Direct play on some 4k HEVC files and transcodes some. Exact same codec

smart-tv

#1

Hi!

I get my LG and Samsung 4K TV to direct play some of my mkv files with 4K HEVC. For some reason 50% of the files doesn't direct play and Plex tries to transcode them.

On the ones not working it has DTS-HD audio so I changed it to AC3, so now my TVs direct play the audio but the video still tries to get transcoded.

Any ideas why?


#2

You need to give more info on the files that aren’t direct playing as well as the plex app version and plex server version


#3

Latest Plex version.
This file is working with direct stream both video and audio:
Format : Matroska
Format version : Version 4 / Version 2
File size : 51.5 GiB
Duration : 1h 43mn
Overall bit rate mode : Variable
Overall bit rate : 71.5 Mbps
Encoded date : UTC 2017-11-30 15:35:55
Writing application : mkvmerge v17.0.0 (‘Be Ur Friend’) 64-bit
Writing library : libebml v1.3.5 + libmatroska v1.4.8

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 1h 43mn
Bit rate : 65.9 Mbps
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) fps
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.331
Stream size : 47.4 GiB (92%)
Title : MPEG-H HEVC Video / 65896 kbps / 2160p / 23.976 fps / 16:9 / Main 10 Profile 5.1 High / 4:2:0 / 10 bits / HDR / BT.2020
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0000 cd/m2, max: 1000 cd/m2
Maximum Content Light Level : 814 cd/m2
Maximum Frame-Average Light Level : 192 cd/m2

Audio #1
ID : 2
Format : TrueHD
Format profile : TrueHD+Atmos / TrueHD
Codec ID : A_TRUEHD
Duration : 1h 43mn
Bit rate mode : Variable
Bit rate : 4 914 Kbps
Maximum bit rate : 7 719 Kbps
Channel(s) : Object Based / 8 channels
Channel positions : Object Based / Front: L C R, Side: L R, Back: L R, LFE
Sampling rate : / 48.0 KHz
Frame rate : 1 200.000 fps (40 SPF)
Compression mode : Lossless
Stream size : 3.54 GiB (7%)
Title : Dolby Atmos/TrueHD Audio / 7.1-Atmos / 48 kHz / 5554 kbps / 24-bit
Language : English
Default : Yes
Forced : No

This file Plex tries to transcode both video and audio.

Format : Matroska
Format version : Version 4 / Version 2
File size : 45.2 GiB
Duration : 1h 46mn
Overall bit rate : 60.6 Mbps
Encoded date : UTC 2018-03-11 16:39:46
Writing application : mkvmerge v21.0.0 (‘Tardigrades Will Inherit The Earth’) 64-bit
Writing library : libebml v1.3.5 + libmatroska v1.4.8

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 1h 46mn
Bit rate : 58.2 Mbps
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) fps
Color space : YUV
Chroma subsampling : 4:2:0 (Type 2)
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.293
Stream size : 43.4 GiB (96%)
Title : English
Language : English
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : Display P3
Mastering display luminance : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level : 323 cd/m2
Maximum Frame-Average Light Level : 144 cd/m2

Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Format profile : MA / Core
Codec ID : A_DTS
Duration : 1h 46mn
Bit rate mode : Variable / Constant
Bit rate : 2 411 Kbps / 1 509 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Frame rate : 93.750 fps (512 SPF)
Bit depth : 16 bits
Compression mode : Lossless / Lossy
Stream size : 1.80 GiB (4%)
Title : English
Language : English
Default : Yes
Forced : No


#4

No subtitles enabled I’m assuming? If so disable them and try again, if not try this.

Try playing the second file through Plex DLNA. First you’ll have to delete the preset profile used for Samsung bc it is not updated for HEVC. By deleting the profile plex will default to a universal profile which is compatible

You will most likely find profiles located under

C:\Program Files (x86)\Plex\Plex Media Server\Resources\Profiles

Then find the file name Samsung SmartTV.xml and delete it. It will ask for administration clearance just accept it.

Now try to play the file. If it plays without transcoding then it’s the Plex app that is limited( They have alot of work to do for 4k compatability)