how to get flac from blu-ray hdmi audio...

[beaker152]

I'm in pursuit of a bit-perfect recording of the audio from the hdmi output from my blu-ray player...
can anyone recommend a lossless path?
i'm guessing something like blu-ray hdmi out->(some splitter/extractor)->usb input to audacity flac recording?

 

[staticV3]

I'm in pursuit of a bit-perfect recording of the audio from the hdmi output from my blu-ray player...
can anyone recommend a lossless path?
i'm guessing something like blu-ray hdmi out->(some splitter/extractor)->usb input to audacity flac recording?

I think the most straightforward way, and the way that would guarantee that no bits are lost, would be to simply rip the Blu-Ray onto your PC using a BD Reader.

You'll then find the content in the disk's file structure in an m2ts container, from where you can extract the raw audio using MKVToolnix and MKVCleaver.

 

[beaker152]

thanks, i'll try it!

 

[beaker152]

So I got a BD reader, and ripped the files to my drive. The disc comes with a Dolby Atmos remix done in 2023 and an original soundtrack done in 1984. When I open one of the m2ts files in MKVToolNix, i see 5 audio tracks as shown in the attached. The Atmos track is obvious--is there a straightforward way to explicitly determine what the AC-3 tracks are?

 

[staticV3]

i see 5 audio tracks as shown in the attached. The Atmos track is obvious--is there a straightforward way to explicitly determine what the AC-3 tracks are?

Two 5.1 surround sound tracks and two stereo tracks.

To find out why there are two of each, I'd try simply listening to them.

I think you can open the m2ts file directly in VLC, then switch between audio tracks while watching.

Mediainfo may also reveal more about the tracks.

If that doesn't help, then I'd try looking at the spectrogram using Spek, or escalate things with pkane's Deltawave or Xivero Musicscope (though I'm not sure whether the last two can read AC-3).

 

[beaker152]

Mediainfo revealed the track details I was looking for--thank you!

but now I've run into another question: does anyone know how to get the mapping from the disc menu options to m2ts files/frame?