v4.0.0 — Tauri desktop app + AI assistant

Language / 語言 / 语言: English · 繁體中文 · 简体中文

Windows installers

Download one of the two below — both install the same app:

• Multimedia Downloader_4.0.0_x64-setup.exe — NSIS installer (smaller download)
• Multimedia Downloader_4.0.0_x64_en-US.msi — MSI installer

Both bundle the Python engine and ffmpeg — no separate Python or ffmpeg install needed. See the Version4.0 README for full install/usage instructions.

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English

Added

• AI Assistant — describe a batch task in plain language; a multi-model OpenRouter pipeline drafts a plan that only runs after your explicit confirmation.
• Native desktop app rebuilt on Tauri (Rust shell + Svelte/TypeScript/Tailwind UI), replacing the tkinter GUI.
• Modular multi-language architecture — Python engine, Rust shell, TypeScript frontend, connected via a documented stdio JSON-RPC protocol.
• JSON-based i18n (locales/*.json, 165 keys) — English / 繁體中文 / 简体中文.
• Batch task queue with live per-item progress.

Known limitations

• AI Assistant errors at runtime in this release. Low-usage feature, so this does not block the release; fix is scheduled for v4.1 (shipping together with a real deployable web version). All other features (download, convert, batch queue, stop/cancel) have been verified working on this exact packaged build.
• Linux / macOS installers not yet built (Windows only for now).

License

This project's own code is MIT-licensed. The bundled ffmpeg is GPLv3 — see THIRD-PARTY-NOTICES.md.

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繁體中文

新增

• AI 助手 — 用自然語言描述批次任務；OpenRouter 多模型協作管線產生計畫，經你明確確認後才執行。
• 原生桌面 app 以 Tauri 重建（Rust 殼 + Svelte/TypeScript/Tailwind 前端），取代原本的 tkinter GUI。
• 模組化多語言架構 — Python 引擎、Rust 殼、TypeScript 前端，以文件化的 stdio JSON-RPC 協定連接。
• JSON 化 i18n（locales/*.json，165 keys）— 英文／繁體中文／簡體中文。
• 批次任務佇列，即時逐項進度。

已知限制

• 本版本 AI 助手運行時會出錯。因使用頻率低，不阻擋本次發布；修復排入 v4.1（與真正可部署的網頁版一併推出）。其餘功能（下載、轉換、批次佇列、停止/取消）皆已在這個打包版本上驗證正常。
• Linux / macOS 安裝檔尚未建置（目前僅 Windows）。

授權

本專案自身程式碼採 MIT 授權。內建的 ffmpeg 為 GPLv3——見 THIRD-PARTY-NOTICES.md。

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简体中文

新增

• AI 助手 — 用自然语言描述批次任务；OpenRouter 多模型协作管线生成计划，经你明确确认后才执行。
• 原生桌面 app 以 Tauri 重建（Rust 壳 + Svelte/TypeScript/Tailwind 前端），取代原本的 tkinter GUI。
• 模块化多语言架构 — Python 引擎、Rust 壳、TypeScript 前端，以文档化的 stdio JSON-RPC 协议连接。
• JSON 化 i18n（locales/*.json，165 keys）— 英文／繁体中文／简体中文。
• 批次任务队列，实时逐项进度。

已知限制

• 本版本 AI 助手运行时会出错。因使用频率低，不阻挡本次发布；修复排入 v4.1（与真正可部署的网页版一并推出）。其余功能（下载、转换、批次队列、停止/取消）均已在这个打包版本上验证正常。
• Linux / macOS 安装包尚未构建（目前仅 Windows）。

许可证

本项目自身代码采用 MIT 许可证。内置的 ffmpeg 为 GPLv3——见 THIRD-PARTY-NOTICES.md。

v3.0.0

Added

• Web app (web_app.py) — Flask-based browser interface. Run locally or
  deploy to any WSGI host. Includes JSON API, per-job progress polling, and a
  shared dark theme matching the desktop GUI.
• Tri-language UI — English (default), Traditional Chinese, Simplified
  Chinese. Switch at runtime; both interfaces share i18n.py.
• Shared engine (core.py) — extracted yt-dlp + ffmpeg logic into a
  UI-agnostic Downloader / Converter pair so the desktop GUI and web app
  reuse the exact same code path.

Changed

• English-first interface — all UI text, log lines, and dialog messages
  now default to English; the previous bilingual labels are replaced by a
  language switcher.
• Cleaner architecture — desktop GUI shrunk by factoring the engine out,
  leaving the file focused on layout + tkinter glue.
• Format string handling — log messages use keyed templates resolved
  through Translator.t(key, **fmt) so adding languages no longer requires
  editing core logic.

Improved

• Cooperative stop now reliably interrupts both downloads and conversions via
  Downloader.stop() / Converter.stop() on the shared engine.
• Progress callbacks now report percent, speed, and ETA as a typed tuple
  instead of stringly-typed config calls.
• format_filesize() extended to GB and keeps the 1 MiB boundary fix.
• Conversion status cells in the desktop tree now re-translate when the
  language is switched mid-session.