6.1 FLAC Audio - no sound

I have a Blu-Ray rip of a movie, but when I try to play it in MPC I get the following error:

Media Player Classic could not render some of the pins in the graph, you may not have the needed codecs or filters installed on the system.

The following pin(s) failed to find a connectable filter:
Audio Switcher::Out (only one in drop down)

Code:

C:\eva1.0\Evangelion_1.11_-_You_Are_(Not)_Alone_[3xR][Blu-ray.1080p.H264.FLAC][v2][7086ED9B].mkv::Japanese, Japanese 6.1 Audio (FLAC) (Audio 1)
CoreFLAC Audio Decoder::XForm Out
Audio Switcher::Out

Media Type 0:
--------------------------
Audio: WAVE_FORMAT_EXTENSIBLE 48000Hz 7ch 5376Kbps

AM_MEDIA_TYPE: 
majortype: MEDIATYPE_Audio {73647561-0000-0010-8000-00AA00389B71}
subtype: MEDIASUBTYPE_PCM {00000001-0000-0010-8000-00AA00389B71}
formattype: FORMAT_WaveFormatEx {05589F81-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 1
cbFormat: 40

WAVEFORMATEX:
wFormatTag: 0xfffe
nChannels: 7
nSamplesPerSec: 48000
nAvgBytesPerSec: 672000
nBlockAlign: 14
wBitsPerSample: 16
cbSize: 22 (extra bytes)

WAVEFORMATEXTENSIBLE:
wValidBitsPerSample: 16
dwChannelMask: 0x00000000
SubFormat: {00000001-0000-0010-8000-00AA00389B71}

pbFormat:
0000: fe ff 07 00 80 bb 00 00 00 41 0a 00 0e 00 10 00 þÿ..€»...A......
0010: 16 00 10 00 00 00 00 00 01 00 00 00 00 00 10 00 ................
0020: 80 00 00 aa 00 38 9b 71                         €..ª.8›q

After I skip the error video plays, but there is no audio.

VLC has the same problem.

Video Inspector:

Code:

File Name : C:\eva1.0\Evangelion_1.11_-_You_Are_(Not)_Alone_[3xR][Blu-ray.1080p.H264.FLAC][v2][7086ED9B].mkv
File Size : 8.99 Gb.

[Movie]
Valid : Yes [Matroska]
Duration : 00:29:26
Movie complete : Yes

[Video]
Resolution : 1920x1080
Codec : MPEG4 ISO advanced
FPS : 23.98
BitRate : 0 Kbps
Quality Factor : 0.00 b/px

[Audio]
Codec : FLAC
Number of channels : 7
Sample Rate : 48000 Hz
BitRate : 16 Kbps

Any suggestions?

 

Well I managed to get the audio working only to discover that the audio is stretched way out of sync. It's fine at the beginning, but as the video goes on the audio gets more and more out of sync.

Probably no easy solution for this right?

 

I just made another discovery... the ending credits are in perfect sync (at least with the karaoke). Now I am really confused. I skipped through the video and found that practically everything was a bit out of sync.