[FFmpeg-user] Decode 360 reality audio (mpeg-h 3d) to ADM BWF format

[Joy Jin]

Hello,

Cavern <https://github.com/VoidXH/Cavern> is a tool that I can use to
decode eac3 to ADM BWF. Is there a tool that I can use to decode Sony’s 360
reality audio format (mpeg-h 3d) to ADM BWF? (Reason being, gain is set too
high so DRC / peak limiting is way too aggressive, and I have no option to
change that.) I’ve asked everywhere and it seems like the answer is no.
Below is a mediainfo on a sample file:

General

Complete name                            : /Users/jin/Desktop/Music/Stem
Separation/Tidal/YOASOBI - 360/ THE BOOK (360 Reality Audio) [203033692]
[2021]/06 - YOASOBI - 群青 (360 Reality Audio).mp4

Format                                   : MPEG-4

Format profile                           : Base Media / Version 2

Codec ID                                 : mp42 (mp42/isom)

File size                                : 19.8 MiB

Duration                                 : 4 min 8 s

Overall bit rate                         : 670 kb/s

Encoded date                             : UTC 2021-09-18 08:59:38

Tagged date                              : UTC 2021-09-18 08:59:38


Audio

ID                                       : 1

Format                                   : MPEG-H 3D Audio

Format profile                           : LC at L3

Codec ID                                 : mha1

Duration                                 : 4 min 8 s

Source duration                          : 4 min 8 s

Bit rate                                 : 666 kb/s

Channel(s)                               : 12 channels (7.1.4)

Channel layout                           : L R C LFE Lb Rb Lss Rss Tfl Tfr
Tbl Tbr

Sampling rate                            : 48.0 kHz

Frame rate                               : 46.875 FPS (1024 SPF)

Stream size                              : 19.7 MiB (99%)

Source stream size                       : 19.7 MiB (100%)

Encoded date                             : UTC 2021-09-18 08:59:38

Tagged date                              : UTC 2021-09-18 08:59:38

Signal group #1                          : 10 objects

 Type                                    : Object

 Number of objects                       : 10 objects

Codec configuration box                  : mhaC

Thank you,
Joy