# Problem playing video 'codec'

**URL:** https://forums.plex.tv/t/problem-playing-video-codec/923220
**Category:** Plex Media Server
**Tags:** server-synology
**Created:** [June 16, 2025, 5:40pm UTC](https://forums.plex.tv/t/problem-playing-video-codec/923220 "2025-06-16T17:40:46Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Dakub](https://avatars.discourse-cdn.com/v4/letter/d/9f8e36/32.png) [@Dakub](https://forums.plex.tv/u/Dakub)
#### Post date: [June 16, 2025, 5:40pm UTC](https://forums.plex.tv/t/problem-playing-video-codec/923220/1 "2025-06-16T17:40:46Z")

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Server Version#: 1.41.8.9834  
Player Version#: 4.147.1

Hi everyone,

I have a problem with the codec when I play videos : ‘[Req#120d/Transcode] Error configuring transcoder: Decoder install failed: h264’

 ![image](https://global.discourse-cdn.com/plex/original/4X/b/8/b/b8b0bc802beeec576805f5db7d1ca9fcdf845859.png)

I try to rename the folder ‘Codecs-old’, restart PMS, but I have still the problem ☹

Log :  
[Plex Media Server.zip](https://forums.plex.tv/uploads/short-url/tkRJIPOahL8DaLrDgOmKZAQKxxO.zip) (53.4 KB)

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### Author: ![MovieFan](https://avatars.discourse-cdn.com/v4/letter/m/779978/32.png) [@MovieFan](https://forums.plex.tv/u/MovieFan)
#### Post date: [June 17, 2025, 5:19am UTC](https://forums.plex.tv/t/problem-playing-video-codec/923220/2 "2025-06-17T05:19:41Z")

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Your server is having issues connecting to plex.tv to grab the required codecs. This is a networking issue on your server.

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<div class="post-metadata">

### Author: ![Dakub](https://avatars.discourse-cdn.com/v4/letter/d/9f8e36/32.png) [@Dakub](https://forums.plex.tv/u/Dakub)
#### Post date: [June 17, 2025, 2:32pm UTC](https://forums.plex.tv/t/problem-playing-video-codec/923220/3 "2025-06-17T14:32:30Z")

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Hi,

It’s was that, thank you!

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### Author: ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)
#### Post date: [September 15, 2025, 2:33pm UTC](https://forums.plex.tv/t/problem-playing-video-codec/923220/4 "2025-09-15T14:33:30Z")

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