4k Direct Play Issues

samsung-smart-hub

#1

Hi All looking for some assistance with a plex 4k direct play setup.

Seems like 4k is having buffering issues, ive tried all sorts of manual buffering settings on the APP
works fine to my pc on pmp.

Also can anyone point out any guides or documentation about reading the logs.
and does anyone know if the Samsung smart hub app, has any ability to check media or the buffer %

PMS is hosted on a PowerEdge R710 ESXI Host V 5.50
Windows 7 Host
10vCPU, 16 GB, 140GB SSD
Wired Connectivty, 1gb everywhere. IP 192.168.0.77

Played on a:
UA65HU8500 IP192.168.0.110
Unit has been ugraded with the
One Connect Evoloution kit SEK2500

Media is

Files

K:_Jason Bourne (2016) 2160p 4K UltraHD BluRay (x265 HEVC 10bit) 2ch AC3__Jason Bourne (2016) 2160p 4K UltraHD BluRay (x265 HEVC 10bit) 2ch AC3_.mkv
Media

Video Resolution 4K
Duration 2:03:36
Bitrate 60180 kbps
Width 3840
Height 2160
Aspect Ratio 1.78
Container MKV
Video Frame Rate 24p
Video Profile main 10
Part

Duration 2:03:36
File Jason Bourne (2016) 2160p 4K UltraHD BluRay (x265 HEVC 10bit) 2ch AC3.mkv
Size 51.96 GB
Container MKV
Video Profile main 10
Codec HEVC
Bitrate 59540 kbps
Bit Depth 10
Chroma Subsampling 4:2:0
Color Range tv
Color Space smpte170m
Frame Rate 23.976 fps
Height 2160
Level 6.1
Profile main 10
Ref Frames 1
Width 3840
Codec AC3
Channels Stereo
Bitrate 640 kbps
Audio Channel Layout stereo
Sampling Rate 48000 Hz
Title Stereo


#2

Hi all,
just got myself a Samsung UE49KU6400 and looking into the 4k movies. it looks like even if im direct play the video (even with 90gb) files i seems to be transcoding truehd and dts audio and that buffers quite a lot! any tips please??


#3

First of all any 4K in a MKV container will be transcoded by Plex.
Re-mux the file to mp4..


#4

@tarnecki said:
Hi all,
just got myself a Samsung UE49KU6400 and looking into the 4k movies. it looks like even if im direct play the video (even with 90gb) files i seems to be transcoding truehd and dts audio and that buffers quite a lot! any tips please??

KU6400 it's a 2016 model for which the app is developed by Plex team not Orca. You should try post you question over here : https://forums.plex.tv/categories/smart-tvs
Samsung tv does support DTS without transcoding, not the TrueHD though, as far as I know.

@jjrjr1 said:
First of all any 4K in a MKV container will be transcoded by Plex.
Re-mux the file to mp4..

I beg to differ, I play 4K in a MKV format in direct play with no problems. Transcoding could be caused by subtitles that are not supported by the tv and plex has to transcode them to a format suported by the tv.
My setup can play 4K at 61379kbps without any trouble or buffering; W7, Plex 1.5.3.3580, Tv JU7500. All played over WiFi R6300v1 router on DD-WRT firmware. Tv is on the main level, router on the second level.


#5

Hmmm.
I did not know WiFi could support that bitrate..
What happens when a second device tries to play one of those??


#6

KU6400 it's a 2016 model for which the app is developed by Plex team not Orca. You should try post you question over here : https://forums.plex.tv/categories/smart-tvs
Samsung tv does support DTS without transcoding, not the TrueHD though, as far as I know.

There's no selected subtitles when the video is being played so yes bit strange if DTS is supported - i even tried to enable DTS with app preferences - didn't make any difference.

I will post the question to the other section - thanks!


#7

my issue is buffering with direct play, confirmed on the status window, i can only assume that the TV cant handle direct playing the media


#8

4K can only be played if:
- The video format is Samsung compatible.
- The playback mode is set to Direct Play

If you select a file that has embedded subtitles that needs transcoding, this will not work.
The only option then is to extract the subtitles into and external .srt file and remove the subtitle track from the video.


#9

@Orca said:
4K can only be played if:
- The video format is Samsung compatible.
- The playback mode is set to Direct Play

If you select a file that has embedded subtitles that needs transcoding, this will not work.
The only option then is to extract the subtitles into and external .srt file and remove the subtitle track from the video.

Hi Orca,

The Media does not have any subtitles.
And I can confirm 100% it's using direct play, but I'm still having buffering issues
can you advise as to why the buffering is occurring, or what additional things you would suggest to resolve ?

does the plex Samsung app have any detailed logs that describe why the issue may be occurring, such as onscreen media information/ buffer % empty?

I've attached the logs from the pms server and ticked the box in the app to send logs to the server.


#10

@jjrjr1 Actually this is not true, PMP on my VIZIO 4k tv direct plays 4k content, it also direct plays on my iMac non 4k PMP. Plex needs to fix this issue, not all PMP’s direct play 4K, but some do. what gives ? in other forums people are saying this wasn’t an issue since upgrading PMS, this has nothing to do with the file, the server is not communicating properly with certain PMP’s.


#11

I can confirm 4K MKVs built by MakeMKV work flawlessly through Direct Play over wireless under the following conditions:

  1. Using the native Plex app on my Samsung TVs (one TV is from 2016 and one is from 2017).
  2. Subtitles are disabled
  3. Audio is set to 5.1 instead of TrueHD 7.1

As soon as I enable subtitles, I’m getting buffering. As soon as I enable TrueHD 7.1, I get buffering.

I also have a wired gigabit network throughout my house. However, my TVs work better over WIFI since their network adapters are only 100mbit.

I have PlexPy installed and can see the streams get transcoded as soon as I enable subtitles or the 7.1 audio channel. My Plex Server is a 2013 Mac Pro (the cylinder one) connected on gigabit.

I also have AppleTV 4Ks connected on wired gigabit and the Plex app on those devices continue to transcode. From what I’m told, it’s not Plex, but the AppleTV itself not being able to handle the 4K stream natively and it has to transcode. This results in buffering again. If I’ve been misled, please correct me.

This honestly sucks for 4K movies that require subtitles (like Assassin’s Creed). The only way I can watch those are through my 1080p MKVs since I can watch subtitles without buffering issues.


#12

@sharpie00 : 2016 and 2017 models are not using the app we are talking about here. (PlexForSamsung)
Models beyond 2015 use the official Plex TV app.
The forum for that is found here.


#13

@jjrjr1 said:
First of all any 4K in a MKV container will be transcoded by Plex.
Re-mux the file to mp4…

How to remux to mp4

Best Regard


#14

You can use a program that can do that for you, like Handbrake


#15

Thank

Best Regards