E-AC3+Atmos

[Atlantis]

Is it possible to convert/encode TrueHD+Atmos to E-AC-3+Atmos?

[tebasuna51]

Exist E-AC-3+Atmos?

At least with free tools is not possible.

[Atlantis]

Yes. This is the official Dolby site with official demo files. Download them:
https://www.dolby.com/us/en/guide/test-tones.html

Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced Audio Coding 3
Format profile : E-AC-3+Atmos / E-AC-3
Format settings, Endianness : Big
Codec ID : ec-3
Duration : 1 min 8 s
Bit rate mode : Constant
Bit rate : 384 kb/s
Channel(s) : 11 objects / 6 channels
Channel positions : 11 objects / Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 187.500 FPS (256 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 3.14 MiB (3%)
Service kind : Complete Main
Encoded date : UTC 2014-10-26 00:52:09
Tagged date : UTC 2014-10-26 00:52:09

[tebasuna51]

Good to know.

Downloaded the samples in link and checked with MediaInfo:

5_1_2 and 5_1_4 are showed by MediaInfo like:

Channel(s) : 15 objects / 6 channels
Channel positions : 15 objects / Front: L C R, Side: L R, LFE

7_1_2, 7_1_4 and 9_1_6 like:

Channel(s) : 11 objects / 6 channels
Channel positions : 11 objects / Front: L C R, Side: L R, LFE

All streams are decoded by ffmpeg (and eac3to) like standard 5.1 without mention about Atmos content or any warning.

If free tools can't recognize/decode properly seems than are far of encode.

[Midzuki]

Only Dolby Media Encoder is capable of encoding to DD+ containing Atmos metadata. Also, the software runs only on Mac operating systems.