Padding numbers

[Juanca1944]

Hello everyone,

Thanks to finding this wonderful tool, I started reorganizing my music collection. Now I have the possibility to have the correct title and also add the track number, but there are several formats: 3, 03, 3/18, and I want to normalize them to the 03 format, meaning with a leading 0 if necessary.
 
This works in Perl: perl -e 'printf "%02d\n", 3', but when I try to use it with exiftool, I get an error
exiftool -r -ext mp3 '-testName< ${track;sprintf('%02d')} - ${title;}.%e' file
"Warning: Numeric variables with more than one digit may not start with '0' for 'track'",
and I haven't been able to find a solution.

I appreciate anyone who can help me.

Best regards.

[StarGeek]

You have to do the same thing with the quotes as you did in the Perl command, single quotes outside, double quotes inside. That is assuming you're using Mac/Linux.

exiftool -r -ext mp3 '-testName< ${track;sprintf("%02d")} - ${title;}.%e' file

Or escape the interior quotes... at least I think that would work
exiftool -r -ext mp3 '-testName< ${track;sprintf(\'%02d\')} - ${title;}.%e' file

Another option using the Perl Repetition Operator x, no other quotes needed
exiftool -r -ext mp3 '-testName< ${track;$_=0 x(2-length).$_} - ${title;}.%e' file

[Phil Harvey]

I don't see how your track sprintf expression will work.

Try this:  ${track;$_=sprintf("%02d",$_)}

- Phil

[StarGeek]

Ooops, I didn't look closely enough at the rest of it.  I just saw the quotes.

[Juanca1944]

Hello everyone,

First of all, thank you all for your time and for sending your posts.

I did the test, and the result is as follows:

StarGeek's third option works perfectly.

Phil Harvey's option obviously works.

I was also doing my own research, and Regex did the magic
exiftool -r -ext mp3 '-testName< ${track;s/\b(?=\d\b)/0/g;} - ${title;}.%e' FILE

Thanks again and best regards

8->jcf