pip install Pillow
2. Download all required files (exhale.exe, ffmpeg_vvceasy.exe, mp4box.exe) and put the files into the same folder where .py file is
https://github.com/MartinEesmaa/VVCEasy/blob/master/FFMPEGVVC.md
Or you can download Ready to Use Pack here: https://github.com/Disa-Kizonda/VVC-GUI-Encoder/releases