# MP4 cannot be opened for writing

**URL:** https://community.mp3tag.de/t/mp4-cannot-be-opened-for-writing/19027
**Category:** Support
**Created:** [June 7, 2017, 5:27am UTC](https://community.mp3tag.de/t/mp4-cannot-be-opened-for-writing/19027 "2017-06-07T05:27:36Z")
**Posts on this page:** 1
**Showing post:** 2

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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: [June 7, 2017, 5:35am UTC](https://community.mp3tag.de/t/mp4-cannot-be-opened-for-writing/19027/2 "2017-06-07T05:35:34Z")

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> [@LindaH](#):
>
> ...I cant add a cover no matter what I do. ☹

see e.g. here: [/t/14151/1](https://community.mp3tag.de/t/14151/1)  
sometimes MP4s have to get re-encoded to work.

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