# \[F\] Unknown MP4 atoms are deleted on save

**URL:** https://community.mp3tag.de/t/f-unknown-mp4-atoms-are-deleted-on-save/10637
**Category:** Fixed Bugs
**Tags:** bug-fixed
**Created:** [August 12, 2010, 1:34pm UTC](https://community.mp3tag.de/t/f-unknown-mp4-atoms-are-deleted-on-save/10637 "2010-08-12T13:34:07Z")
**Posts on this page:** 1
**Showing post:** 14

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### Author: ![edrikk](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/e/c37758/32.png) [@edrikk](https://community.mp3tag.de/u/edrikk)
#### Post date: [January 26, 2011, 1:01am UTC](https://community.mp3tag.de/t/f-unknown-mp4-atoms-are-deleted-on-save/10637/14 "2011-01-26T01:01:31Z")

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Bump, as the issue is still present in 2.48.

Tags that are not recognized by MP3Tag are destroyed upon a save (also see this reported here: [/t/10052/1](https://community.mp3tag.de/t/10052/1)

Also, Florian, can you **please** add first level atom "rate" mp4 (similar to cprt atom) to allow me to reverse the damage cause by the destruction of the tag? I've been waiting 6 months to fix my files. ☹

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