# Mp3tag reads different MP4/M4A tags than Windows Explorer and MusicBee

**URL:** https://community.mp3tag.de/t/mp3tag-reads-different-mp4-m4a-tags-than-windows-explorer-and-musicbee/71540
**Category:** Support
**Created:** [June 30, 2026, 4:20pm UTC](https://community.mp3tag.de/t/mp3tag-reads-different-mp4-m4a-tags-than-windows-explorer-and-musicbee/71540 "2026-06-30T16:20:43Z")
**Posts on this page:** 1
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### Author: ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [June 30, 2026, 4:26pm UTC](https://community.mp3tag.de/t/mp3tag-reads-different-mp4-m4a-tags-than-windows-explorer-and-musicbee/71540/2 "2026-06-30T16:26:20Z")

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Perhaps this thread sheds some light on the observation:

> [@MP4/M4A/M4B: iTunes/QuickTime and Nero metadata](https://community.mp3tag.de/t/mp4-m4a-m4b-itunes-quicktime-and-nero-metadata/69341):
>
> Mp3tag supports two tag formats for MP4/M4A/M4B: iTunes/QuickTime and Nero metadata. When writing metadata, Mp3tag tries to only use iTunes/QuickTime metadata if possible, but writes Nero metadata in the following circumstances: The file already contains Nero metadata. Mp3tag then updates both metadata formats with the updated contents. The file contains QuickTime chapters. Mp3tag can't edit QuickTime chapters at the moment — only reading and removing QuickTime chapters is supported. On w…

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