Action to extract information from the title

[Bomba]

Hello, I have a lot of mp3s in which the title is structured as follows:

Hootology (Feat. BoriRock & Shaykh Hanif) (Remix) [Prod. By 4th Beats]

I would like to use an action to copy the following information from them:

%artists% : BoriRock & Shaykh Hanif
%composer% : 4th Beats

I can do it with tag - tag but not with an action

tag - tag

ARTISTS
$regexp(%title%,'.*? \(Feat\. (.*?)\).*',$1)

COMPOSER
$regexp(%title%,'.*?\[Prod\. By (.*?)\]',$1)

Can you help me with how I can pack this into an action?

[ohrenkino]

@Bomba

I can do it with tag - tag but not with an action

The action equivalent to Convert>Tag-Tag is an action of the type "Format value"

BTW: this information was made available to you already in this thread:

Replace (Prod by XXX) to [Prod. by XXX]

Scripting functions can be used in format strings. So an action of the type "Format value" would be good. Or the Converter>Tag-Tag. You have not yet mentioned which field you want to modify.

[LyricsLover]

Action from type "Format Value" that looks like this:

the same for COMPOSER with your second regular expression as Format string.

Results in

[Bomba]

I just noticed another problem.

If the title doesn't have (Feat. xyz) and/or [Prod. By xyz], the whole title is copied. Can this be prevented?

[LyricsLover]

@Bomba

Can this be prevented?

Only if you adjust your regular expression.
A regular expression does not work for every variation.
You can either use several different regular expressions (and Actions) or you can try to fine-tune your existing one. Even this will not work for every thinkable form of TITLE content.

[Bomba]

Do you have any idea how to check whether the title includes Feat. and/or Prod.?

[LyricsLover]

Sorry, you have to build your examples and try it by your self, for example with the help of online tools like regex101.com.
I would have to do the same.

[ohrenkino]

@Bomba

check whether the title includes Feat. and/or Prod.?

The easiest way would be to apply filters and then treat only matching files.

[Bomba]

that works

$if($eql($regexp(%title%,'.*? \(Feat\. (.*?)\).*','$1'),%title%),, $regexp(%title%,'.*? \(Feat\. (.*?)\).*','$1'))  

[LyricsLover]

Please test your functions and regular expressions carefully.
Your above THEN part would at least add a space in front of the extracted part, because of
,, $regexp
↑
Every character counts.