# Leading zeros are not possible with automatic and manual track numbering

**URL:** https://community.mp3tag.de/t/leading-zeros-are-not-possible-with-automatic-and-manual-track-numbering/66532
**Category:** Support
**Created:** [November 16, 2024, 8:53am UTC](https://community.mp3tag.de/t/leading-zeros-are-not-possible-with-automatic-and-manual-track-numbering/66532 "2024-11-16T08:53:42Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [November 16, 2024, 8:56am UTC](https://community.mp3tag.de/t/leading-zeros-are-not-possible-with-automatic-and-manual-track-numbering/66532/3 "2024-11-16T08:56:56Z")

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It's unfortunately not possible with the MP4/M4A format. Track numbers are stored as integer values there (basically a number) in the file instead of a numeric string (like "01") as with MP3 or FLAC.

If you want to use leading zeros when renaming files, you can always use `$num(%track%,2)` instead of `%track%`

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_[View the full topic](https://community.mp3tag.de/t/leading-zeros-are-not-possible-with-automatic-and-manual-track-numbering/66532)._