# Troubleshooting a transcoding issue.

**URL:** <https://forums.plex.tv/t/troubleshooting-a-transcoding-issue/176062>\
**Category:** General Discussions\
**Created:** [January 16, 2017, 10:54am UTC](https://forums.plex.tv/t/troubleshooting-a-transcoding-issue/176062 "2017-01-16T10:54:08Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![nato1337](https://avatars.discourse-cdn.com/v4/letter/n/d07c76/32.png) [@nato1337](https://forums.plex.tv/u/nato1337)\
**Post date:** [January 16, 2017, 10:54am UTC](https://forums.plex.tv/t/troubleshooting-a-transcoding-issue/176062/1 "2017-01-16T10:54:08Z")

</div>

Hi all,

I have a problem where Plex continually buffers during a transcode, but I’m having problems narrowing down where the actual bottleneck is.

My current plex setup is as follows;  
1x plex server running as a HyperV guest with 8cores, 8124Gb of RAM (running debian)  
1x Synology NAS  
1x CISCO gigabit switch

I have tried the plex server on multiple computers both with an SSD and without. I have now created a RAM drive and have plex transcoding to that to rule out any IO botthlenecks.

I have followed this guide; [https://support.plex.tv/hc/en-us/articles/201575036-Why-is-my-video-stream-buffering-](https://support.plex.tv/hc/en-us/articles/201575036-Why-is-my-video-stream-buffering-) but it wasn’t much help. I don’t have any ‘speed’ strings logged even when verbose logging is turned on.

Plex will buffer when transcoding to web client, android client and to the chromecast as I have tried all 3 individually.

Is there anything else I need to look at?  
Could it be possible that more than a gigabit connection is required from the NAS to the Plex server?

---

<div class="post-metadata">

**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\
**Post date:** [January 16, 2017, 11:00am UTC](https://forums.plex.tv/t/troubleshooting-a-transcoding-issue/176062/2 "2017-01-16T11:00:39Z")

</div>

The one thing you didn’t specify is the CPU. In **almost** all cases, transcoding issues such are you describing because, in spite of total Passmarks, the per-core passmark rating isn’t strong enough.

---

<div class="post-metadata">

**Author:** ![spikemixture](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/spikemixture/32/7233_2.png) [@spikemixture](https://forums.plex.tv/u/spikemixture)\
**Post date:** [January 16, 2017, 1:58pm UTC](https://forums.plex.tv/t/troubleshooting-a-transcoding-issue/176062/3 "2017-01-16T13:58:32Z")

</div>

And the media??  
What who why format etc etc

---

<div class="post-metadata">

**Author:** ![ChuckPa](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/chuckpa/32/79710_2.png) [@ChuckPa](https://forums.plex.tv/u/ChuckPa)\
**Post date:** [January 16, 2017, 2:02pm UTC](https://forums.plex.tv/t/troubleshooting-a-transcoding-issue/176062/4 "2017-01-16T14:02:14Z")

</div>

thanks @spikemixture

I forgot to ask as well as; Subtitles in use?

---

<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, 10:35pm UTC](https://forums.plex.tv/t/troubleshooting-a-transcoding-issue/176062/5 "2020-01-07T22:35:55Z")

</div>