Cant enable hardware accelerating

Plex Media Server NAS & Devices
1

Server Version#: DSM 6.2.2
Player Version#: PlexMediaServer-1.18.6.2368-97add474d-x86_64.spk

When I try to watch a 4K movie it does not run. When I look at the logs I see this:

Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: Selected protocol dash; container: mp4
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: analyzing media item 2278
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: Glass (2019): Direct Play is disabled
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: Glass (2019): media must be transcoded in order to use the dash protocol
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: Glass (2019): no direct play video profile exists for http/mkv/hevc
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: Glass (2019): no direct play video profile exists for http/mkv/hevc/truehd
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: Glass (2019): no direct play video profile exists for http/mkv/hevc/ac3
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - Glass - video.bitDepth limitation applies: 10 > 8
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - Glass - audio.channels limitation applies: 8 > 6
Feb 08, 2020 13:00:04.699 [0x7f377351d0] DEBUG - MDE: Glass (2019): no remuxable profile found, so video stream will be transcoded
Feb 08, 2020 13:00:04.700 [0x7f377351d0] DEBUG - MDE: Cannot direct stream video stream due to profile or setting limitations
Feb 08, 2020 13:00:04.700 [0x7f377351d0] DEBUG - Scaled up video bitrate to 295659Kbps based on 4.500000x fudge factor.
Feb 08, 2020 13:00:04.700 [0x7f377351d0] DEBUG - Scaled maximum bitrate for resolution reduction to 103845Kbps.
Feb 08, 2020 13:00:04.700 [0x7f377351d0] DEBUG - Glass - audio.channels limitation applies: 8 > 6
Feb 08, 2020 13:00:04.700 [0x7f377351d0] DEBUG - MDE: Cannot direct stream audio stream due to profile or setting limitations

I can’t find out why this happens but I’m sure that if I enable hardware accelerated transcoding it will help. I installed the 64bit latest version of Plex like said and my DS218 Play supports hardware transcoding. Why don’t I see the option in Settings > Transcoder? How do I enable this and how do I solve this problem?

2

The 218Play has a custom video chip not supported by Plex.

3

Is there another alternative to let my NAS handle transcoding and still use Plex?

My Plex does not play the 4k movies at all and from what I understand in the logs its the transcoding. Can I solve this problem in some way?

4

Trans coding 4K is not ideal at the best of times, with a NAS definitely unless it has a suitable processor.

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I dont want to transcode it if possible. The server is also on the same network of my streaming device.

6

Yes, but 4K files often have audio formats that your TV can not handle. TRy using alternative audio tracks from a Title. Example: AC3, Eac3, non of those HD-MA 10 bit 7.1 channel files

7

I tried with AC3 but that doesn’t work either. Also in Quality I can’t select Original. All options are "Convert,… " and the default is Max.

8

What device are you streaming to?

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I tried on my high end PC and also on my TV but both give same results.

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Browsers are limited with audio on what ever OS or hardware config. TV model Please?

11

LG 70UH700V-ZA with WebOs 3.3.0

And the PC is Windows 10 running in Chrome

But the weirdest thing is that even videos that used to play in 4k now don’t play anymore

12

You have checked you LG Plex app settings

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Which settings?

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Your avatar Home page

15

PC browsers do not support HEVC video. See Can I use... Support tables for HTML5, CSS3, etc.

On a PC, use Plex for Windows or Plex Media Player.

1 Like
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What version of the Plex LG app is on your TV? It should be listed in the app settings.

For audio, choose either AC3 or dts audio tracks. No TrueHD, dts-HD MA, or 7.1 audio of any type.

Make sure you have subtitles disabled. They can cause a video transcode (see below).

Check the settings in the Plex LG app. Make sure both Direct Play and Direct Stream are enabled. Also, set any bandwidth limits to Original/Maximum.

Regarding subtitles & Plex SmartTV apps: Enabling PGS or VOBSUB subtitles forces a video transcode. If the audio is transcoding, enabling SRT subtitles also forces a video transcode.

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I’ve let it load for a while and it started to play. Even with TrueHD audio but it just takes longer. I assumed if my PC can’t handle it for that reason it must be the same for the TV too but I didn’t consider that I am running it in the browser. Thanks for all the help guys now all thats left is the slow loading but I don’t think there is anything to do about that.

I just wonder one more thing. After I start the video once, I don’t have to load it the second time. How does this work? Does it cache that on the TV or put that version on the server? I want to know because maybe then I can pre-load a couple movies and watch them later.

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Default action for Plex is to stream/transcode videos in real-time (or as fast as the server permits). They are not queued/stored/etc on either the server or client.

Plex does have an option for Optimized Versions. This will transcode the movie in the background and store it on your server. See Media Optimizer Overview for additional information.

You should not use Optimized Versions for HDR media. Transcoding HDR media in Plex destroys the HDR information. Also, Plex does not perform HDR to SDR tone mapping, so the colors will appear washed out.

Some Plex clients - mobile & Plex for Windows & Mac - have the ability to download the media for local, offline playback. This is not supported on SmartTV nor streaming box (Firestick, etc) devices.

1 Like
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