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

[Paul B Mahol]

On Wed, Jan 4, 2023 at 3:18 PM Joy Jin <jintanzhong at gmail.com> wrote:

> 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.
>

What is 'reality' in this context?


> 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
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