# MP4-Tags with superfluous null bytes at the end are not shown in MP3TAG **URL:** \ **Category:** Support\ **Created:** [February 28, 2022, 11:14pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526 "2022-02-28T23:14:47Z")\ **Posts on this page:** 7\ **Page:** 2
**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:** [March 2, 2022, 12:33pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526/21 "2022-03-02T12:33:58Z")
Why are you still using iTunes for tagging after all what we did for you in this topic? ๐Ÿ˜… I've edited `ALBUMARTISTSORT` in Mp3tag and it worked without problems. ---
**Author:** ![webshield](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/w/cab0a1/32.png) [@webshield](https://community.mp3tag.de/u/webshield)\ **Post date:** [March 2, 2022, 1:44pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526/22 "2022-03-02T13:44:00Z")
Yes, you're absolutley right! I'm sorry, why did I use iTunes? ๐Ÿ˜† I used iTunes for too many years and got used to it. But there is really no reason any more. I don't have any Apple device. And since iTunes messed up my library so much, I'm surely going away from iTunes and won't let it manage and sync my music any more. This is great, I will of course use MP3Tag now ๐Ÿ˜€ I'll have to look a little more into it. Maybe I can even solve this automatically for all my files with your tool through an RegEx-Expression. Thanks again for looking into all of this and helping out so much! ---
**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:** [March 2, 2022, 1:47pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526/23 "2022-03-02T13:47:49Z")
> [@webshield](#): > > Maybe I can even solve this automatically > [@webshield](#): > > I tried in iTunes manually copying the Album/Kรผnstler into the AlbumPerformer/sort field, Here is a post from the HowTos how to copy one tag field into another: > [@Actions and batch-operations](https://community.mp3tag.de/t/actions-and-batch-operations/967/15): > > How to copy one field value to another field? Example how to copy the content of the ARTIST field to the ALBUMARTIST field: Create a [new action](https://community.mp3tag.de/t/actions/967/2) in an existing action group or make a new action group. Action type: Format value Field: ALBUMARTIST Format string: %artist% Note: If you want to copy all possible values of a field (in case you have multiple artist fields), the internal scripting function [$meta\_sep](https://docs.mp3tag.de/scripting) can be used in the format string, e.g., $meta\_sep(artist,\\\\) ---
**Author:** ![MotleyG](https://community.mp3tag.de/user_avatar/community.mp3tag.de/motleyg/32/440_2.png) [@MotleyG](https://community.mp3tag.de/u/MotleyG)\ **Post date:** [March 2, 2022, 2:14pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526/24 "2022-03-02T14:14:06Z")
Even if you have any iDevices and need to keep using iTunes, make sure these preferences in the Advanced tab are both UNchecked to prevent iTunes from modifying or moving any of your files. You can still add new ones by dragging them to the iTunes window or using File\>Add File or File\>Add Folder menus, but now they will stay where you want them, even on separate drives if necessary. ![image](https://community.mp3tag.de/uploads/default/original/2X/3/3b437d04e6adb801d11b9ca70d277689ab3c7900.png) ---
**Author:** ![webshield](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/w/cab0a1/32.png) [@webshield](https://community.mp3tag.de/u/webshield)\ **Post date:** [March 2, 2022, 3:08pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526/25 "2022-03-02T15:08:41Z")
Perfect, thank you very much guys! I see this is a great tool! I'm going to study the HowTo-Section a little more ๐Ÿ˜€ ---
**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:** [March 7, 2022, 6:39pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526/26 "2022-03-07T18:39:12Z")
2 posts were split to a new topic: [Specific MP4 file cannot be opened for writing](https://community.mp3tag.de/t/specific-mp4-file-cannot-be-opened-for-writing/56625) ---
**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\ **Post date:** [April 6, 2022, 6:39pm UTC](https://community.mp3tag.de/t/mp4-tags-with-superfluous-null-bytes-at-the-end-are-not-shown-in-mp3tag/56526/27 "2022-04-06T18:39:48Z")
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