CN：将本地视频自动抽帧并设置为桌面壁纸，支持立即切换、定时轮换、色调过滤、多屏模式与托盘启动。
EN: Automatically extracts frames from local videos and applies them as desktop wallpapers, with instant apply, scheduled rotation, tone filtering, multi-monitor modes, and tray startup.
JP: ローカル動画からフレームを自動抽出して壁紙に設定するツール。即時適用、定期切替、トーンフィルタ、マルチモニター、トレイ起動に対応。

• CN：HTWallpaper 是一个基于 FastAPI + 原生前端 的轻量桌面壁纸管理工具。它会从视频随机或按规则截帧，并调用系统接口设置壁纸。
• EN: HTWallpaper is a lightweight wallpaper manager built with FastAPI + vanilla frontend. It captures frames from videos (randomly or by rule) and applies them using OS wallpaper APIs.
• JP: HTWallpaper は FastAPI + 素のフロントエンド で構成された軽量壁紙マネージャーです。動画からルールベース/ランダムでフレーム抽出し、OS API で壁紙を設定します。

• 视频上传与管理 / Upload & manage videos / 動画の登録・管理
• 随机抽帧并立即应用 / Random frame + instant apply / ランダム抽出して即時適用
• 定时自动切换 / Scheduled wallpaper rotation / 定期自動切替
• 色调识别与筛选（红橙黄绿青蓝紫粉、灰、暗）/ Tone analysis and filtering / トーン解析とフィルタ
• 多屏模式（独立随机、跨屏拼接、克隆）/ Multi-monitor modes / マルチモニターモード
• 开机启动配置（Windows/macOS）/ Startup registration / 起動時自動開始設定
• 托盘运行（启动本地服务 + 打开 UI + 快速换图）/ Tray workflow / トレイ運用

• Backend: FastAPI, Uvicorn, APScheduler
• Frontend: HTML + CSS + Vanilla JavaScript
• Media processing: FFmpeg
• System integration:
  • Windows: ctypes, pywin32, winreg, 任务计划
  • macOS: osascript, LaunchAgents
• Python dependencies: see requirements.txt

HTWallpaper/
├─ app/
│  ├─ main.py               # FastAPI 入口与 API
│  ├─ tray.py               # 托盘启动器
│  ├─ services/
│  │  ├─ wallpaper.py       # 抽帧、色调分析、设壁纸（含多屏）
│  │  ├─ scheduler.py       # 定时调度与开机启动配置
│  │  ├─ settings.py        # settings.json 读写
│  │  ├─ video_store.py     # videos.json 读写
│  │  ├─ tones.py           # tones.json 读写
│  │  ├─ library.py         # 上传与视频目录管理
│  │  └─ compat.py          # 兼容性检测（冲突进程）
│  └─ static/
│     ├─ index.html         # Web UI
│     ├─ app.js             # 前端交互逻辑
│     └─ styles.css         # 样式
├─ data/
│  ├─ videos.json           # 视频索引
│  ├─ tones.json            # 帧色调索引
│  ├─ settings.json         # 用户设置
│  └─ frames/               # 抽帧输出目录
├─ run.bat / run.command / run.vbs
├─ fix.bat / fix.command
└─ requirements.txt

• Python 3.10+ (recommended)
• FFmpeg available in PATH
• OS: Windows / macOS (Linux can run server/UI but wallpaper setting is not implemented)

• Virtual environment (.venv)
• On Windows: pywin32 for per-monitor APIs

python3 -m venv .venv
source .venv/bin/activate        # macOS/Linux
# .venv\Scripts\activate         # Windows PowerShell/CMD
pip install -r requirements.txt

.venv/bin/python -m uvicorn app.main:app --host 127.0.0.1 --port 8787
# Windows: .venv\Scripts\python -m uvicorn app.main:app --host 127.0.0.1 --port 8787

Open: http://127.0.0.1:8787

• Windows: run.bat (admin-elevated launcher), or run.vbs (silent)
• macOS/Linux: ./run.command

If virtualenv Python path is broken, use:

• Windows: fix.bat
• macOS/Linux: ./fix.command

• Upload multiple video files via UI.
• Files are stored in configured video_dir; metadata synced to data/videos.json.
• Video list supports deletion.

• Picks a random frame from available videos.
• Optional tone filtering.
• Applies wallpaper immediately.

• Enable periodic changes by interval (minutes).
• Supports tone-constrained randomization.
• Settings persist and are restored on next startup.

• per_monitor_pywin32: independent random image per monitor (preferred on Windows).
• per_monitor_ctypes: fallback implementation.
• span_mosaic: builds a combined mosaic image and sets span wallpaper.
• clone: same image on all monitors.

• Windows: creates/deletes scheduled task HTWallpaper.
• macOS: creates/removes ~/Library/LaunchAgents/com.htwallpaper.app.plist.

• When enabled in Settings, UI panels display JSON API responses for troubleshooting.

• frame_limit: max number of stored frames
• wallpaper_style: fill | fit | stretch | center | tile
• video_dir: source video directory
• max_attempts: max retries when sampling tone-matched frames
• schedule_enabled: whether schedule is active
• schedule_interval_minutes: scheduler interval
• schedule_tones: tone filter list
• multi_screen_enabled: enable multi-monitor logic
• multi_screen_mode: multi-monitor mode
• span_layout: auto | lr | rl | tb
• debug_mode: show API JSON in UI

• data/videos.json: list of tracked videos
• data/tones.json: frame-tone index for filtering
• data/frames/: extracted JPG frames (_live, _mosaic, per-video folders)
• data/*.log: runtime logs (server.log, tray.log, etc.)

Base URL: http://127.0.0.1:8787

• GET / - UI page
• POST /api/upload - upload videos (files[])
• GET /api/videos - list videos
• DELETE /api/videos?path=... - delete one video
• POST /api/extract - rule-based extraction
• POST /api/apply - extract/apply immediately
• POST /api/schedule - start/stop scheduler
• POST /api/startup - configure startup behavior
• GET /api/settings - read settings
• POST /api/settings - update settings
• GET /api/status - compatibility + scheduler status

• Windows
  • Full feature support (including advanced multi-monitor modes).
  • Compatibility check reports known conflicting wallpaper processes.
• macOS
  • Wallpaper apply and startup supported via AppleScript + LaunchAgents.
  • Multi-desktop handled through System Events scripts.
• Linux
  • Server and UI can run, but wallpaper setting currently returns unsupported.

1. FFmpeg not found / ffmpeg 不可用 / ffmpeg が見つからない
   Ensure ffmpeg -version works in terminal.

2. No wallpaper changes / 壁纸未切换 / 壁紙が変わらない

   • Check data/server.log and data/tray.log.
   • Verify video list is not empty and frame extraction succeeds.

3. Startup not working / 开机启动失败 / 自動起動失敗

   • Windows: verify Task Scheduler has HTWallpaper.
   • macOS: inspect LaunchAgent plist and launchctl list.

4. Virtualenv path mismatch / 虚拟环境路径错误 / venv パス不整合
   Run fix.bat or fix.command.

# Run backend with reload
uvicorn app.main:app --host 127.0.0.1 --port 8787 --reload

# Basic syntax check
python -m compileall app

No explicit license file is currently included. If you plan to publish publicly, add a license (e.g., MIT) before wide distribution.