# Nero tag created when making minimal change to M4A file with chapters

**URL:** https://community.mp3tag.de/t/nero-tag-created-when-making-minimal-change-to-m4a-file-with-chapters/56259
**Category:** Support
**Created:** [February 9, 2022, 9:46pm UTC](https://community.mp3tag.de/t/nero-tag-created-when-making-minimal-change-to-m4a-file-with-chapters/56259 "2022-02-09T21:46:27Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![MotleyG](https://community.mp3tag.de/user_avatar/community.mp3tag.de/motleyg/32/440_2.png) [@MotleyG](https://community.mp3tag.de/u/MotleyG)
#### Post date: [February 10, 2022, 3:39pm UTC](https://community.mp3tag.de/t/nero-tag-created-when-making-minimal-change-to-m4a-file-with-chapters/56259/4 "2022-02-10T15:39:53Z")

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@Florian Can you elaborate on this?

> [@Request: Option to disable auto MP4 chapter generation](https://community.mp3tag.de/t/request-option-to-disable-auto-mp4-chapter-generation/44323/2):
>
> I've changed this behavior with [Mp3tag v2.93a](https://community.mp3tag.de/t/455), so that no chpl atom is created automatically if Apple gapless data is found. Thanks for bringing this to my attention!

By "Apple gapless data" are you referencing the legacy ITUNESGAPLESS pgap field that needs to be set to 1? While I don't believe current versions of iTunes specifically uses this any longer, it can still be used and set in mp3tag if that is what is required for keeping the chapters from getting generated.

In the case of the OP's concern, is the indication of "MP4 NERO" just a change of format based on how mp3tag handles chapters in m4a? I don't think there are other specific tags added, just the format change, correct?

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