www.makemkv.com

"I downloaded this 2018 Blu-ray the usual way with MakeMKV. "

mdmarmd,

Is your "usual way" to write a backup of the whole disk? Does an actual *.MKV file leave the nasty stuff behind?

Google SCREEN PASS WIKILEAKS and see page 7 of Sony's PDF for a description of the "Screen Pass" DRM scheme. I ...

"I confirmed using the "info" button on my processor that the signal going from Oppo to my audio processor is DTS MA"

Sharok,

I completely missed that point.

Carl

"How can I check the MediaInfo?"

Sharok,

Google MEDIAINFO and look at the result MediaArea.net > MediaInfo. (It will probably be at the top of the list.)

"MediaInfo is a convenient unified display of the most relevant technical and tag data for video and audio files".

They offer it for about 10 ...

Sharok,

You said "some show up as DTS MA and some don't."

For simple DTS tracks, the program
MediaInfo (in text view) should report
Format: DTS
Format/Info: Digital Theater Systems
Codec ID: A_DTS

For Master Audio tracks,
MediaInfo should add
Format profile: MA / Core
or even
Format profile ...

"... some show up as DTS MA and some don't."

Sharok,

I think we've walked all the way back to Woodstock's suggestion: look at the files.

Choose one file that works as DTS MA and one that doesn't -- and examine each of them with MediaInfo. (Both audio and video metadata may be interesting. I ...

Sharok,

Master Audio works with physical disks and fails with MKV files. I assume you're playing MKV files over the network.

Does MA work when you play an MKV from a USB drive (to avoid the network) ?

Carl

"It is with MKV files that I see Oppo shows only DTS 5.1 /7.1 and not DTS MA. The interesting part is that this does not happen with all the ripped DTS MA movies."

Sharok,

Oh, sorry. I misunderstood. So (from an MKV file) the Oppo never identifies Master Audio when choosing a track, and never ...

Sharok,

"why does it omit MA?"

I believe the Oppo _reports_ only DTS even when it's actually _passing_ DTS-MA.

Today I ripped a blu-ray choosing
DTS-HD MA Surround 7.1 English and
DTS Surround 5.1 English

I played it on the Oppo, from a NAS via SMB. I chose (via the remote) the track
English ...