# trailers playback is not working

**URL:** https://forums.plex.tv/t/trailers-playback-is-not-working/204605
**Category:** General Discussions
**Created:** [September 1, 2017, 11:53am UTC](https://forums.plex.tv/t/trailers-playback-is-not-working/204605 "2017-09-01T11:53:53Z")
**Posts on this page:** 4
**Page:** 1

<div class="post-metadata">

### Author: ![dfoster](https://avatars.discourse-cdn.com/v4/letter/d/c5a1d2/32.png) [@dfoster](https://forums.plex.tv/u/dfoster)
#### Post date: [September 1, 2017, 11:53am UTC](https://forums.plex.tv/t/trailers-playback-is-not-working/204605/1 "2017-09-01T11:53:53Z")

</div>

Good day.  
I have a last build of Plex Media server for Mac OS.  
Movie online playback is working fine. But trailers can’t play with error “Conversion encoder or decoder not found.”

How I can fix it?

---

<div class="post-metadata">

### Author: ![Seveen](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/seveen/32/316624_2.png) [@Seveen](https://forums.plex.tv/u/Seveen)
#### Post date: [September 1, 2017, 1:59pm UTC](https://forums.plex.tv/t/trailers-playback-is-not-working/204605/2 "2017-09-01T13:59:54Z")

</div>

hi, what player on what platform are you using ?

---

<div class="post-metadata">

### Author: ![dfoster](https://avatars.discourse-cdn.com/v4/letter/d/c5a1d2/32.png) [@dfoster](https://forums.plex.tv/u/dfoster)
#### Post date: [September 2, 2017, 7:21am UTC](https://forums.plex.tv/t/trailers-playback-is-not-working/204605/3 "2017-09-02T07:21:02Z")

</div>

Chrome Browser  
Plex for iOS

---

<div class="post-metadata">

### Author: ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)
#### Post date: [January 7, 2020, 11:45pm UTC](https://forums.plex.tv/t/trailers-playback-is-not-working/204605/4 "2020-01-07T23:45:20Z")

</div>