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sirt
25th December 2015, 09:51
Hi,

I bought Beyonce's album "Beyonce" (2013) which includes a BluRay with music videos. I extracted one single stream with MakeMKV, redefined manually chapters (MakeMKV didn't cut everything properly) then finally cut according to chapters' timecodes.

I obtain 18 videos with different tracks. Among them there is an LPCM 5.1 @ 24 bit. When I want to play one of the video with such track, surprise : it is not decoded, I only hear something similar to noise. I am forced to skip to another track (AC3).

After demuxing LPCM 5.1 @ 24 bit tracks, I used ea3cto in order to recode to 16 bits :

eac3to track1.wav track1_16bit.wav -23.976 -down16

It seems all converted tracks are reversed to 1536kbit/s @ 16 bits. I guess I have also recoded and lost quality... After remuxing, audio is played correctly in my BluRay TV player. Is there another MKV issue with LPCM @ 24 bits or is it just my BluRay TV Player ?

filler56789
25th December 2015, 11:09
eac3to's -down16 converts audio to 16-bit, not to stereo
(which would be "1536kbps", for 48kHz).

Is there another MKV issue with LPCM @ 24 bits or is it just my BluRay TV Player?

Just do a test with various software players on your PC.
If at least one of the well-known media players succeeds at handling 5.1 LPCM @ 24-bits in a Matroska container,
then the actual problem is a limitation in your's TV's firmware.