H264 goes to transcoding - nvidia shield

Plex Media Server NAS & Devices
1

Hello
i have installed Plex server on windows10.
And client (player) is nVidia shield.

Following file always goes to transcoding mode if i try to play on shield. Also there is no audio in this file.
MKV contains only video file, and there is no audio or subtitle.

It is simple h264 file, yet it goes to trancoding. Other H264 and even H265 files plays well on same shield and from same server.
What is wrong with following file format?

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High 10@L4.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1 h 3 min
Bit rate : 11.2 Mb/s
Width : 1 920 pixels
Height : 1 080 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
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.225
Stream size : 4.96 GiB (100%)
Writing library : x264 core
Language : English
Default : Yes
Forced : No

2

Full description

Complete name : S02E12.without audio.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 4.96 GiB
Duration : 1 h 3 min
Overall bit rate : 11.2 Mb/s
Movie name : S02E12
Encoded date : UTC 2018-06-05 14:09:18
Writing application : mkvmerge v23.0.0 (‘The Bride Said No’) 64-bit
Writing library : libebml v1.3.6 + libmatroska v1.4.9
Attachments : CronosPro-Bold.ttf / CronosPro-Semibold.ttf / CronosPro-SemiboldIt.ttf / tahoma.ttf

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High 10@L4.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1 h 3 min
Bit rate : 11.2 Mb/s
Width : 1 920 pixels
Height : 1 080 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
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.225
Stream size : 4.96 GiB (100%)
Writing library : x264 core
Language : English
Default : Yes
Forced : No

3

I found the problem, apparently none of Nvidia’s graphic cards (current or previous) support 10-bit H.264 acceleration (only 10-bit HEVC). This is quite a shame, but not a fault of Plex. You can optimize your 10-bit H.264 content in Plex to avoid this, or only download 8-bit H.264 or 10-bit H.265 content in the future.

7l2qa8h3ap6s.png1162×501 15.2 KB

4

The problem I’m having is the the client hangs when it tries to play 10bit H264 rather than punting over to the trans-coder.

Folks claim this works fine on Kodi. But it may be doing software decode.