` (extract just `ffmpeg.exe` from the zip) and cache it, offline-friendly. Behind an `IFfmpegLocator` seam so tests fake it (ship step 2, below). Push goes to the cached reusable stream's ingestion URL
2. **RTMP push** — **FFmpeg subprocess (decided)**: app feeds raw frames via stdin, parses stderr for health; one battle-tested binary does encode + FLV mux + push + reconnect. **Binary distribution (decided): check-then-pull** — probe `where ffmpeg`/PATH at first go-live; if absent, download a **pinned** build (**BtbN LGPL-shared win64** zip, ~75 MB — gyan.dev's builds are GPLv3 and ship libx264, which violates the license posture; BtbN's LGPL variant drops x264/x265 while keeping NVENC/QSV/AMF + libopenh264 + native AAC) to `%APPDATA%\ytLlive\tools\ffmpeg.exe` (extract `ffmpeg.exe` **plus the `libav*.dll` family**) and cache it, offline-friendly. Behind an `IFfmpegLocator` seam so tests fake it (ship step 2, below). Push goes to the cached reusable stream's ingestion URL
3. **Quality ladder** — the offered tiers, with **1080p60 @ 8 Mbps as the standard/default**:
- 720p30 @ 6 Mbps
- 720p60 @ 6 Mbps
- 1080p30 @ 8 Mbps
- **1080p60 @ 8 Mbps** (default — mainstream ceiling, GPU hardware-encoded so the gaming
1. 720p30 @ 6 Mbps
2. 720p60 @ 6 Mbps
3. 1080p30 @ 8 Mbps
4. **1080p60 @ 8 Mbps** (default — mainstream ceiling, GPU hardware-encoded so the gaming
machine never notices; upload headroom stays comfortable)
- Vertical 1080×1920 @ 60fps @ 8 Mbps (9:16 phone tier)
5. Vertical 1080×1920 @ 60fps @ 8 Mbps (9:16 phone tier)
The composition master is always 1920×1080; a tier is an output rect + target resolution
(see `ai.md` "Resolution tiers"). Vertical output = the centered 607×1080 crop of the master
scaled to 1080×1920 (semi-crop preview is already implemented; the encoder applies the same rect).
@@ -195,13 +237,6 @@ Preview shows the transition too (WYSIWYG). No wipes/slides/LUTs beyond the four
8. **Private-only go live until v1 (reputation guard, decided 2026-08-10)** — until the v1 release, go-live is **locked to private streams only** so a software error can never publish something public/unlisted that damages the creator's reputation. RTMP push itself has no privacy — privacy lives on the YouTube **live broadcast object**, which this app already controls via its OAuth API calls. So the lock is purely API-side: the Go Live flow always creates/updates the broadcast with `privacyStatus = "private"` and a guard **refuses** to set anything else (same spirit as the Live-only backdrop policy). The UI shows a clear "PRIVATE" badge next to the stream state so the creator always knows who can see them. Enforcement must be verifiable in the auth-service tests (fake the broadcast-insert/update call, assert `privacyStatus` is forced to private).
9. **v1 release gate: bundle the full license texts (decided 2026-08-10)** — `THIRD-PARTY-NOTICES.txt` currently links the canonical license texts rather than embedding them. At the **v1 (GA) release**, the full texts of every license it names (LGPL v2.1+, BSD-2-Clause, MIT, Apache-2.0) MUST be bundled alongside it (shipped in the app output, e.g. a `licenses/` folder next to the notices file, still reachable from the About screen). This is a **release blocker for v1, not a task to queue early** — do it in the release pass. The repo should treat this like the private-only go-live gate: a checkbox that cannot silently lapse.
### Status: 🔶 In progress — **ship step 1 (the output compositor) SHIPPED** (2026-08-10); **ship step 2 (the FFmpeg locator) SHIPPED** (2026-08-10); encoder/RTMP/audio follow it
The pipeline chain the encoder needs doesn't exist yet: **scene compositing** (the master 1920×1080 frame
without the preview's editing chrome) → **audio capture** (WASAPI, feeds the meter) → **H.264+AAC encode**
→ **vertical-tier crop/scale** → **RTMP push** → **health stats** into the bottom bar. Nothing can encode
until a frame source exists, so the compositor is ship step 1.
#### Ship step 1 — Scene compositor (the frame source)
**Goal:** a pure-CPU software compositor producing the encoder's master frame (BGRA8, the `VideoFrame`
@@ -225,25 +260,25 @@ vertical (9:16) = composite the centered 607×1080 crop then bilinear-upscale to
2. Background — the scene's `Background` Source, `UniformToFill` full-frame (the `ActiveBackgroundImage`
layer, not per-element).
3. Elements in `Scene.Elements` order (back→front), skip `IsVisible=false`. What actually renders:
- `Source` Type `Image` → static asset, `UniformToFill` cover-crop into (X, Y, W, H)
- `WebcamSceneConfig` → latest frame by `DeviceId`: Traditional = `UniformToFill` rect; Round = circle
1. `Source` Type `Image` → static asset, `UniformToFill` cover-crop into (X, Y, W, H)
2. `WebcamSceneConfig` → latest frame by `DeviceId`: Traditional = `UniformToFill` rect; Round = circle
diameter `min(W,H)` (alpha 0 outside — true circle, not oval); mirror = horizontal flip around
element center (`MirrorScale`); opacity = per-pixel multiply (content + border); border = stroked
rect / centered circle at `RoundBorderSize`, width `BorderWidth`, alpha `BorderOpacity`
- `Background` / `IsBackdrop` / `TextOverlay` are NOT per-element (layers above; Text not shipped)
3. `Background` / `IsBackdrop` / `TextOverlay` are NOT per-element (layers above; Text not shipped)
4. Branding flash — pre-rendered full-frame "made with ytLlive!" at 25% alpha when live +
`BrandFlashEnabled` + timer active. Passed in as a `VideoFrame?` (compositor core stays pure byte-math,
no WPF; likely a bundled asset rather than runtime text rendering).
5. NOT in output (preview chrome only): SelectionOverlay, DimRects, output-rect outline, badge, placeholder.
**New files (all in `Services/Compositor/`):**
- `SceneCompositor.cs` — `Render(Scene, frameFor: Func<SceneElement, VideoFrame?>, flashFrame:
1. `SceneCompositor.cs` — `Render(Scene, frameFor: Func<SceneElement, VideoFrame?>, flashFrame:
VideoFrame?, CompositorOptions) → VideoFrame` (output-sized). The caller's `frameFor` resolver maps
each element to its frame (webcam → DeviceId, image → AssetId via `StaticPixelCache`, backdrop →
CaptureKey) — the compositor stays pure/hermetic/no WPF.
- `CompositorOptions.cs` — source-rect + output W×H.
- `StretchMath.cs` — `UniformToFill` cover-crop, ellipse mask, bilinear scale (pure, unit-tested).
- `StaticPixelCache.cs` — asset `byte[]` → cached BGRA `VideoFrame` (WPF `BitmapDecoder` + `CopyPixels`,
2. `CompositorOptions.cs` — source-rect + output W×H.
3. `StretchMath.cs` — `UniformToFill` cover-crop, ellipse mask, bilinear scale (pure, unit-tested).
4. `StaticPixelCache.cs` — asset `byte[]` → cached BGRA `VideoFrame` (WPF `BitmapDecoder` + `CopyPixels`,
decode once per content hash).
**Test plan (Good Dog Rule — ONE integration test):** `SceneCompositorTests` — a scene with backdrop
@@ -275,30 +310,30 @@ a binary in the repo. Returns an absolute path; downloads only when neither PATH
provides one.
**Decisions (locked 2026-08-10):**
- **BtbN LGPL-shared win64 build** — not gyan.dev (gyan's "essentials" is GPLv3 and ships libx264, which
1. **BtbN LGPL-shared win64 build** — not gyan.dev (gyan's "essentials" is GPLv3 and ships libx264, which
violates requirement 1's license posture) and **not the static lgpl build**: LGPLv2.1 §6 wants
relinkable object files for static linking, but the **shared** (dynamic-DLL) variant sidesteps that —
compliance is "license text + source offer + unmodified binaries" (see `THIRD-PARTY-NOTICES.txt` and
`ai.md` → Licensing). Drops libx264/libx265 while keeping NVENC/QSV/AMF, libopenh264 (the LGPL-legal
H.264 software fallback) and native AAC — exactly the requirement-1 encoder profile.
- **Pinned URL** — `https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2026-08-09-13-03/ffmpeg-master-latest-win64-lgpl-shared.zip`
2. **Pinned URL** — `https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2026-08-09-13-03/ffmpeg-master-latest-win64-lgpl-shared.zip`
(~75 MB zip — earlier "~30 MB" estimate corrected). A dated autobuild tag is immutable; BtbN retention
keeps the last 14 daily builds + each month-end build for 2 years, so a cold cache after retention
expiry 404s — a logged, recoverable failure (the seam throws; the encoder step surfaces it). Once
cached, the URL is never touched again. The pin is a single `const`, bumpable in one place — and must
always stay on the **shared** variant (never `gpl`, `nonfree`, or static; see ai.md Licensing).
- **Check-then-pull order** — (1) PATH probe (the user's own install wins), (2) cached
3. **Check-then-pull order** — (1) PATH probe (the user's own install wins), (2) cached
`%APPDATA%\ytLlive\tools\ffmpeg.exe`, (3) download + extract. Extract `ffmpeg.exe` **plus the
`libav*.dll` family** (the shared build's bin/ folder; Windows resolves the DLLs from the exe's own
directory) into a staging dir then move into place — a crash never leaves a corrupt or partial cache.
- **Seam** — `IFfmpegLocator.LocateAsync(CancellationToken)`: search dirs, tools dir, and the downloader
4. **Seam** — `IFfmpegLocator.LocateAsync(CancellationToken)`: search dirs, tools dir, and the downloader
(`Func<string, CancellationToken, Task<byte[]>>`) are constructor-injected with production defaults, so
tests fake the network (feeding a real in-memory zip) and never touch disk outside a temp dir.
**New files (all in `Services/Encoder/`):**
- `IFfmpegLocator.cs` — the seam.
- `FfmpegLocator.cs` — the impl (PATH probe → cache → pull+extract exe + DLLs), failures logged via `AppLog`.
- `THIRD-PARTY-NOTICES.txt` (repo root) — the LGPL/BSD/MIT notices + source offer, copied to the build
1. `IFfmpegLocator.cs` — the seam.
2. `FfmpegLocator.cs` — the impl (PATH probe → cache → pull+extract exe + DLLs), failures logged via `AppLog`.
3. `THIRD-PARTY-NOTICES.txt` (repo root) — the LGPL/BSD/MIT notices + source offer, copied to the build
output and surfaced via the top-bar **About** button (`MainWindow` code-behind, opens the file in the
OS viewer).
@@ -330,6 +365,14 @@ cache refresh, empty payload, missing zip entry, downloader failure) — **78 pa
**Goal:** Create/bind broadcasts, monitor YouTube-side stream health — the v3 way.
### Status: ⏳ Not started
1. ☐ Broadcast creation — title/description/privacy/scheduledStartTime via API, with the v3 flags above
2. ☐ Reusable stream — create once, cache + reuse; bind to broadcast
3. ☐ Health monitoring — poll `liveStreams.list` `healthStatus` + `configurationIssues[]`, surface banner only on warning/error
4. ☐ Live chat — poll `liveChat/messages`, render in right panel, support Super Chat + membership badges
5. ☐ Error handling — the YouTube error codes: `errorStreamInactive`, `invalidTransition`, `redundantTransition`, `liveStreamDeletionNotAllowed`, `liveStreamModificationNotAllowed`, `liveBroadcastBindingNotAllowed`
### Design decisions (v3)
1. **One-click go-live** — `liveBroadcasts.insert` with `enableAutoStart=true`, `enableAutoStop=true`, `enableMonitorStream=false`, `selfDeclaredMadeForKids=false`, `latencyPreference=low`. No `transition(live)` call, no testing stage, no liveStarting polling. Encoder starts → YouTube brings it live by itself.
@@ -348,14 +391,21 @@ cache refresh, empty payload, missing zip entry, downloader failure) — **78 pa
4. **Live chat** — poll `liveChat/messages`, render in right panel, support Super Chat + membership badges
5. **Error handling** — the YouTube error codes: `errorStreamInactive`, `invalidTransition`, `redundantTransition`, `liveStreamDeletionNotAllowed`, `liveStreamModificationNotAllowed`, `liveBroadcastBindingNotAllowed`
### Status: Not started
---
## TASK 6 — Layout Persistence (SQLite)
**Goal:** Scenes, sources, and asset bytes survive restarts; assets are always available.
### Status: ✅ Done
1. ✅ SQLite database (`Microsoft.Data.Sqlite`) at `%APPDATA%\ytLlive\ytLlive.db`; schema versioned via `PRAGMA user_version` (currently **v6**)
2. ✅ Assets live in the DB (BLOB keyed by SHA-256 content hash), never file paths — deleting the original file never breaks a scene
3. ✅ File-model save/open — the active layout file is tracked (default is the AppData DB); **Save Layout As… / Open Layout…** switch the active file; auto-save writes to whatever is active
4. ✅ Auto-save (invisible) — ~1.5s debounce on scene/source add/remove/reorder/rename/hide + any source transform change; flush on window close
5. ✅ Startup — load the active file; seed the five canonical scenes only when the DB is empty; (+) re-adds a missing canonical scene and is hidden once all five are present; adding beyond the five is rejected
6. ✅ Schema v1 → v6 — webcam columns (v2), singleton `Webcam` + per-scene `WebcamSceneConfig` (v3), `RectWidth`/`RectHeight` round-to-rect restore (v4), `Source.IsBackdrop` + `Source.CaptureKey` (v5), `Scene.HasBackdrop` — backdrop **Live-only by policy** (v6, one-time backfill + `EnforceBackdropPolicy` on every load); `WindowHandle` stays in-memory (per-session); save = transactional rewrite; orphaned assets pruned
### Design decisions
1. **SQLite database** (`Microsoft.Data.Sqlite`) at `%APPDATA%\ytLlive\ytLlive.db`; schema versioned
@@ -383,13 +433,11 @@ cache refresh, empty payload, missing zip entry, downloader failure) — **78 pa
button re-adds a missing canonical scene and is hidden once all five are present;
adding beyond the five is rejected — work with less, never more.
### Status: ✅ Implemented
---
## Backlog (future versions)
- v0.2 — Recording to local file (recordings carry the branding flash — see TASK 3 / `ai.md` Monetization)
- v0.3 — Stream scheduling
- v0.4 — Multi-destination restreaming
- v0.5 — Stream clipping
1. v0.2 — Recording to local file (recordings carry the branding flash — see TASK 3 / `ai.md` Monetization)
2. v0.3 — Stream scheduling
3. v0.4 — Multi-destination restreaming
4. v0.5 — Stream clipping