I’ve been able to use mp3tag to update chapter titles for m4b files, and it’s updated in VLC but not iTunes or the audiobook player I use. (BookPlayer on Iphone) The problem seems to be the player using the Itunes/Quicktime metadata and not the Nero metadata after looking it up. I’ve looked in FAQ…

Yes, Mp3tag can't edit QuickTime chapters at the moment — only reading and removing QuickTime chapters is supported. On writing, Mp3tag creates a copy of the existing chapter data as Nero chapters. These chapters are used at further edits, which also implies that the original QuickTime chapters can …

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Help with m4b files

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ohrenkino December 13, 2025, 2:04pm 2

Lovisa96:

no way to edit or delete the Itunes/Quicktime metadata

See e.g. here:

Deleting QuickTime chapter titles in an m4b Support

Have you tried Utils → Strip MP4 chapters from the right-click menu of the file? This should remove the chapter information from the file. Mp3tag has no support for editing the QuickTime chapters, but removing chapter information and reading from it should work just fine.

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