Demuxed LPCM 3.0 (Perspecta) is messed up
Posted: Tue Apr 25, 2023 1:13 am
Here's a fun one for you:
https://www.blu-ray.com/movies/Yojimbo- ... ay/332600/
https://www.amazon.co.jp/Yojimbo-4K-Blu ... B0BV122JDJ
In spite of what Blu-ray.com says, this disc has the 3.0 "Perspecta" audio track in LPCM (not Dolby Digital).
The stereo (dual mono) LPCM track demuxes flawlessly, but the 3.0 track comes out messed up. The file size is precisely double that of the 2.0-channel track, instead of 150%, and the sound is garbled like mad. In a spectrogram it looks absolutely crazy.
Demuxing the same track to .W64 in eac3to v3.3.4 succeeds properly, yielding a 3-channel file of the appropriate size that looks good in spectrograms and sounds fine on playback.
Here's MediaInfo from the DGDemux-ed track:
And here's the same track from eac3to:
https://www.blu-ray.com/movies/Yojimbo- ... ay/332600/
https://www.amazon.co.jp/Yojimbo-4K-Blu ... B0BV122JDJ
In spite of what Blu-ray.com says, this disc has the 3.0 "Perspecta" audio track in LPCM (not Dolby Digital).
The stereo (dual mono) LPCM track demuxes flawlessly, but the 3.0 track comes out messed up. The file size is precisely double that of the 2.0-channel track, instead of 150%, and the sound is garbled like mad. In a spectrogram it looks absolutely crazy.
Demuxing the same track to .W64 in eac3to v3.3.4 succeeds properly, yielding a 3-channel file of the appropriate size that looks good in spectrograms and sounds fine on playback.
Here's MediaInfo from the DGDemux-ed track:
Code: Select all
General
Complete name : E:\Yojimbo_UHD PID 1101 jpn DELAY 0ms.w64
Format : Wave64
File size : 3.56 GiB
Duration : 2 h 27 min
Overall bit rate mode : Constant
Overall bit rate : 3 456 kb/s
Audio
Format : PCM
Format settings : Little / Signed
Codec ID : 1
Duration : 2 h 27 min
Bit rate mode : Constant
Bit rate : 3 456 kb/s
Channel(s) : 3 channels
Sampling rate : 48.0 kHz
Bit depth : 24 bits
Stream size : 3.56 GiB (100%)
ReportBy : MediaInfoLib - v22.12
Code: Select all
General
Complete name : E:\Y30_eac3to.w64
Format : Wave64
File size : 2.67 GiB
Duration : 1 h 50 min
Overall bit rate mode : Constant
Overall bit rate : 3 456 kb/s
Audio
Format : PCM
Format settings : Little / Signed
Codec ID : 00000001-0000-0010-8000-00AA00389B71
Duration : 1 h 50 min
Bit rate mode : Constant
Bit rate : 3 456 kb/s
Channel(s) : 3 channels
Channel layout : L R C
Sampling rate : 48.0 kHz
Bit depth : 24 bits
Stream size : 2.67 GiB (100%)
ReportBy : MediaInfoLib - v22.12