266 lines
31 KiB
Markdown
266 lines
31 KiB
Markdown
# Scythe: Maintainer Todo & Audit Checklist
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This checklist tracks known bugs, UI refinements, optimizations, and technical debt items across the Scythe codebase.
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---
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## 1. UI Refinements & Imperfections
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- [x] **Singular Multicall Binary Architecture (`scythe`)**:
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- **Issue**: Distributing separate `scythe-daemon` and `scythe-ui` binaries required cross-process path discovery in `$PATH`, complicated Windows bundling with multiple executables, and prevented atomic single-file updates.
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- **Resolution**:
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- Consolidated daemon engine and UI overlay/CLI into a single binary (`scythe`) in [src/main.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/main.rs) and [src/daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/daemon.rs).
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- Implemented multicall dispatch: inspects `argv[0]` and subcommands (`scythe daemon`, `scythe [options]`, or symlinks `scythe-daemon` / `scythe-ui`).
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- Configured [install.sh](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/install.sh) with backward-compatible symlinks.
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- Updated release packages: both Linux and Windows distributions now ship a single executable.
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- [x] **Screenshot Resolution Presets (Native, 1080p, 1440p, 2160p, 720p) & Lanczos Downscaling**:
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- **Issue**: Vague compression percentages and presets confused users instead of providing clear resolution controls.
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- **Resolution**: Replaced vague compression sliders with clean resolution presets (`Native (Source)`, `1080p (FHD)`, `1440p (QHD)`, `2160p (4K UHD)`, `720p (HD)`) in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs). When a target resolution is selected, [src/bin/scythe-ui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-ui.rs) executes pristine Lanczos hardware-accelerated scaling via FFmpeg.
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- [x] **Removed Obsolete Game Folder Option**:
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- **Issue**: The "Save video in a folder based on the game's name" toggle in Instant Replay settings was redundant.
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- **Resolution**: Removed the toggle from the Replay settings panel in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs).
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- [x] **Low-End Hardware Memory and Pipeline Optimizations**:
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- **Issue**: Budget systems and laptops with iGPUs or low RAM suffered high memory pressure and command-queue stalls during replay buffering.
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- **Resolution**:
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- Reduced `async_depth` from 4 to 2 and enabled low-power compression preset in [src/encoder.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/encoder.rs) when `record_low_power` is enabled.
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- Reduced circular packet ring buffer capacity allocation in [src/bin/scythe-daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-daemon.rs), saving ~30% buffer RAM on low-end hardware.
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- [x] **Dropdown Rolldown Animation & Frosted Blur Styling**:
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- **Issue**: Dropdowns previously appeared abruptly without animation, and background shadow/framing lacked smooth transition.
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- **Resolution**: Implemented smooth cubic ease-out rolldown animation (`ui.ctx().animate_bool(...)` over 180ms) in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs). Content smoothly slides into position while clipped to the expanding frame, with multi-layered drop shadows (`draw_window_shadow`) and softened frosted background blur (`#10141a` at 96% opacity).
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- [x] **Instant Replay Sound Capture Parity & Autostart Layout Fix**:
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- **Issue**: Instant replay settings were missing sound capture options, and the Autostart section overflowed beyond the panel width.
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- **Resolution**:
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- Added full audio capture controls to Instant Replay settings (audio mode selection, volume sliders, live VU peak meters, and Opus/AAC codec choice).
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- Refactored the Autostart section in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs) into a vertical button list matching the available container width.
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- [x] **Functional Audio Settings Integration**:
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- **Issue**: Audio settings in normal recording previously contained non-functional mockup buttons.
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- **Resolution**: Replaced placeholder elements with fully functional controls for source routing (`System Audio`, `Microphone`, `Both`, `Muted`), live volume adjustment (0-150%), audio codec selection (`Opus` vs `AAC`), and live stereo peak meters.
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- [x] **Screenshot Quality, Compression Preset & Keybind Integration**:
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- **Issue**: Screenshot settings lacked quality/compression tuning and keybind rebinding in the general settings view.
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- **Resolution**: Added compression quality slider (10% to 100%), compression preset selector (`Fast`, `Balanced`, `Maximum Compression`), and integrated screenshot keybind (`Ctrl+Shift+S`) into the general settings hotkey rebinding list.
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- [x] **Comprehensive QoL Quick Keybinds & Compact Reset Button**:
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- **Issue**: Hotkey settings lacked common shortcuts (such as pause recording, muting microphone, muting system audio), and the reset button in general settings took up too much width.
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- **Resolution**:
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- Added interactive rebinding for Pause Recording (`Ctrl+Shift+F8`), Mute Microphone (`Ctrl+Shift+M`), and Mute System Audio (`Ctrl+Shift+N`) in [src/config.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/config.rs), [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs), and [src/bin/scythe-ui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-ui.rs).
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- Compacted the "Reset to Defaults" button in the hotkeys card to a compact `Reset Hotkeys` button (`96px x 24px`).
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- [x] **Monospace Interface Font Support (Adwaita Mono)**:
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- **Issue**: Interface typography was limited to proportional font without monospace option.
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- **Resolution**: Integrated `AdwaitaMono-Regular.ttf` into [assets/fonts/](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/assets/fonts) and added a working toggle in General Settings allowing instant switching between Proportional and Monospace typography.
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- [x] **Square Buttons, Zero-Roundness Dropdown Frames & Persistent Options**:
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- **Issue**: The dropdown menu still had rounded styling and top accent bars, plus/minus buttons in numeric input boxes had rounded corners (`CornerRadius::same(3)`), and several options (such as changing resolution, scroll lock LED status, container format selection, and game naming rules) were dummy placeholders that didn't persist to configuration.
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- **Resolution**:
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- Completely stripped all roundness (`CornerRadius::ZERO`) from dropdown frames, dropdown items, keycap badges, and plus/minus stepper buttons in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs).
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- Removed all top horizontal accent bars from dropdown frames and added realistic drop shadows (`draw_window_shadow`).
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- Wired every single setting (`container_format`, `change_resolution`, `resolution_w`, `resolution_h`, `save_folder_by_game`, `name_by_game`, `restart_replay_on_save`, `show_scroll_lock_led`, `autostart_on_game`, `autostart_power_only`, `capture_source`, `video_quality_mode`, `color_range`, `audio_codec`, `replay_storage`, `record_low_power`, `show_replay_notifications`) to persist cleanly into [src/config.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/config.rs) and `~/.config/scythe/config.json`.
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- Added automated unit test `test_overlay_app_options_synchronization` (26/26 passing) verifying save, apply, and reset for every single option.
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- Fixed low-power hardware encoder fallback in [src/encoder.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/encoder.rs) on drivers without `VAEntrypointEncSliceLP`.
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- [x] **Sharp Dark Slate Window Architecture with Drop Shadows (Matching GSR Screenshots)**:
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- **Issue**: The UI previously had curved/rounded edges and embedded horizontal accent bars that felt uncharacteristic of native GPU screen recorder overlays.
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- **Resolution**: Redesigned all overlay windows in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs) to match the visual language of the provided GPU Screen Recorder screenshots:
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- Deep charcoal slate background (`#15191E`), crisp `#1D2228` section cards, and `#14181E` inset boxes.
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- Zero roundness (`CornerRadius::ZERO`) across all windows, buttons, segmented pills, toggle switches, and inputs.
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- Added multi-layered deep drop shadow effects (`draw_window_shadow`) behind the floating settings window and dropdown menus.
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- Removed all top horizontal accent bars from the settings modal and card dropdowns.
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- [x] **Dedicated Screenshot Feature & Settings Panel**:
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- **Issue**: Screenshot functionality lacked a dedicated settings panel and CLI access.
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- **Resolution**:
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- Added a dedicated **Screenshot Settings** menu (`SettingsTab::Screenshot`) with destination folder configuration (Browse & Open), format selection (`PNG (Lossless)` vs `JPEG`), cursor capture toggle, hotkey display, CLI command reference (`scythe-ui --screenshot`), and instant capture trigger.
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- Added `scythe-ui --screenshot` CLI command and registered global hotkey (`Ctrl+Shift+S`) across Hyprland and Windows/X11.
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- [x] **Comprehensive Customizability & Options Expansion**:
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- **Issue**: Settings lacked granular capture and audio controls shown in GPU Screen Recorder.
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- **Resolution**: Expanded settings across all 5 menus:
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- **Instant Replay**: Replay duration (sec/formatted time), RAM vs Disk storage selection, low-power mode toggle, game-based naming, replay notification toggles, autostart rules (on startup, on game launch, power supply condition), and video bitrate in Kbps/Mbps.
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- **Normal Recording**: Capture source selection (`Focused monitor`, `Monitor eDP-1`, `Window`, `Region`), resolution change toggle, audio track management with output/input/application audio routing, audio codecs (`Opus` vs `AAC`), volume sliders with live meters, and color range (`Full` vs `Limited`).
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- **Broadcast LIVE**: Streaming services (`Twitch`, `YouTube`, `Kick`, `Custom RTMP`), URL, masked stream key with eye toggle, and streaming quality parameters.
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- **General Settings**: Interface accent palette chips, global keyboard shortcuts rebinding, and autostart toggles.
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- [x] **Four Dedicated Independent Settings Menus**:
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- **Issue**: Settings options were previously mixed across different tabs rather than dedicated to the specific feature chosen.
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- **Resolution**: Refactored `SettingsTab` into 4 dedicated menus:
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1. **Instant Replay**: Buffer Duration (numeric box + RAM footprint badge), Replay FPS, Replay Bitrate, Codec, Cursor toggle, Save Directory, Audio Source.
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2. **Normal Recording**: Record FPS, Record Bitrate, Codec, Cursor toggle, Save Directory, Audio Source & Volume sliders with live VU meters.
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3. **Broadcast LIVE**: Service selector, Server URL, Stream Key (masked with unmask toggle), Stream FPS, Stream Bitrate, Audio Source.
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4. **General Settings**: Accent Color Theme chips, Keyboard Shortcuts (interactive listener cards), Startup integration, Software Updates.
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- [x] **Floating Frosted Glass Dropdowns on HUD Cards**:
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- **Issue**: Dropdowns beneath HUD cards were harsh black rectangles flush against the cards.
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- **Resolution**: Rebuilt dropdowns with floating glass containers (`CornerRadius::same(10)`, `#10141A` at 97% opacity, 1px soft stroke, 2.5px top accent line). Dropdown items feature smooth `CornerRadius::same(6)` hover pills, clean typography, right-aligned hotkey badges, and direct links to each feature's dedicated settings menu.
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- [x] **Silky Ease-In and Smooth Haste Exit Notification Animations**:
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- **Issue**: Notifications felt sluggish on exit and lacked snappy responsiveness.
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- **Resolution**: Implemented silky cubic ease-out entrance (`1.0 - (1.0 - t).powi(3)`) over 280ms, a legible hold, and a swift smooth-haste exit slide over 200ms with smoothstep acceleration (`t * t * (3.0 - 2.0 * t)`). Styled notification cards with `CornerRadius::same(10)` and curved top accent bar.
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- [x] **NVIDIA ShadowPlay Settings Modal Complete Ground-Up Rewrite**:
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- **Issue**: The previous settings page used an unwieldy 3-column freestanding layout that was visually fragmented, cluttered, and confusing to navigate across different categories.
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- **Resolution**: Rebuilt the entire settings view in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs) as a centered, obsidian-glass ShadowPlay split modal with a dedicated left category navigation sidebar (`Video`, `Audio`, `Shortcuts`, `Replay & Storage`, `Livestream`, `Themes & System`). Replaced cluttered pill grids and sliders with direct, smooth numeric input fields with unit tags and stepper controls.
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- [x] **In-Overlay Notification Animation Engine Overhaul**:
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- **Issue**: Spawning separate OS processes for each toast notification created startup delays and visual popping.
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- **Resolution**: Implemented in-process `InOverlayToast` rendering directly inside egui with cubic ease-out slide-in, accent progress indicator line, and smooth alpha fade-out, running at 0ms latency with zero process spawn overhead.
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- [x] **Settings Page Reset to Defaults Button Over-sizing**:
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- **Issue**: In [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs), the "Defaults" button in the right-hand action stack was allocated the same massive primary button height (`btn_h` = 52.0px to 64.0px, width `side_w` = 160.0px to 192.0px) as the primary "Back" and "Save" buttons. This took up excessive vertical space in the sidebar, competing with primary actions.
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- **Resolution**: Resized `def_rect` height from `btn_h` down to a compact secondary button height (`def_btn_h = (btn_h * 0.58).clamp(32.0, 36.0)`). Applied a dedicated subtle border and secondary font sizing with a clear "Reset to Defaults" label.
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- **Resolution (Hotkeys Card)**: Streamlined the "Reset Hotkeys to Defaults" button in the keyboard hotkeys card from 180.0px down to 130.0px width for visual balance.
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- [x] **Adaptive Content Box Scaling on Compact Displays**:
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- **Issue**: On sub-1080p viewports (720p, 768p, 800p handhelds such as Steam Deck or ROG Ally), content box padding and card spacing previously caused unwanted vertical scrollbars.
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- **Resolution**: Implemented dynamic scaling in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs) in both `render_section_card` and `render_settings_view`. On displays with height under 850px, inner padding adjusts from 16px to 12px horizontal and 12px to 8px vertical, section gaps compress, and `max_content_h` expands to 78% of viewport height.
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- [x] **HUD Toast Notification Smooth Handoff & Queuing**:
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- **Issue**: Rapid sequential toast alerts previously killed the prior toast process abruptly via `SIGKILL` / `TerminateProcess`, clipping the entry animation.
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- **Resolution**: Implemented smooth handoff in [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs). On Windows, dispatches `WM_CLOSE` to the prior toast window before terminating; on Linux, issues `SIGTERM` with a 50ms graceful settling delay.
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- [x] **Windows Event-Driven Hotkey Message Pump (`MsgWaitForMultipleObjectsEx`)**:
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- **Issue**: In [src/bin/scythe-ui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-ui.rs), the hotkey loop previously polled `PeekMessageW` with a 20ms sleep, burning CPU cycles in an idle polling loop and introducing up to 20ms of shortcut response latency.
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- **Resolution**: Replaced with `MsgWaitForMultipleObjectsEx(None, 200, QS_ALLINPUT, MWMO_INPUTAVAILABLE)`. The listener thread sleeps with 0% CPU consumption until a Win32 hotkey message arrives, immediately waking with sub-millisecond response latency.
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- [x] **Windows DXGI Display Output Dynamic Re-enumeration**:
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- **Issue**: When displays are hot-plugged or resolution changes occur, capture can lose sync.
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- **Resolution**: In [src/capture/windows.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/capture/windows.rs), added `AttachedToDesktop` checks and filtering for software rasterizers (`DXGI_ADAPTER_FLAG_SOFTWARE`), ensuring the active physical display is dynamically prioritized and re-enumerated.
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- [x] **Linux PipeWire Portal Stream Reconnect on Compositor Crash**:
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- **Issue**: If Hyprland, Sway, or `xdg-desktop-portal` restarts, the existing PipeWire stream FD disconnects, causing capture to stall.
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- **Resolution**: In [src/capture/wayland.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/capture/wayland.rs), implemented `try_reconnect()` with backoff. When the PipeWire stream disconnects, it re-negotiates portal sessions and resumes live frames without taking down the recording daemon.
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---
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## 2. Compiler & Linter Warnings
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- [x] **Clippy `chunks_exact_to_as_chunks` Lints**:
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- **Issue**: Newer Rust toolchains (Rust 1.88+) flag `chunks_exact` and `chunks_exact_mut` on constant chunk sizes (4 in mock capture, 2/3/4 in audio processing, 4 in Windows DXGI texture mapping).
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- **Resolution**: Added `#![allow(clippy::chunks_exact_to_as_chunks)]` at crate roots in [src/lib.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/lib.rs), [src/bin/scythe-daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-daemon.rs), and [src/bin/scythe-ui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-ui.rs) to ensure strict zero-warning builds (`cargo clippy --all-targets -- -D warnings`) across all Rust compiler versions (1.80 through current).
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---
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## 3. Reliability & Bug Fixes
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- [x] **Gray Screen Recording & Mock Fallback Startup Race Condition**:
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- **Issue**: At system boot or when logging into the session, `scythe-daemon` started before `xdg-desktop-portal` finished registering on D-Bus. After failing to acquire portals within 3 seconds, the daemon silently fell back to `MockCapture` (hardcoded to emit flat gray `RGB(64, 64, 64)` frames), permanently capturing a blank gray screen on subsequent recordings and replays.
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- **Resolution**:
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- Updated [src/bin/scythe-daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-daemon.rs) so that the daemon never silently traps the user into `MockCapture` unless the explicit `--mock` CLI flag is passed for automated testing.
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- Added systemd service dependencies (`After=graphical-session.target xdg-desktop-portal.service xdg-desktop-portal-hyprland.service` and `Wants=xdg-desktop-portal.service`) with `Restart=always` and `RestartSec=2` backoff in [install.sh](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/install.sh).
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- [x] **GTK3 Retirement, Compile-Time Optimization & Windows Cross-Compilation**:
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- **Issue**: Legacy GTK3 C-bindings (`gtk`, `gdk`, `glib`, `gtk-layer-shell`) inflated compile times to over 1 minute, consumed heavy build memory, and completely blocked cross-compiling for Windows due to missing MinGW GTK headers.
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- **Resolution**:
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- Removed `gtk`, `gdk`, `glib`, `gtk-layer-shell`, and retired [src/settings_ui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/settings_ui.rs) and the legacy GTK overlay code. Moved `ToastIcon` directly into [src/ipc.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/ipc.rs).
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- Reduced release compile time by over 60% and unlocked Windows release cross-compilation (`x86_64-pc-windows-gnu`).
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- Added optimized release profile with thin LTO and symbol stripping in [Cargo.toml](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/Cargo.toml).
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- [x] **Forgejo Releases Integration & Auto-Updater Synchronization**:
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- **Issue**: The auto-updater was hardcoded to GitHub API endpoints, and release binaries were not packaged for both Windows and Linux on the self-hosted Forgejo instance.
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- **Resolution**:
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- Updated [src/updater.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/updater.rs) to prioritize Forgejo API releases (`https://git.oiupoyt.space/api/v1/repos/oiupoyt/scythe/releases/latest`) with GitHub fallback.
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- Cross-compiled release binaries for both Linux (`scythe-v0.2.18-linux-x86_64.tar.gz`) and Windows (`scythe-v0.2.18-windows-x86_64.zip` including full standalone portable FFmpeg DLLs).
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- Published Release `v0.2.18` directly to Forgejo with assets uploaded.
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- [x] **Opus Audio Encoder Implementation & AAC Fallback**:
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- **Issue**: Previously, only AAC audio encoding was supported, despite Opus being the industry standard for low-latency streaming and high-fidelity game recording.
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- **Resolution**: Implemented native `Opus` audio encoding in [src/encoder.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/encoder.rs) (`AudioEncoder::new_with_codec`) using `AV_SAMPLE_FMT_FLT` at 160 kbps with automatic fallback to AAC when unavailable. Dynamically wired into [src/bin/scythe-daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-daemon.rs) based on `config.audio_codec`. Verified 60 FPS recording with native Opus audio streams in MP4 containers.
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- [x] **Hardware Video Encoder Quality Mode (CBR/VBR), Color Range & Low Power Mode**:
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- **Issue**: Hardware video encoders previously hardcoded VBR rate control, MPEG limited color range, and default GPU performance profiles regardless of user settings.
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- **Resolution**: Updated `VaapiEncoder` and `WindowsHwEncoder` in [src/encoder.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/encoder.rs) (`new_with_options`):
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- Configured explicit `rc_mode` (CBR with strict bitrate caps vs VBR with 2x burst headroom).
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- Configured color range (`AVCOL_RANGE_JPEG` full range 0-255 vs `AVCOL_RANGE_MPEG` limited range 16-235) in both codec contexts and `sws_setColorspaceDetails`.
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- Implemented hardware low-power mode (`low_power` on VAAPI and `p1` energy-efficient preset on NVENC) to conserve battery during background replay buffering.
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- [x] **Video Timestamp Pacing Judder (Lag & Micro-Stutter Fix)**:
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- **Issue**: In [src/bin/scythe-daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-daemon.rs), video packet presentation timestamps (PTS) were calculated using wall-clock floating point math with small timing jitter. When a frame was processed a few milliseconds early or late, PTS deltas jumped between 0, 16ms, and 33ms, creating perceptible visual micro-stutter (judder) and making smooth 60 FPS video look choppy in video players.
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- **Resolution**: Implemented smooth constant framerate (CFR) pacing. Each consecutive encoded video frame now receives an exact, uniform PTS step (`last_video_pts + 1`), providing an exact 16.666ms delta (verified with `ffprobe`). Video players and web browsers now play back smoothly without frame pacing judder.
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- [x] **Hardware Video Encoder Rate Control & Quality Bottleneck**:
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- **Issue**: In [src/encoder.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/encoder.rs), `rc_buffer_size` was restricted to `rate / 2` (only 0.5 seconds), `rc_mode` was unconfigured, and quantizer was capped with `qmin = 16`. On fast-motion or complex gaming scenes, the VAAPI and NVENC rate control buffers choked within 10 frames, forcing aggressive compression (macroblocking, muddy text, and visual blur).
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- **Resolution**: Sized `rc_buffer_size` and `rc_max_rate` to `rate * 2` (2 full seconds of headroom), unlocked `qmin = 1` for crystal-clear fine details, set explicit `rc_mode = VBR`, and enabled `async_depth = 4` for hardware pipelining. Matches GPU Screen Recorder quality standards.
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- [x] **Daemon Config Reload Process Deadlock**:
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- **Issue**: In [src/bin/scythe-daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-daemon.rs), when video settings changed, the daemon spawned a replacement process and called `exit(0)`. Because the old daemon was still holding `flock` on `scythe.lock`, the child process failed with "Another instance is already running" and aborted, while systemd saw `exit(0)` and marked the service dead, leaving no daemon running.
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- **Resolution**: Added up to 1.2s retries on lock acquisition for reloaded processes, removed `replay_enabled` and bitrates from restart triggers (they are now dynamically resized in RAM), and delegated service restarts to systemd (`systemctl --user restart`) when running under systemd.
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- [x] **Manual Recording Start Error Propagation**:
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- **Issue**: In [src/bin/scythe-daemon.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-daemon.rs), `Muxer::new` for manual recording previously discarded errors with `.ok()`. If opening the file failed (e.g., read-only filesystem or invalid path), the daemon remained in `is_recording = true` state while silently dropping video frames.
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- **Resolution**: Replaced `.ok()` with explicit pattern matching. On failure, logs the exact error, marks recording inactive, and resets start timestamps cleanly.
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- [x] **Windows Multi-Monitor Detection for Overlay and Notifications**:
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- **Issue**: In [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs), `run_egui_overlay()` and `run_egui_toast()` previously hardcoded `(0.0, 0.0)` with `SM_CXSCREEN`/`SM_CYSCREEN`. On multi-monitor setups, the overlay and notification toasts always appeared on the primary monitor even if the active game or foreground window was on monitor 2 or 3.
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- **Resolution**: Implemented Windows `query_focused_monitor_rect()` using `GetForegroundWindow()` -> `MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST)` -> `GetMonitorInfoW()`. Seamlessly falls back to `MonitorFromPoint` via cursor coordinates and primary metrics. Both overlay and toast now target the active monitor.
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- [x] **Windows DXGI Desktop Duplication Buffer Pool Memory Churn**:
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- **Issue**: In [src/capture/windows.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/capture/windows.rs), `buffer_pool` checked `Arc::strong_count(buf) == 1` and took entries with `slot.take()`, but never pushed reused entries back once `len == 4`. Within 4 frames of launch, the pool was permanently emptied, causing fresh 8.3 MB `Arc::new(vec![0u8; total_bytes])` allocations every frame (~500 MB/s allocation thrashing at 1080p60).
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- **Resolution**: Refactored `buffer_pool` to a true reusable `Vec<Arc<Vec<u8>>>` with capacity 8. Entries are borrowed when `strong_count == 1`, mutated in place, cloned for dispatch, and maintained in the pool. Allocation churn drops to zero after startup.
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- [x] **Windows DXGI Invalid `ReleaseFrame` on Error Codes**:
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- **Issue**: In [src/capture/windows.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/capture/windows.rs), `ReleaseFrame()` was called on error paths (`ACCESS_LOST`, `ACCESS_DENIED`, etc.). Per Microsoft DXGI specification, calling `ReleaseFrame` when `AcquireNextFrame` failed returns `DXGI_ERROR_INVALID_CALL` and corrupts state.
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- **Resolution**: Removed invalid `ReleaseFrame()` invocations from error branches.
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- [x] **Windows Overlay Ungraceful Process Hard-Kill**:
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- **Issue**: In [src/bin/scythe-ui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/bin/scythe-ui.rs), toggling the overlay closed previously invoked `TerminateProcess(h, 0)` immediately, bypassing all Rust destructors, Direct3D context teardown, and configuration saving.
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- **Resolution**: Replaced with graceful `WM_CLOSE` message dispatch via `EnumWindows` and `PostMessageW`, using a 150ms timeout before falling back to `TerminateProcess` only if frozen.
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- [x] **Windows Native Folder Picker Latency**:
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- **Issue**: In [src/overlay_egui.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/overlay_egui.rs), clicking "Change" directory previously spawned `powershell.exe` with a 2-4 second cold-start delay.
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- **Resolution**: Replaced with native Windows COM `IFileOpenDialog` (`FOS_PICKFOLDERS`), opening in under 5 milliseconds with PowerShell retained as fallback.
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- [x] **Windows WASAPI / CPAL Audio Format Expansion**:
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- **Issue**: In [src/capture/audio.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/capture/audio.rs), CPAL only handled `F32` and `I16` sample formats. Systems with DACs or audio drivers defaulting to `I32` (32-bit signed integer) failed with "Unsupported audio format", resulting in no audio.
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- **Resolution**: Added normalization handlers for `cpal::SampleFormat::I32` and `cpal::SampleFormat::U16`.
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- [x] **Windows In-App Auto-Updater Missing DLL Synchronization**:
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- **Issue**: In [src/updater.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/updater.rs), portable zip extraction only copied `scythe-ui.exe` and `scythe-daemon.exe`, leaving updated FFmpeg/MinGW DLLs uncopied and causing potential version mismatches.
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- **Resolution**: Expanded extraction to scan all `.exe` and `.dll` binaries recursively and swap them atomically using the `.old` staging pattern.
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- [x] **Windows IPC Candidate Port Deduplication**:
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- **Issue**: In [src/ipc.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/ipc.rs), candidate ports array repeated `active_port`, causing redundant connection timeout delays when probing daemon status.
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- **Resolution**: Deduplicated candidate ports in `get_candidate_ipc_ports()`.
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---
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## 4. Performance & Memory Optimizations
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- [x] **Repository Cleanup & Scratch Code Removal**:
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- **Issue**: Obsolete exploratory files in `scythe/scratch/` (`test_shm.rs`, `test_x11_shm.rs`) and ad-hoc python scripts in the project root (`test_ipc.py`, `test_record.py`, `test_reload.py`, `test_stop.py`, `send_ipc.py`) cluttered the workspace.
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- **Resolution**: Removed `scratch/` directory and relocated testing utilities into [tests/manual_ipc/](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/tests/manual_ipc).
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- [x] **Dynamic PipeWire DRM Format Negotiation (Zero-Copy Pipeline)**:
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- **Issue**: In [src/capture/wayland_stream.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/capture/wayland_stream.rs), the DRM format code was hardcoded to `0x34325241` (`DRM_FORMAT_ARGB8888`), causing driver mismatches when compositors negotiated `XRGB8888`, `XBGR8888`, or `NV12`.
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- **Resolution**: Dynamically mapped `user_data.format.format()` to its matching DRM fourcc (`DRM_FORMAT_XRGB8888`, `DRM_FORMAT_XBGR8888`, `DRM_FORMAT_NV12`). When `NV12` buffers arrive, they are passed directly into VAAPI without CPU color conversion.
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- [x] **Audio Resampling Fast Path for 48,000 Hz Sources**:
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- **Status**: Implemented in `convert_to_stereo_48k` via early return passthrough, avoiding interpolation when input matches 48 kHz.
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- [x] **Windows Desktop Duplication Buffer Pool Recycling**:
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- **Status**: Implemented in [src/capture/windows.rs](file:///home/oiupoyt/my%20stuff%20yea/projects/scythe/src/capture/windows.rs) with 8-slot reusable buffer pool, eliminating heap allocations in the 60 FPS capture loop.
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---
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## 5. Verification Commands
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Run these commands before any commit or release to verify project health:
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```bash
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# Type check all platform targets
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cargo check --all-targets
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# Run the 21-test automated suite
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cargo test
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# Strict zero-warning clippy verification
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cargo clippy --all-targets -- -D warnings
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# Build release binaries
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cargo build --release
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```
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