# How to find/enter missing metatag values
**URL:** https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669
**Category:** Support
**Created:** [April 10, 2023, 8:18pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669 "2023-04-10T20:18:09Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@dec](https://community.mp3tag.de/u/dec)
#### Post date: [April 10, 2023, 8:18pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/1 "2023-04-10T20:18:09Z")
for example i see some records (no pun intended) are missing Codec data, and nowi find i have many null Year values
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [April 10, 2023, 8:20pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/2 "2023-04-10T20:20:10Z")
> [@dec](#):
>
> are missing Codec data
These files are usually corrupt or have an unsupported format.
For more information about filters, see (really!)
> **[Filter and Search – Mp3tag Documentation](https://docs.mp3tag.de/filter/)**
>
> Documentation on Filter and Search and keywords to form complex filter expressions. Mp3tag is the universal Tag Editor.
Here are suggestions on tools to check files for problems:
> [@How to check files for errors?](https://community.mp3tag.de/t/how-to-check-files-for-errors/44633):
>
> It’s required and often helps to reduce support cycles to check files for errors before filing a bug report. Symptoms of erroneous files are often missing or wrong bitrate or length audible blips or skips tags seem to be sticky and cannot be removed There are some really good tools to check the files for errors, namely MP3 Diags — identifies many different issues in MP3 files Website: [http://mp3diags.sourceforge.net](http://mp3diags.sourceforge.net) Download: [MP3 Diags - Getting MP3 Diags](http://mp3diags.sourceforge.net/010_getting_the_program.html#binWindows) If the font size in MP3 Diags is …
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### Author:  [@MotleyG](https://community.mp3tag.de/u/MotleyG)
#### Post date: [April 10, 2023, 8:38pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/3 "2023-04-10T20:38:58Z")
Any of the file technical information (i.e. fields that start with an underscore character like `%_bitrate%`) cannot be written, but are pulled from the file info itself. If these are missing, they were not written by the original software.
Metadata values that can be written or changed like `Year` can be updated by several methods. Of course you can manually override these yourself, or use one of the automated tools if they apply.
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### Author:  [@dec](https://community.mp3tag.de/u/dec)
#### Post date: [April 10, 2023, 8:47pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/4 "2023-04-10T20:47:16Z")
noted. thank you.
sourceforge and Github, binaries etc, i find a bit difficult/impossible, but i give that a go
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [April 10, 2023, 8:50pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/5 "2023-04-10T20:50:17Z")
> [@dec](#):
>
> sourceforge and Github, binaries etc
The alternative is to delete the files that show no codec.
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### Author:  [@dec](https://community.mp3tag.de/u/dec)
#### Post date: [April 10, 2023, 9:12pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/6 "2023-04-10T21:12:01Z")
so they cannot be matched and imported from some source?
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### Author:  [@MotleyG](https://community.mp3tag.de/u/MotleyG)
#### Post date: [April 10, 2023, 9:54pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/7 "2023-04-10T21:54:12Z")
They cannot be edited.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [May 10, 2023, 9:54pm UTC](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/8 "2023-05-10T21:54:58Z")
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