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.
- 🎧 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.jpgfor 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
| Output Format | Quality | Album Art |
|---|---|---|
| OPUS | Best (VBR) | ❌ Not supported (cover.jpg extracted) |
| AAC (M4A) | 256 kbps | ✅ Embedded |
| MP3 | V0 (Highest) | ✅ Embedded |
- Python 3.9+
- Internet connection (only for first-time FFmpeg auto-download)
pip install PyQt6FFmpeg is automatically downloaded if not found on your system.
python app.py-
Select output format (OPUS / AAC / MP3)
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Drag & drop FLAC files or folders
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Choose output directory
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Click Start Conversion
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OPUS strictly disables video streams (-vn) to avoid container errors
-
AAC & MP3 support embedded MJPEG album art
-
Uses QProcess for non-blocking FFmpeg execution
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Safe stream mapping (-map 0:a, -map 0:v?)
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Cross-platform FFmpeg binaries:
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Windows: gyan.dev
-
Linux: johnvansickle.com
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macOS: evermeet.cx
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📁 Per-album output folders
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💾 Remember last user settings
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🟢 Per-file success / error indicators
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🧱 Windows .exe build (PyInstaller)
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🎵 Batch queue reordering
This project is open-source and available under the MIT License.