Mp3tag showing “wrong” metadata on M4B files

[Florian]

I've written a separate topic on the current state of iTunes/QuickTime and Nero metadata for MP4/M4A/M4B in Mp3tag, with the intention to answer all questions and shed some light into the issues described in this topic:

MP4/M4A/M4B: iTunes/QuickTime and Nero metadata

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…