[REQUEST] Implement DDP Atmos encoding

[pcroland]

It's possible from DDP abd TrueHD aswell.

[pcroland]

No, with DRP and DEE.

[argonan0]

Well, the encoding only is possible from .atmos or .adm files, so...

What if the source is an Atmos stream?

[pcroland]

DRP and gstreamer can decode atmos, no need to use ADM.

[xEsteem]

+1 on this, for encoding ddp-joc from trueHD would be amazing to support

[jessielw]

@pcroland could you elaborate further what is needed to take THD and convert it to eac3 atmos? I might be able to assist.

[hyllm]

i really like to know that either.

[pcroland]

Atmos JOC is not possible from just a TrueHD source

[jessielw]

We actually found a way and developed it. We'll be open sourcing it in the next month or so.

[hyllm]

can i try? :) i am willing to pay for it. :) send pm if open for testing. :)

[jessielw]

Atmos JOC is not possible from just a TrueHD source

It is actually possible from the TrueHD source. If the source is untouched (had no dialnorm ran on it) it will decode to what ever preset of channels you'd like easily.

can i try? :) i am willing to pay for it. :) send pm if open for testing. :)

We actually have a stable version of it done. However, we're re-writing the tool and we'll open source it. Right now it's 1 large script and we're re writing it in OOP.

[pcroland]

Does it use DEE for encoding with a custom decoder or does the project have an encoder aswell?

[hyllm]

can't wait to test it. :) i got 5.1.2 atmos setup, so keeping large truehd with atmos is no benefit for me... 768kbps JOC will be great. :D can't wait to test. :)

[jessielw]

Does it use DEE for encoding with a custom decoder or does the project have an encoder aswell?

Uses a custom decoder but uses DEE to encode.

Actually we started the project based off of deew.

So totally open to working together.

[hyllm]

Atmos JOC is not possible from just a TrueHD source

LG C9 has no problem transcoding THD to EAC3 while preserving Atmos. And of course even now it is possible if you have both THD and EAC3 source by using EAC3 panning metadata and WAV layer from THD (by using Cavern's special secret option).

can you write more? :) i want to try. :)

[jessielw]

Atmos JOC is not possible from just a TrueHD source

LG C9 has no problem transcoding THD to EAC3 while preserving Atmos. And of course even now it is possible if you have both THD and EAC3 source by using EAC3 panning metadata and WAV layer from THD (by using Cavern's special secret

I'm decoding with dolbys reference player.

[jessielw]

We'll open source it soon. Works 100% of the time as long as THD has not been manipulated in anyway with dialnorm.

So straight from bluray it always works.

[pcroland]

Does it use DEE for encoding with a custom decoder or does the project have an encoder aswell?

Uses a custom decoder but uses DEE to encode.

Actually we started the project based off of deew.

So totally open to working together.

Could you write an e-mail or message me on Telegram?

[hyllm]

Atmos JOC is not possible from just a TrueHD source

LG C9 has no problem transcoding THD to EAC3 while preserving Atmos. And of course even now it is possible if you have both THD and EAC3 source by using EAC3 panning metadata and WAV layer from THD (by using Cavern's special secret option).

can you write more? :) i want to try. :)

Sure. EAC3 has 256 samples of silence in front so you need to add that to THD track decoded to WAV ADM, note that. Secret option is called --override-bed, I asked for it here: VoidXH/Cavern#78

whare to put the command line... what tool??? cavern64 itself is gui... or am i missing something? :)

[jessielw]

Cavernize GUI opens command line first, because it is compiled in Visual Studio using CLI option. Even if it has gui you can still use it as command line utility.

as long as THD has not been manipulated in anyway with dialnorm.

Does THD 4th actual (Atmos) substream uses Huffman too as EAC3 does? Did you stole the tables? Nuts, guys.

I don't understand what you're saying?

[hyllm]

Cavernize GUI opens command line first, because it is compiled in Visual Studio using CLI option. Even if it has gui you can still use it as command line utility. <

so merge first 256 EAC3 5.1 samples with truehd with atmos stream, then decode to adm wav??? can you write telegram/signal or PM here? i am kind of confused... but maybe i drunk too much last night. :D :D

[jessielw]

don't understand what you're saying?

Then how did you extract panning metadata to ADM with panning metadata? And how did you wrote the code that extracted all 16 objects from 8 channels? After that Cavern or even Davinci Resolve can be used to render it.

Dolby official libraries to decode the atmos data into what ever channel format is wanted.

[pcroland]

@jlw4049 e-mail or tg? 👀

[jessielw]

Anyone interested in it can reach me on discord.

jlw_4049#1867

[hyllm]

Anyone interested in it can reach me on discord.

jlw_4049#1867

sent you request

[jessielw]

official libraries to decode the atmos data into what ever channel format is wanted.

That is useless. Channel format is not needed by me or anyone, we need object format with panning metadata. That is closest to master format even if some of 128 objects are unified.

I guess this is useless decoded/encoded from a bluray thd track. Hmm

😀

[pcroland]

Also sent you a request on DC.

[hyllm]

or PM here

There is no PM on github. Those 256 samples are always silence, it is called encoder delay. Yes, you add 256 samples to the base layer, "bed", it will not allow you to proceed to ADM without that.

mail? discord? telegram?

[jessielw]

guess this is useless decoded/encoded from a bluray thd track. Hmm

That will not have any moving objects, it will be fake Atmos. Did you look with cavern driver (Unity), do the objects move after you encode EAC3?

Yes all the channels work after encoded.

[hyllm]

mail?

My mail is public on https://github.com/ValZapod

sent you mail

[jessielw]

We've also confirmed it on atmos equipment before/after encoding it. Identical sound, works great.

[pcroland]

Does the decoder just use a hidden option in DRP or some extra stuff aswell?

[jessielw]

Yes all the channels work after encoded.

That is not what I asked you and that is not useful, see these videos under the username that show moving objects: https://www.youtube.com/watch?v=7bEEnLqOXyA

I see those. But I'm not manipulating the data in anyway myself. Its with dolby libraries, decoding, encoding with DEE.

I can run my output file through a test if you'd like to provide what ever software that is to check it.

[jessielw]

But I'm not manipulating the data in anyway myself.

If you produce rendered file at any point, all panning metadata is gone, and it is FAKE atmos. Yes, there can still be more channels than 8 channels, and top channels will be there, sure, but Atmos will still be fake.

I can run my output file through a test if you'd like to provide what ever software that is to check it.

Please! 🤗

Let me know how to test like that video

[jessielw]

So I spent the a chunk of the night testing what you said. What I've noticed, is not ALL atmos tracks have panning metadata. However, the ones that do have that metadata, it is lost with my decode.

So, I do have a reliable way to decode/encode it. I do not have a reliable way to actually retain the panning metadata.

[Mamacito473]

So any idea on how to encode THD Atmos to DDP JOC Atmos ?

[lion9994]

Any progress jlw_4049?

[pcroland]

Someone else is working on it, no ETA, no need to ask when it will be ready, if it ever will be

[lion9994]

could you give me the link pleas

[pcroland]

What link?

[lion9994]

What's about DEEW with DDE isn't enough to encoding DD+ With atmos(EAC3-JOC) ?

[pcroland]

From a TrueHD file no.

[lion9994]

I find way if you're interest contact with me on discord

[hyllm]

I find way if you're interest contact with me on discord

and what about 7.1 EAC3 with JOC?

[pcroland]

Its probably another drp dump encoded with dee with no real metadata, no need to get hyped.

[lion9994]

Its probably another drp dump encoded with dee with no real metadata, no need to get hyped.

No, is there real metdata, but the volume will be reduce, i don't know what the specific issue till now.

[pcroland]

Stop spamming discord contacts, join the Telegram group

[LastBreeze]

Stop spamming discord contacts, join the Telegram group

Where's the link to the telegram group? Did a ctrl+f for "telegram" and "group" and read every individual message, I might be blind lol, thank you for your time and thank you for all of your work.

[pcroland]

You might be, It's at the top of the readme with a Telegram logo.

[pcroland]

And also at the bottom of the readme.