Convert overdrive audiobooks into a single opus file with chapter and thumbnail information
For downloading overdrive audiobooks check out https://github.com/vcalv/overdrive.sh
- Thumbnail embedding
- Lower bit-rate re-encoding (default is 15 Kbps, 20 Kbps gives excellent results)
- Chapter information retrieved from proprietary overdrive metadata
- Can ignore spurious sub-chapters that exist in many audiobooks
- Speedup of audio (with chapter adjustment)
- Audio (peak one-pass) normalization
- Neural Network filter to isolate voice from all sorts of background sound/noise (requires external download made on the fly and cached)
- python3
- ffmpeg executable, no python bindings needed
- opusenc executable
- python-appdirs
- python-rich