Nvidia Shield Dolby TrueHD playback is borked

Plex Players Streaming Devices
634

seems to be fixed in stable release? I had an update today and everything is working

1 Like
635

As stated, the seamless branching issue is not what this thread was originally about nor does it appear to have been addressed.

636

I have an NVIDIA shield and Plex server on a PC and an ATMOS capable system. I play ATMOS successfully most of the time but several movies end up being in D+ instead of ATMOS. I think I have everything up to date and I know Iā€™m using proper ATMOS movies (in this case The Batman DDP5.1). Can anyone help?

637

Have you checked the server during playback to see if audio transcoding is happening?

638

Itā€™s also possibile there are versions out there with both the Atmos DD+ and non-Atmos DD+ track.

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639

As I understand it, Atmos data (ie. height channels) can be presented in either TrueHD (lossless) or Dolby Digital+ (lossy) streams. The latter is typically present on streaming services with the higher bitrate TrueHD reserved for physical media. Some AV equipment will distinguish between the two while others will not. My Samsung soundbar, for instance, simply reports ā€œDolby Atmosā€ for TrueHD or Dolby Digital+ streams, with Atmos data.

But thatā€™s not to say that Dolby Digital+ and TrueHD always have Atmos, they donā€™t, theyā€™re just streams that are capable of carrying the additional Atmos data.

640

Agreed. Using Nvidia SHIELD Pro 2019 and TrueHD now works fine without almost any buffering even when switching Chapters, and even on Wifi connection with large HEVC files. For reference, SHIELD is direct playing and passing TrueHD 7.1 to my Denon AVR-S650H (2019). Letā€™s celebrate when the devs fix something! Thank you kindly. :slight_smile:

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641

Stupid question maybe but what do I look for? My server is in a separate room so Iā€™ve never looked at it while a movie is playing in the home theatre.

642

This is certainly an atmos track, which is why Iā€™m curious whatā€™s going on.

643

Team of Plex Users,
I can report that I have played DTS-X and Dolby Atmos from the NVIDIA SHIELD PRO.

The content does work. Update to the 9.1 which has a new demuxer. Perhaps this was the problem the whole time.

Any ongoing issues must be the file.

If your movie has subtitles, turn the subtitles OFF in your settings and try again.

I thought DTS-X would not work, but it did when I did and also with Dolby Atmos (TrueHD w/Atmos).

Thank you.

1 Like
644

Log into your server from a web browser and check the Activity tab during playback. Where the file playing is listed you can expand the details to see whether audio and video are being direct played or transcoded.

645

I was sure it was going to be transcoding but it actually says ā€œEnglish (EAC3 5.1)
Direct Playā€ and my receiver is reading it as D+ only.

646

EAC3 == Dolby Digital+.

647

Yes but it also has ATMOS and Iā€™m not getting it.

648

I think you had better start a separate thread as it would seems as though your issue is not related to the bugs that have been reported in this thread.

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649

I canā€™t believe Iā€™m saying this, but Iā€™m now back to the good old 8.29.0.30300 beta. After a half dozen playback tests with different resolution movies and audio formats, I had multiple crashes during playback and seeking. No longer having those with the old reliable beta. My Plex client as always is set to passthrough audio, match resolution and frame rate. This is on a 2019 Shield Pro w/ Dolby Vision enabled.

650

there should be no need to have ā€œmatch resolutionā€ turned one, as the shields AI upscaling will be upscaling the content to 4k before it reaches the TV anyway.

651

Iā€™m still on the ā€œrolled backā€ 8.29.1 because I havenā€™t exactly seen a flood of posts stating that the public 9.1.0 is good.

Soā€¦ Is it good ??

1 Like
652

Is your plex working perfectly as expected on the roll back? Mine is. I see no reason to risk breaking it for a slew of bloatware and ā€œfeaturesā€ nobody asked for. My personal opinion.

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653

Beta version 9.1 and the current 9.2 are working perfectly for me from the point of view of the original bug that I reported. Iā€™m not seeing issues with fast forwarding or rewinding either.

I canā€™t comment on the seamless branching issue but that is really outside the scope of this thread.

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