Command to extract coverart from mp3

Is there a command to extract cover from music files ?
I need to extract all cover from selected files.

I think the best way to batch-extract cover-art from MP3s into image files is using this tool I wrote: Set/Clear/Extract WMA/MP3 Cover-art + Populate AlbumArtist.

(The same tool can also do the reverse, but Opus itself is probably better at that now. It was written before Opus had that functionality.)

Many thanks for your tool, it's perfect... but i request to add this command natively.