Looking for a eac3 7.1 encoder

sfatula · 10th January 2020, 19:21

I don't think eac3to does this, libav doesn't seem to support it, ffmpeg does not, etc. However, I have discovered that Plex does use ffmpeg via a special external library they seem to create on the fly to transocde to eac3. I can't find eac3_eae reference anywhere but Plex, and of course no source code. I wonder where they got it?

Anyone know of a library anywhere I could use to encode to eac3 7.1?

eca2424 · 2nd April 2020, 21:25

Any news?

tebasuna51 · 2nd April 2020, 23:26

7.1 for what? Maybe Atmos...

hajj_3 · 3rd April 2020, 11:19

Anyone know when patents for E-AC3 aka Dolby Digital Plus expire? I can't find anything on google, just info about regular dolby ac3. Also, I can't even find a date for when E-AC3 was even released so i can't even add 20yrs to that for a rough estimate.

3rd April 2020, 15:09

Quote:

Originally Posted by hajj_3

Anyone know when patents for E-AC3 aka Dolby Digital Plus expire? I can't find anything on google, just info about regular dolby ac3. Also, I can't even find a date for when E-AC3 was even released so i can't even add 20yrs to that for a rough estimate.

If it helps, the A/52B revision of the ATSC standard that contained the eac-3 specification was published in June of 2005.

eca2424 · 5th April 2020, 20:36

These guys encoding 7.1 eac3. How?

[DELETED by rule 6]

Sparktank · 6th April 2020, 00:18

Quote:

Originally Posted by eca2424

These guys encoding 7.1 eac3. How?

Rule 6 violation. We don't discuss pirated stuff here.

l00t · 6th April 2020, 08:05

The only way to do it, is to use Dolby's Media Producer Suite. It costs about $3000 grand and available for Windows and OSX.

https://www.dolby.com/us/en/professi...cer-suite.html

hajj_3 · 18th April 2020, 10:46

I think this might be the list of patents for Dolby E-AC3/Dolby Digital Plus: TS 102 366 https://www.docdroid.net/xEqhKmr/initdecl-pdf

The last U.S patent seems to be US6246345 which seems to have expired on 2019-07-08.

filler56789 · 18th April 2020, 13:08

Quote:

Originally Posted by l00t

The only way to do it, is to use Dolby's Media Producer Suite. It costs about $3000 grand and available for Windows and OSX.

https://www.dolby.com/us/en/professi...cer-suite.html

Not the only way, apparently...

The MainConcept Dolby Digital Plus Pro SDK components support both Dolby Digital (AC-3) as well as Dolby Digital Plus (EAC-3) audio for encoding and decoding.

Encoding and decoding for different channel layouts ranging from mono, stereo, 5.1 up to 7.1 for the perfect Dolby audio experience.

https://www.mainconcept.com/eu/produ...ital-plus.html

SeeMoreDigital · 18th April 2020, 15:34

And here's a link to the 'MainConcept Dolby Digital Plus Pro SDK Data Sheet' Data sheet: https://www.mainconcept.com/fileadmi..._DATASHEET.pdf

neil wilkes · 24th April 2020, 15:36

Quote:

Originally Posted by l00t

The only way to do it, is to use Dolby's Media Producer Suite. It costs about $3000 grand and available for Windows and OSX.

https://www.dolby.com/us/en/professi...cer-suite.html

Sorry to correct you, but this is Mac only.
Just like the new DTS-X encoder.
From the quoted Dolby web page:

Quote:

Dolby Media Producer Suite v.2 Hardware Requirements
Mac® Pro 5,1 or later (6,1 preferred)
Intel Xeon, Intel Core i7 or Intel Core i5 with full support of the SSE4.2 instruction set (Nehalem/Westemere and later microarchitectures)
Mac OS X® version 10.10, 10.11 or 10.12
8 GB RAM (16 GB recommended for Dolby TrueHD encoding jobs with Dolby Atmos)
PACE iLok USB smart key
For more information about iLok USB smart keys, please visit www.iLok.com.

This of course is nothing less than bloody perverse given there are NO full spec mac OS Blu-ray authoring tools in existence that can be used to create factory replicas, and far too many consoles in common use will not play or even load BD-R.
All you have these days is Scenarist BD, and that is strictly Windows 64-bit only. Sony bought up NetBlender, and promptly killed it off and it appears that their Blu-Print has gone the same way. Scenarist is the best (indeed the only) player in town still actively developing and supporting their software.

Question - why on earth would you want to even bother with 7.1 AC3? Much better to use DTS-HD Master Audio.

SeeMoreDigital · 24th April 2020, 16:27

Quote:

Originally Posted by neil wilkes

Question - why on earth would you want to even bother with 7.1 AC3? Much better to use DTS-HD Master Audio.

What's so bad about having a lossy audio format that's able to support 7.1 channels (not to mention Atmos)?

By-the-way.... MainConcept's Dolby Digital Plus Pro encoder runs with Windows, Mac and Linux

SquallMX · 26th April 2020, 22:18

Adobe Audition 2018 and below includes support for EAC3 encoding up to 7.1 1024 Kbps, but is not Blu-ray compatible.

SeeMoreDigital · 6th May 2020, 11:05

As most of us have quite a bit of time on our hands at the moment, a couple of days ago I decided to find out what a 5.1 Dolby Digital Plus audio encode of Blade Runner 2049 would sound like.

Audio source: 7.1 [8-channel] Dolby TrueHD with Atmos stream
Encoding software: UsEac3To 'A/V Recode' option using ffmpeg manually set to 'E1536' (Kbps)
Muxer: MKVToolNixGUI
Playback device: OPPO UDP-203

My audio surround system is essentially for listening to music (I don't have an Atmos). All my speakers offer full frequency range, so they're all able to produce bass!

Anyway... I can confirm that the 5.1 Dolby Digital Plus encodes sounds extremely good, there's plenty of bass and dynamic range. Indeed, there's very little difference between the 7.1 TrueHD source.

Now I'm wondering what a 7.1 Dolby Digital Plus encode from the same source would sound like!

NiN3 · 22nd September 2020, 15:02

Quote:

Originally Posted by SquallMX

Adobe Audition 2018 and below includes support for EAC3 encoding up to 7.1 1024 Kbps, but is not Blu-ray compatible.

What's the difference between Bluray compatible or not? Both have legacy 5.1 stream inside as far as I am concerned.

nevcairiel · 22nd September 2020, 15:34

Quote:

Originally Posted by NiN3

What's the difference between Bluray compatible or not? Both have legacy 5.1 stream inside as far as I am concerned.

Blu-ray EAC3 7.1 is literally 5.1 AC3 + 4 channel EAC3 which replaces the side channel and adds rear channel.

Streaming EAC3 7.1 from eg. Netflix is pure 7.1 EAC3, no weird composition, no AC3 legacy stream on the inside.

NiN3 · 22nd September 2020, 15:59

Quote:

Originally Posted by nevcairiel

Blu-ray EAC3 7.1 is literally 5.1 AC3 + 4 channel EAC3 which replaces the side channel and adds rear channel.

Streaming EAC3 7.1 from eg. Netflix is pure 7.1 EAC3, no weird composition, no AC3 legacy stream on the inside.

I see, thanks.

What happens when you play a EAC3 track on a system that only supports AC3? According to wikipedia and some explanations on Dolby's website, EAC3 is backwards compatible so it supposedly converts it bit perfectly to AC3.

SeeMoreDigital · 22nd September 2020, 21:53

Quote:

Originally Posted by NiN3

I see, thanks.

What happens when you play a EAC3 track on a system that only supports AC3?

Well... If the EAC3 audio stream contains an AC3 core, the playback device should, in theory, be able to play the AC3 core...

NiN3 · 22nd September 2020, 22:15

Quote:

Originally Posted by SeeMoreDigital

Well... If the EAC3 audio stream contains an AC3 core, the playback device should, in theory, be able to play the AC3 core...

nevcairiel said the EAC3 track does not include a AC3 core inside it unless you use the Blu-ray Disc profile, in which case it's mandatory.

10th January 2020, 19:21	#1 \| Link
sfatula Registered User Join Date: Apr 2008 Posts: 30	Looking for a eac3 7.1 encoder I don't think eac3to does this, libav doesn't seem to support it, ffmpeg does not, etc. However, I have discovered that Plex does use ffmpeg via a special external library they seem to create on the fly to transocde to eac3. I can't find eac3_eae reference anywhere but Plex, and of course no source code. I wonder where they got it? Anyone know of a library anywhere I could use to encode to eac3 7.1?

2nd April 2020, 23:26	#3 \| Link
tebasuna51 Moderator Join Date: Feb 2005 Location: Spain Posts: 7,058	7.1 for what? Maybe Atmos... __________________ BeHappy, AviSynth audio transcoder.

3rd April 2020, 11:19	#4 \| Link
hajj_3 Registered User Join Date: Mar 2004 Posts: 1,142	Anyone know when patents for E-AC3 aka Dolby Digital Plus expire? I can't find anything on google, just info about regular dolby ac3. Also, I can't even find a date for when E-AC3 was even released so i can't even add 20yrs to that for a rough estimate. Last edited by hajj_3; 3rd April 2020 at 11:30.

5th April 2020, 20:36	#6 \| Link
eca2424 Registered User Join Date: Nov 2015 Posts: 3	These guys encoding 7.1 eac3. How? [DELETED by rule 6] Last edited by tebasuna51; 6th April 2020 at 17:06. Reason: rule 6

18th April 2020, 10:46	#9 \| Link
hajj_3 Registered User Join Date: Mar 2004 Posts: 1,142	I think this might be the list of patents for Dolby E-AC3/Dolby Digital Plus: TS 102 366 https://www.docdroid.net/xEqhKmr/initdecl-pdf The last U.S patent seems to be US6246345 which seems to have expired on 2019-07-08. Last edited by hajj_3; 18th April 2020 at 10:57.

2nd April 2020, 21:25	#2 \| Link
eca2424 Registered User Join Date: Nov 2015 Posts: 3	Any news?

6th April 2020, 08:05	#8 \| Link
l00t Where's my loot? Join Date: May 2019 Posts: 63	The only way to do it, is to use Dolby's Media Producer Suite. It costs about $3000 grand and available for Windows and OSX. https://www.dolby.com/us/en/professi...cer-suite.html

18th April 2020, 15:34	#11 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,244	And here's a link to the 'MainConcept Dolby Digital Plus Pro SDK Data Sheet' Data sheet: https://www.mainconcept.com/fileadmi..._DATASHEET.pdf __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|

26th April 2020, 22:18	#14 \| Link
SquallMX Special SeeD Join Date: Nov 2002 Location: Mexico Posts: 340	Adobe Audition 2018 and below includes support for EAC3 encoding up to 7.1 1024 Kbps, but is not Blu-ray compatible.

6th May 2020, 11:05	#15 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,244	As most of us have quite a bit of time on our hands at the moment, a couple of days ago I decided to find out what a 5.1 Dolby Digital Plus audio encode of Blade Runner 2049 would sound like. Audio source: 7.1 [8-channel] Dolby TrueHD with Atmos stream Encoding software: UsEac3To 'A/V Recode' option using ffmpeg manually set to 'E1536' (Kbps) Muxer: MKVToolNixGUI Playback device: OPPO UDP-203 My audio surround system is essentially for listening to music (I don't have an Atmos). All my speakers offer full frequency range, so they're all able to produce bass! Anyway... I can confirm that the 5.1 Dolby Digital Plus encodes sounds extremely good, there's plenty of bass and dynamic range. Indeed, there's very little difference between the 7.1 TrueHD source. Now I'm wondering what a 7.1 Dolby Digital Plus encode from the same source would sound like! __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode