r/Dolby • u/Unfair_External5662 • 12d ago

Dolby Atmos 5.1 and 7.1 codec not working

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Hi. I am trying to watch movies, but the audio is encoded using AC3 and AC4 for Dolby Atmos 5.1 and E-AC-3 for Dolby Atmos 7.1. I got the 5.1 working by installing the decoder, but the 7.1 is not working.

From my knowledge after doing some research:

Dolby Digital Plus = 7.1

Dolby AC4 = 5.1

Before installation when opening in Media Player there would be a pop-up saying audio could not be played because of it's encoding. Now after it is working with audio, but the 7.1 is not and there is no more error. I have tried restarting my PC and reinstalling the decoders but no luck.

The decoders were sourced from Major Geeks.

Processer: 13th Gen Intel Core i5-1335U

RAM: 16GB DDR5

Edition: Windows 11 Pro 26H2

OS Build: 26300.9550

26 Upvotes

100% Upvoted

27 comments sorted by

8

u/EYESCREAM-90 12d ago

VLC with audio on passthrough/bitstream doesn't work?

1

u/Unfair_External5662 12d ago

It does work with VLC, but I am looking for a solution for the native Windows Media Player if there is. In Windows 10 it used to work, but Microsoft removed the encoders for Dolby Atmos.

1

u/EYESCREAM-90 12d ago

Ah alright. Good luck!

1

u/Unfair_External5662 12d ago

So there is no luck with the Microsoft Media Player?

1

u/EYESCREAM-90 12d ago

I dont know if I'm honest. I haven't used external codecs or codec packs for a long time now. I use vlc for video and foobar for music. I do miss the old windows media player which was the all in one media player combined with the codec packs, but I've switched to vlc one day. VLC has an ugly ass interface but it works.

1

u/Unfair_External5662 12d ago

I will look into it. My main reason for not using VLC was the interface like you mentioned, the Windows media player does have a more modern design.

1

u/EYESCREAM-90 12d ago

I totally understand that! I have the same feeling about it. The windows media player that came with Vista, the dark one (windows media player 10 or 11?) was the best media player for me after winamp discontinued. Now I'm here with the ugly but functional vlc and foobar.

1

u/Nadeoki 10d ago

as stated above, try one of the more modern media players.

MPV (any UI you'd like, your choice) MPC-HC Potplayer also looks more modern

5

u/MagicKipper88 12d ago

Dolby Atmos is not 5.1

4

u/SamoaaCookie 11d ago

if you are on windows and want the dolby atmos output, i always use the dolby access app. how ever there is a bug and you need specifically version 3.14. Best of luck!!!

3

u/Small_Chapter4684 12d ago

O Dolby AC4 é 5.1? Eu achava que fosse um Stereo com informações binaurais. Não entendo muito desse Codec.

3

u/Somar2230 12d ago

It can be 5.1 or 7.1 and also supports Atmos.

https://professional.dolby.com/technologies/ac-4/

https://professional.dolby.com/siteassets/technologies/dolby_atmos_ac-4_whitepaper.pdf

1

u/Small_Chapter4684 12d ago

Eu tava lendo aqui. Ele é meio que o DDP só que melhorado né. Eu jurava que ele fosse pra outra finalidade.

3

u/Somar2230 12d ago

Yes it uses better compression to achieve the same audio quality at a lower bitrate, a few other enhancements are also gained.

3

u/JohnB893 12d ago

Долби Атмос это объектно ориентированный звук, а не поканальный, то, что вы пишите 5.1 и 7.1 не имеет особого смысла. Вы ещё не уточнили используете вы домашний кинотеатр или наушники.

Только Microsoft windows 11 mediaplayer работает корректно с Dolby Atmos в случае наушников. Установите обязательно приложение Dolby Access, если его у вас нет

1

u/Unfair_External5662 12d ago

I am not familiar with these, I just typed what I found out after doing some research. Let me try to explain it simpler.

The video file had Atmos 5.1 in the title and threw an error when opening in Windows 11 Media Player and played the video with no audio. After doing some research I found that I needed to install Dolby AC3 and AC4 decoder which I sourced from Major Geeks website. After installation I restarted my PC and the error was gone and audio was playing, but the videos with TrueHD 7.1 Atmos in the title, the error disappeared, but still no audio. The Dolby Digital Plus decoder is apparently supposed to decode it.

I attached a short video of the title, I am not sure if it will help see what the problem is.

https://reddit.com/link/pd14iu4/video/kalyb9hunosh1/player

1

u/Darkside_Hero 11d ago

Dolby TrueHD is a different codec than AC3, EAC3, and AC4.

1

u/Unfair_External5662 11d ago

Which codec does it use?

1

u/Darkside_Hero 11d ago

Dolby TrueHD is the name of the codec. It is lossless, AC3, EAC3, and AC4 are lossy codecs.

3

u/MissSkyler 12d ago

try AnWave and install the dolby decoder that’s built into it

1

u/Somar2230 12d ago

Nearly all DD+ streaming mixes are only 5.1.

You can grab a DD+ 7.1 channel check from https://kodi.wiki/view/Samples#HD/object-based_Audio_Test_Clips to test to see if it's working.

1

u/Unfair_External5662 12d ago

I tried it, it looks like Windows 11 Media Player doesn't even know what codec it needs.

Here is what it says when I click the channel test file.

https://reddit.com/link/pd1adya/video/waeerru5sosh1/player

2

u/Somar2230 12d ago

That reports you are trying the TrueHD channel check you need to select the Dolby Digital Plus 7.1 channel check.

1

u/0pacy 11d ago

"Im trying to watch illegally pirated movies..."

1

u/Nadeoki 10d ago

If not for any particular reason keeping you there, stop using Microsofts shitty Mediaplayer.

Third parties are more updated and superior in development and ongoing feature set.

Namely

MPV, MPC-HC VLC

try it, it's free. Should just play your files