Automator: "Set PDF Metadata"

i would like to have an answer for that because i also have a lot of pdf that i need to edit their metadata depending on their filename since and doing it one by one is way too time consuming.

i've heard about calibre to edit metadata & i used it for a while & it worked just fine & suddenly it no longer works.

 

oh i figured out what i did wrong.

in calibre, first change the preferences :
adding books - uncheck read metadata from file content rather than filename. and see other options...(you can change author lastname and firstname)

if your filename is {author} - {title} then change the preferences accordingly in the regular expression to (?P<author>[^_]+) - (?P<title>.+). by default it reads it as {title} - {author}.

add the books pdf or epub and then
edit meta data individually or in bulk. it will read metadata from filename
then select pdf & save it to disk (don't forget top save it)