# Batch file tag processing?
**URL:** https://community.mp3tag.de/t/batch-file-tag-processing/1629
**Category:** General Discussion
**Created:** [January 17, 2005, 1:30am UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629 "2005-01-17T01:30:40Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@pilaar39](https://community.mp3tag.de/u/pilaar39)
#### Post date: [January 17, 2005, 1:30am UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/1 "2005-01-17T01:30:40Z")
I am looking for a tag editor that can process multiple files at once. Someone suggested MP3TAG to me, but I am not sure it will do what I need. Can someone please advise before I download?
I am looking to modify a tag with sequential numbering. For example, I wish to change all the TITLE tags for all the files in an audiobook to Chapter ##, where ## equals 01, 02, 03, etc. in sequence.
Is this possible with MP3TAG?
If so, how? If not, can someone suggest a program that will do this?
Paul
---
### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [January 17, 2005, 11:43am UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/2 "2005-01-17T11:43:21Z")
Hello Paul!
Welcome to the forums 🙂
Yes, this is possible with the latest [Development Build](http://developer.mp3tag.de) of Mp3tag.
Just [create a new action](https://community.mp3tag.de/t/967/1) Format value, set the field to **TITLE** and use the formatstring $num(%\_counter%,2)
Simply apply this action to the files of an audiobook 🙂
Best regards,
~ Florian
---
### Author:  [@pilaar39](https://community.mp3tag.de/u/pilaar39)
#### Post date: [January 17, 2005, 1:23pm UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/3 "2005-01-17T13:23:14Z")
Florian, many thanks for the quick reply...
I presume by usiing this code like:
Chapter $num(%\_counter%,2)
will generate Chapter 01, Chapter 02, etc.
and by changing it to:
Chapter $num(%\_counter%,3)
will generate Chapter 001, Chapter 002, etc.
Is this correct?
Secondly, am I to assume the sequence will always start at '01'?
Is it possible to set the initial value to the sequence, so that I can for example, re-number the tag from Chapter 100 onwards?
Paul
---
### Author:  [@Sebastian\_Mares](https://community.mp3tag.de/u/Sebastian_Mares)
#### Post date: [January 17, 2005, 2:29pm UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/4 "2005-01-17T14:29:38Z")
> [@](#):
>
> Florian, many thanks for the quick reply...
>
> I presume by usiing this code like:
> Chapter $num(%\_counter%,2)
>
> will generate Chapter 01, Chapter 02, etc.
>
> and by changing it to:
> Chapter $num(%\_counter%,3)
>
> will generate Chapter 001, Chapter 002, etc.
>
> Is this correct?
>
> Secondly, am I to assume the sequence will always start at '01'?
>
> Is it possible to set the initial value to the sequence, so that I can for example, re-number the tag from Chapter 100 onwards?
>
> Paul
>
> \<{POST\_SNAPBACK}\>
Your supposition is correct.
In order to start the counter at 100, you could use the $add() function.
```
$num($add(%_counter%,100),4)
```
The above will write 0100, 0101, 0102, 0103...
---
### Author:  [@pilaar39](https://community.mp3tag.de/u/pilaar39)
#### Post date: [January 17, 2005, 7:56pm UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/5 "2005-01-17T19:56:19Z")
hmmm..
well, I created a new action to add a 3 digit track sequence. When I ran the action, it added the _same_ string "4294967295" to the track tag in all files! (instead of 001, 002, 003, etc sequentially)
The content of my action is;
Field: TRACK
format string: $num(%\_counter%,3)
What am I doing wrong???
Paul
---
### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [January 17, 2005, 7:58pm UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/6 "2005-01-17T19:58:14Z")
Which version of Mp3tag are you using?
---
### Author:  [@pilaar39](https://community.mp3tag.de/u/pilaar39)
#### Post date: [January 17, 2005, 11:09pm UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/7 "2005-01-17T23:09:22Z")
2.27 Build Dec. 06,2004
I just downloaded it from this site yesterday
pl
> [@](#):
>
> Which version of Mp3tag are you using?
>
> \<{POST\_SNAPBACK}\>
---
### Author:  [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [January 18, 2005, 1:49am UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/8 "2005-01-18T01:49:40Z")
As Florian said, you need to install the latest [Development Build](http://developer.mp3tag.de), the version on the main page does not have this feature yet.
---
### Author:  [@pilaar39](https://community.mp3tag.de/u/pilaar39)
#### Post date: [January 18, 2005, 4:35pm UTC](https://community.mp3tag.de/t/batch-file-tag-processing/1629/9 "2005-01-18T16:35:16Z")
Weird.. I downloaded the 2.27e build and had to install it several times before it actually replaced the 2.27 build
Anyway, it is now working perfectly.. I was able to sequentially renumber the title and track fields with a sequential number.
THANKS! for all you help and a great little tool.
pl