Weird extra audio track on Criterion Brazil BD

[sremick]

So tonight I ripped my blu-ray Criterion edition of Brazil (1985). In MakeMKV (1.15.2) when I open the disk pre-rip it it shows a DTS-MA track, a mono track (director commentary), and the subtitles track.

But then after ripping, opening the resulting MKV file in VLC shows two DTS-MA audio tracks (along with the mono commentary track and subtitles stream). In listening to them, I haven't been able to hear any apparent difference but I'm confused how the ripped file ended up with an additional (dupe?) audio track. Any thoughts?

[Woodstock]

By default, MakeMKV will extract the "core audio" from certain "lossless" tracks into a more-compatible "lossy" track. The metadata remains the same.

In other words, if you have a 7.1 DTS-MA HD track to start with, you'll also have a lossy 7.1 DTS track that more players can handle. TrueHD will have a standard AC3 track extracted.

[sremick]

By default, MakeMKV will extract the "core audio" from certain "lossless" tracks into a more-compatible "lossy" track. The metadata remains the same.

In other words, if you have a 7.1 DTS-MA HD track to start with, you'll also have a lossy 7.1 DTS track that more players can handle.

Ok, I'm with you so far. But is there any way to determine which is which? Both say (in VLC):

Codec: DTS Audio (dts)
Language: English
Type: Audio
Channels: Stereo
Sample rate: 48000 Hz
Bits per sample: 32

[dcoke22]

VLC doesn't seem to differentiate between DTS and DTS-MA. A tool like Mediainfo (https://en.wikipedia.org/wiki/MediaInfo) can tell the difference however.

[sremick]

VLC doesn't seem to differentiate between DTS and DTS-MA. A tool like Mediainfo (https://en.wikipedia.org/wiki/MediaInfo) can tell the difference however.

Perfect, that helped. Thank you! (it was the first audio track)

(GUI version of Mediainfo seems problematic... bummer. But commandline version worked fine)

Code: Select all

Audio #1
ID                                       : 2
ID in the original source medium         : 4352 (0x1100)
Format                                   : DTS XLL
Format/Info                              : Digital Theater Systems
Commercial name                          : DTS-HD Master Audio
Codec ID                                 : A_DTS
Duration                                 : 2 h 23 min
Bit rate mode                            : Variable
Bit rate                                 : 2 115 kb/s
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 kHz
Frame rate                               : 93.750 FPS (512 SPF)
Bit depth                                : 24 bits
Compression mode                         : Lossless
Stream size                              : 2.12 GiB (5%)
Title                                    : Stereo
Language                                 : English
Default                                  : Yes
Forced                                   : No
Original source medium                   : Blu-ray

Audio #2
ID                                       : 3
ID in the original source medium         : 4352 (0x1100)
Format                                   : DTS
Format/Info                              : Digital Theater Systems
Codec ID                                 : A_DTS
Duration                                 : 2 h 23 min
Bit rate mode                            : Constant
Bit rate                                 : 1 509 kb/s
Channel(s)                               : 2 channels
Channel layout                           : Lt Rt
Sampling rate                            : 48.0 kHz
Frame rate                               : 93.750 FPS (512 SPF)
Bit depth                                : 24 bits
Compression mode                         : Lossy
Stream size                              : 1.51 GiB (4%)
Title                                    : Stereo
Language                                 : English
Default                                  : No
Forced                                   : No
Original source medium                   : Blu-ray

[preserve]

And if you expand the title and the tracks in MakeMKV, you can deselect the lossy core before you rip if you don’t have a need for it.