[Divingduck]

First setup a custom column as shown in the linked post (Preferences -> Interface -> Add your own columns) and after restarting calibre you can use the cmd string:

calibredb list --fields=authors,title,*pathfilename >testpath.txt

in your command line window. In the post you will find a link to calibre's help section too.

Remark: I just recognize there was a little typo in my linked post. author need to be change to authors