# How to create Action for Convert Filename - Tag
**URL:** https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692
**Category:** Support
**Created:** [January 15, 2018, 11:03am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692 "2018-01-15T11:03:33Z")
**Posts on this page:** 16
**Page:** 1
### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 11:03am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/1 "2018-01-15T11:03:33Z")
Hello! I'm struggling to make a full automation of changes in my fields. I want to create an Action that converts Filename into Tag. I know I can do it manually in the converter, but I wanted to make it using Actions.
Eg. 100 - File.mp3
> > Track: 100
Also, I'd like to fill blank Genres with a specific word, like "Unknown". I tried to create a regular expression, but I'm not able to leave the field blank.
Thanks!
---
### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 15, 2018, 11:08am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/2 "2018-01-15T11:08:53Z")
The action equivalent for the convert functions is an action of the type "Guess value" for
Source: %\_FILENAME%
Guessing pattern: %track% - %dummy%
To fill genres with "unknown", use an action of the type "Format value" for GENRE
Format String: Unknown
---
### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 11:18am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/3 "2018-01-15T11:18:13Z")
> [@ohrenkino](#):
>
> The action equivalent for the convert functions is an action of the type "Guess value" for
> Source: %\_FILENAME%
> Guessing pattern: %track% - %dummy%
>
> To fill genres with "unknown", use an action of the type "Format value" for GENRE
> Format String: Unknown
Thanks for the help!
I just need some changes now. I wanted that the track could be in the format "77", when the filename is 077. How could I do it?
And about the Genre doubt, I'll try to explain again. I want to select all tracks at once and play that action. Some of the tracks have empty Genres, and I would like to replace empty blank spaces with the word "Unknown". Can I do it?
If you are willing to help me with this one last question:
I also want to replace the value of COPYRIGHT with the same COPYRIGHT value, with the marker "℗ " before. How can I do that? Thank you in advance!
---
### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 15, 2018, 11:24am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/4 "2018-01-15T11:24:16Z")
> [@Henrique Barcelos](#):
>
> Thanks for the help!
>
> I just need some changes now. I wanted that the track could be in the format "77", when the filename is 077. How could I do it?
Action "FOrmat value" for track
Format string: $num(%track%,1)
> [@Henrique Barcelos](#):
>
> And about the Genre doubt, I'll try to explain again. I want to select all tracks at once and play that action. Some of the tracks have empty Genres, and I would like to replace empty blank spaces with the word "Unknown". Can I do it?
Format value for GENRE
Format string: $if2(%genre%,unknown)
> [@Henrique Barcelos](#):
>
> If you are willing to help me with this one last question:
>
> I also want to replace the value of COPYRIGHT with the same COPYRIGHT value, with the marker "℗ " before. How can I do that? Thank you in advance!
see faqs: [/t/967/1](https://community.mp3tag.de/t/967/1)
---
### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 11:34am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/5 "2018-01-15T11:34:16Z")
> [@ohrenkino](#):
>
> Action "FOrmat value" for track
> Format string: $num(%track%,1)
>
> Format value for GENRE
> Format string: $if2(%genre%,unknown)
>
> see faqs: [/t/967/1](https://community.mp3tag.de/t/967/1)
Thank you! But the second code did not work, it did not filled empty genres with the word Unknown. Could you please check that?
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 15, 2018, 11:40am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/6 "2018-01-15T11:40:15Z")
> [@Henrique Barcelos](#):
>
> Thank you! But the second code did not work, it did not filled empty genres with the word Unknown. Could you please check that?
I can't at the moment - I would try
$if2(%genre%,'unknown')
---
### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 11:42am UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/7 "2018-01-15T11:42:54Z")
> [@ohrenkino](#):
>
> I can't at the moment - I would try
> $if2(%genre%,'unknown')
Didn't work either.. ☹
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 15, 2018, 12:00pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/8 "2018-01-15T12:00:04Z")
> [@Henrique Barcelos](#):
>
> Didn't work either.. ☹
This is a little astounding - I found a thread with a very similar problem and a very similar solution:
[/t/19099/1](https://community.mp3tag.de/t/19099/1)
Are you sure that you used $if2() and not just $if()?
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### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 12:06pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/9 "2018-01-15T12:06:57Z")
> [@ohrenkino](#):
>
> This is a little astounding - I found a thread with a very similar problem and a very similar solution:
> [/t/19099/1](https://community.mp3tag.de/t/19099/1)
>
> Are you sure that you used $if2() and not just $if()?
Yes, I'm sure. The thing is that the funcion compares if it exists, while it shoud return Y, if X doesn't exist, which is, return Unknown if %genre% doesn't exist..
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 15, 2018, 12:13pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/10 "2018-01-15T12:13:24Z")
> [@Henrique Barcelos](#):
>
> Yes, I'm sure. The thing is that the funcion compares if it exists, while it shoud return Y, if X doesn't exist, which is, return Unknown if %genre% doesn't exist..
Oh, I see.
so perhaps
$if($eql(%genre%,),Unknown,%genre%)
---
### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 12:31pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/11 "2018-01-15T12:31:36Z")
> [@ohrenkino](#):
>
> Oh, I see.
> so perhaps
> $if($eql(%genre%,),Unknown,%genre%)
It didn't work. I tried $if($eql(%genre%,),'Unknown',%genre%), but no success. 😕
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 15, 2018, 12:51pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/12 "2018-01-15T12:51:02Z")
> [@Henrique Barcelos](#):
>
> It didn't work. I tried $if($eql(%genre%,),'Unknown',%genre%), but no success. 😕
I don't know what you are doing because I just tested it and both work:
if2(%genre%,'unknown') -\> no genre = "unknown" otherwise the genre string e.g. "Blues"
$if($eql(%genre%,),'Unknown',%genre%) -\> same here
So: where and how do you apply the expressions?
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### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 1:27pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/13 "2018-01-15T13:27:18Z")
> [@ohrenkino](#):
>
> I don't know what you are doing because I just tested it and both work:
>
> if2(%genre%,'unknown') -\> no genre = "unknown" otherwise the genre string e.g. "Blues"
> $if($eql(%genre%,),'Unknown',%genre%) -\> same here
>
> So: where and how do you apply the expressions?
I understood what's happening. I tried the function isolated, and it worked. But it didn't work among other functions in a single Action. I've uploaded my actions. Do you know why?
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [January 15, 2018, 1:51pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/14 "2018-01-15T13:51:40Z")
> [@Henrique Barcelos](#):
>
> I understood what's happening. I tried the function isolated, and it worked. But it didn't work among other functions in a single Action. I've uploaded my actions. Do you know why?
What I notice is that you replace text constants like "Brasilianische Musik;" with the pattern matching replace with regular expression although you do not use a regular expression. A simple replace would be enough.
What I would try: move the new action upwards in the order and see whether it works.
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### Author:  [@henriquebs12](https://community.mp3tag.de/u/henriquebs12)
#### Post date: [January 15, 2018, 2:24pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/15 "2018-01-15T14:24:12Z")
> [@ohrenkino](#):
>
> What I notice is that you replace text constants like "Brasilianische Musik;" with the pattern matching replace with regular expression although you do not use a regular expression. A simple replace would be enough.
>
> What I would try: move the new action upwards in the order and see whether it works.
Thank you! You're a genius. Worked like a charm.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:27pm UTC](https://community.mp3tag.de/t/how-to-create-action-for-convert-filename-tag/19692/16 "2026-02-09T12:27:11Z")