# FreeNAS - Plex Media Server CODEC issue
**URL:** https://forums.plex.tv/t/freenas-plex-media-server-codec-issue/878327
**Category:** Plex Media Server
**Tags:** server-truenas
**Created:** [May 23, 2024, 9:41am UTC](https://forums.plex.tv/t/freenas-plex-media-server-codec-issue/878327 "2024-05-23T09:41:59Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@snake3y3s\_za](https://forums.plex.tv/u/snake3y3s_za)
#### Post date: [May 23, 2024, 9:41am UTC](https://forums.plex.tv/t/freenas-plex-media-server-codec-issue/878327/1 "2024-05-23T09:41:59Z")
Server Version#: 1.40.2.8395
Player Version#: 4.125.1
I have a newly installed plex media server using Danb’s scripted installer.
When I try run certain clips, I get the following error.
It may just be a permissions issue, but then I need assistance with setting it up correctly.
otherwise, does anyone have any suggestions?
Maybe I can manually add the codec?
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### Author:  [@snake3y3s\_za](https://forums.plex.tv/u/snake3y3s_za)
#### Post date: [May 26, 2024, 5:23pm UTC](https://forums.plex.tv/t/freenas-plex-media-server-codec-issue/878327/2 "2024-05-26T17:23:07Z")
Just checked… all the files failing to play appear to be .MKV files.
I read somewhere that Plex doesn’t play .MKV
if this is the case…
WHY???
Its been years now that Plex has been running… why is this still a thing?
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### Author:  [@system](https://forums.plex.tv/u/system)
#### Post date: [August 24, 2024, 5:24pm UTC](https://forums.plex.tv/t/freenas-plex-media-server-codec-issue/878327/3 "2024-08-24T17:24:06Z")
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