# Tags not saved in mp4 files

**URL:** https://community.mp3tag.de/t/tags-not-saved-in-mp4-files/14151
**Category:** Support
**Created:** [November 21, 2012, 3:33pm UTC](https://community.mp3tag.de/t/tags-not-saved-in-mp4-files/14151 "2012-11-21T15:33:27Z")
**Posts on this page:** 1
**Showing post:** 12

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### 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: [February 7, 2013, 11:00am UTC](https://community.mp3tag.de/t/tags-not-saved-in-mp4-files/14151/12 "2013-02-07T11:00:10Z")

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There is a German thread that reports about problems when writing tags in MP4 files:  
[[X] Tags von SimpleMovieX werden nicht erkannt - Datei konnte nicht zum Schreiben geöffnet werden](https://community.mp3tag.de/t/14389/2)

Apparently, the "File has no MPEG4 IOD/OD" message is important. And perhaps you can check this in your files.

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