Troubleshooting a transcoding issue.

General Discussions
1

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- 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?

2

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.

3

And the media??
What who why format etc etc

4

thanks @spikemixture

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