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Weird extra audio track on Criterion Brazil BD
Posted: Thu Sep 03, 2020 2:14 am
by 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?
Re: Weird extra audio track on Criterion Brazil BD
Posted: Thu Sep 03, 2020 2:24 am
by 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.
Re: Weird extra audio track on Criterion Brazil BD
Posted: Thu Sep 03, 2020 2:28 am
by sremick
Woodstock wrote: ↑Thu Sep 03, 2020 2:24 am
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
Re: Weird extra audio track on Criterion Brazil BD
Posted: Thu Sep 03, 2020 2:37 pm
by 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.
Re: Weird extra audio track on Criterion Brazil BD
Posted: Fri Sep 04, 2020 5:25 am
by sremick
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
Re: Weird extra audio track on Criterion Brazil BD
Posted: Sun Sep 06, 2020 7:19 am
by 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.