# Mp3tag cannot write to mp4 files

**URL:** https://community.mp3tag.de/t/mp3tag-cannot-write-to-mp4-files/68278
**Category:** Support
**Created:** [April 21, 2025, 12:40pm UTC](https://community.mp3tag.de/t/mp3tag-cannot-write-to-mp4-files/68278 "2025-04-21T12:40:56Z")
**Posts on this page:** 1
**Showing post:** 5

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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: [May 29, 2025, 11:28am UTC](https://community.mp3tag.de/t/mp3tag-cannot-write-to-mp4-files/68278/5 "2025-05-29T11:28:23Z")

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I've just released [Mp3tag v3.30](https://community.mp3tag.de/t/455) and relaxed this recent change that prevents retagging of MP4 files with \> 255 QT chapters to not take effect if the global tag is changed (and not the individual chapters).

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_[View the full topic](https://community.mp3tag.de/t/mp3tag-cannot-write-to-mp4-files/68278)._