tone is a cross platform audio tagger and metadata editor to dump and modify metadata for a wide variety of formats, including mp3, m4b, flac and more. It has no dependencies and can be downloaded as single binary for Windows, macOS, Linux and other common platforms.
tone --version 0.1.9
tone tag --auto-import=ffmetadata Example.mp3 Error: Object reference not set to an instance of an object.
tone-0.1.6-linux-x64/tone tag --auto-import=ffmetadata Example.mp3
Works just fine.
The following is missing from the documentation, I had found it in a bug report. --auto-import=ffmetadata