# New MP4 Publisher fields not recognized outside of program
**URL:** https://community.mp3tag.de/t/new-mp4-publisher-fields-not-recognized-outside-of-program/62150
**Category:** Support
**Created:** [September 20, 2023, 4:31am UTC](https://community.mp3tag.de/t/new-mp4-publisher-fields-not-recognized-outside-of-program/62150 "2023-09-20T04:31:24Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@tim](https://community.mp3tag.de/u/tim)
#### Post date: [September 20, 2023, 4:31am UTC](https://community.mp3tag.de/t/new-mp4-publisher-fields-not-recognized-outside-of-program/62150/1 "2023-09-20T04:31:24Z")
I recently installed and started using the newest 64 bit version (stable build 3.22, as well as the 3.22a beta) and have really liked using the product. I have primarily been using the program over the past week to write record label data to the Publisher field on MP3 and MP4 tags. I recently realized that the new Publisher fields I was creating on MP4s are not being read/recognized by other programs. Everything seems fine inside of MP3Tag when writing the tag, and the program can re-load and read Publisher data it's previously written.
However, I've tried reading the new tags on an older machine with a 32 bit version of MP3Tag installed (build 3.00), as well as an [asp.net](http://asp.net) console app which leverages the TagLibSharp library to read metadata, but neither of those programs recognized any of the new Publisher fields written on any MP4s. The rest of the fields in the tags were read and appeared as expected, and newly written publisher data existed on all of the affected MP3s. I did not try using any other builds or programs.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [September 20, 2023, 5:24am UTC](https://community.mp3tag.de/t/new-mp4-publisher-fields-not-recognized-outside-of-program/62150/2 "2023-09-20T05:24:42Z")
see here:
> [@MP4 Publisher compatibility](https://community.mp3tag.de/t/mp4-publisher-compatibility/56000):
>
> On version 3.11 support for the MP4 field PUBLISHER was added: [2021-10-29] REL: VERSION 3.11 (for Windows 11/10/8.1/8/7) [2021-10-20] NEW: added support for MP4 fields NARRATOR and PUBLISHER. That means that the Mp3tag name PUBLISHER is now saved to the MP4 frame "©pub" instead of "----:com.apple.iTunes:PUBLISHER" (as described in [Tag Field Mappings – Mp3tag Documentation](https://docs.mp3tag.de/mapping)). This leads to an incompatibility with other software (e.g. foobar2000, MediaInfo), which expect the publisher to be…
Or perhaps better here:
> [@Publisher tag not embedded properly](https://community.mp3tag.de/t/publisher-tag-not-embedded-properly/58545):
>
> Hi. I'm editing tags for my audiobooks (.m4b) and everything works flawlessly except for the Publisher tag. I added a new column and choose field & value %publisher% for it (the %publisher% field is an already available extended field in Mp3tag). I added the values for my audiobooks and hit Save. When I right click on the file and hit Properties, as well as when I load my audiobooks into an audiobook player, the Publisher field is empty. I check the file with MediaInfo, the tag is registered…
as that discussion also picks up the problems of Publisher and Label.
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:30pm UTC](https://community.mp3tag.de/t/new-mp4-publisher-fields-not-recognized-outside-of-program/62150/3 "2026-02-09T12:30:09Z")