PLEX 4K - Slow

[Jacopx]

Hi, I start saying that I'm crazy and I like to test the power of my system and this is an extreme situation.

I have just downloaded a native 4K (~60 Mbps for 60 GB) and an upscaled 4K (~18 Mbps for 15 GB) files, the files are now in my PMS. If i try to play (with transcoding) the upscaled one I can reach 5 times of co-reproduction without problem, the CPU usage is around 70-80% and system load (1 min) is 20.00 and the RAM is used for 2GB for reproduction (~10GB) and I think that my configuration can manage 2 more reproduction but I haven't enough RAM.

When I try to reproduce the native one if I play it from iPhones also two it's work very fine. If I launch a SINGLE repro from my Mac or from my PS4 (same setting from the trasconding [20mbps 1080p]) is not fluid and is the same with 2 co-repro. Why I have this problem? As you can see my hardware is not under super heavy load is all around 70-80% (the peaks are when I have started the second reproduction)

Somebody can explain to me why? :)

 

[nightshade00013]

Right now the PS4 does not support 4k resolutions so more than likely the problem is on it's end and the mac may also have some sort of an issue that is close to the same. I have some 4k content and it streams direct to my 4K tv's plex app with no problems and around 45% cpu, streaming to my pc through the web app is the same use but I can see where it is transcoding down with artifacts every so often.

Streaming over Local WiFi to my LG V10 has no stuttering or issues. With 50% CPU usage.

This is using an MKV file 1.91GB 31 minutes in length 8615kbps so the system transcodes no matter what but wouldn't with a MP4.

 

[Jacopx]

Right now the PS4 does not support 4k resolutions so more than likely the problem is on it's end and the mac may also have some sort of an issue that is close to the same. I have some 4k content and it streams direct to my 4K tv's plex app with no problems and around 45% cpu, streaming to my pc through the web app is the same use but I can see where it is transcoding down with artifacts every so often.

Streaming over Local WiFi to my LG V10 has no stuttering or issues. With 50% CPU usage.

This is using an MKV file 1.91GB 31 minutes in length 8615kbps so the system transcodes no matter what but wouldn't with a MP4.

Yeah, i know that my devices can't use 4K in why I need to transcode it in 1080p, but I can't understand the difference between the device [emoji53]

 

[nightshade00013]

It's possible that the plex app is showing as being able to use 4k on the device and then having to downscale locally. Since it is happening on one device and not another however this is something they will be more able to help with on the plex forums however.