🎵 FLAC Converter Pro (PyQt6 + FFmpeg)

A modern cross-platform GUI application to convert FLAC audio files into OPUS, AAC, or MP3 with best quality, metadata preservation, and a clean desktop UI.

Built using Python + PyQt6 + FFmpeg.

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✨ Features

• 🎧 Convert FLAC → OPUS / AAC / MP3
• 🔊 Best quality presets
  • OPUS (160 kbps VBR)
  • AAC (256 kbps)
  • MP3 (V0 – highest quality)
• 🖼️ Album art handling
  • Embed artwork for AAC / MP3
  • Auto-extract cover.jpg for OPUS
• ⚠️ Smart warning: OPUS does not support embedded album art
• 📑 Preserve metadata & lyrics
• 📂 Drag & drop files or folders
• 📊 Progress bar + ETA (time remaining)
• ⏸ Pause / Resume FFmpeg process
• 🖥️ Live FFmpeg log window
• 👁️ Show / Hide FFmpeg log toggle
• 🌙 Dark mode toggle
• 🧠 Auto-download FFmpeg (Windows / Linux / macOS)
• 🎨 Clean, modern UI buttons

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🚀 Supported Formats

Output Format	Quality	Album Art
OPUS	Best (VBR)	❌ Not supported (cover.jpg extracted)
AAC (M4A)	256 kbps	✅ Embedded
MP3	V0 (Highest)	✅ Embedded

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🛠️ Requirements

• Python 3.9+
• Internet connection (only for first-time FFmpeg auto-download)

Python dependencies

pip install PyQt6

FFmpeg is automatically downloaded if not found on your system.

▶️ How to Run

python app.py

• Select output format (OPUS / AAC / MP3)

• Drag & drop FLAC files or folders

• Choose output directory

• Click Start Conversion

🧠 Technical Notes

• OPUS strictly disables video streams (-vn) to avoid container errors

• AAC & MP3 support embedded MJPEG album art

• Uses QProcess for non-blocking FFmpeg execution

• Safe stream mapping (-map 0:a, -map 0:v?)

• Cross-platform FFmpeg binaries:

• Windows: gyan.dev

• Linux: johnvansickle.com

• macOS: evermeet.cx

🧩 Future Enhancements (Planned)

• 📁 Per-album output folders

• 💾 Remember last user settings

• 🟢 Per-file success / error indicators

• 🧱 Windows .exe build (PyInstaller)

• 🎵 Batch queue reordering

👨‍💻 Developed By Aryan Singh Negi

📄 License

This project is open-source and available under the MIT License.