BD-D5700 stutters on mkv with 6 channel AC3 audio?

Hi,
I have owned a BD-D5700 for a couple of weeks now, and just switched to Serviio from AllShare. I'm much happier that I was with AllShare. I'm not sure why but the player refuses to play Matroska video files that contain 6 channel AC3 audio. 2 channel files play well. Below are two examples, one file which plays (2 channel audio) and one that doesn't (6 channel audio). The 6 channel file stutters constantly. Has anyone else had this problem? Can I get Serviio to transcode the audio for me, or is there a better solution (or none)?

Thanks in advance...

[Example 1, no problem]
FFmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers
built on Jan 10 2011 21:46:22 with gcc 4.4.2
configuration: --enable-static --disable-shared --disable-shared --disable-ffplay --disable-ffserver --enable-memalign-hack --enable-libmp3lame --arch=x86 --enable-runtime-cpudetect --enable-w32threads --target-os=mingw32 --cross-prefix=i686-mingw32-
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 0 / 0.16. 0
libavcodec 52.108. 0 / 52.108. 0
libavformat 52.92. 0 / 52.92. 0
libavdevice 52. 2. 3 / 52. 2. 3
libavfilter 1.72. 0 / 1.72. 0
libswscale 0.12. 0 / 0.12. 0
[matroska,webm @ 0175cb60] Estimating duration from bitrate, this may be inaccurate

Seems stream 1 codec frame rate differs from container frame rate: 47.95 (48000/1001) -> 23.98 (48000/2002)
Input #0, matroska,webm, from 'xyz3.mkv':
Duration: 00:58:42.24, start: 0.000000, bitrate: 384 kb/s
Stream #0.0: Audio: ac3, 48000 Hz, stereo, s16, 384 kb/s
Stream #0.1(eng): Video: h264, yuv420p, 1280x720, PAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc
At least one output file must be specified


General
Unique ID : 0 (0x0)
Complete name : K:\Video\Television\xyz\xyz3.mkv
Format : Matroska
File size : 1.46 GiB
Duration : 58mn 42s
Overall bit rate : 3 555 Kbps
Encoded date : UTC 2010-02-22 21:41:29
Writing application : no_variable_data
Writing library : no_variable_data

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 58mn 42s
Bit rate : 3 162 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.143
Stream size : 1.27 GiB (87%)
Writing library : x264 core 85 r1442tw
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=30 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=6 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / wpredp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=3162 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English

Audio
ID : 1
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 58mn 42s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 161 MiB (11%)


[Example 2, 'stuttering' playback]
FFmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers
built on Jan 10 2011 21:46:22 with gcc 4.4.2
configuration: --enable-static --disable-shared --disable-shared --disable-ffplay --disable-ffserver --enable-memalign-hack --enable-libmp3lame --arch=x86 --enable-runtime-cpudetect --enable-w32threads --target-os=mingw32 --cross-prefix=i686-mingw32-
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 0 / 0.16. 0
libavcodec 52.108. 0 / 52.108. 0
libavformat 52.92. 0 / 52.92. 0
libavdevice 52. 2. 3 / 52. 2. 3
libavfilter 1.72. 0 / 1.72. 0
libswscale 0.12. 0 / 0.12. 0
[matroska,webm @ 0112cb60] Estimating duration from bitrate, this may be inaccurate

Seems stream 1 codec frame rate differs from container frame rate: 47.95 (48000/1001) -> 23.98 (48000/2002)
Input #0, matroska,webm, from 'xyz5.mkv':
Duration: 00:54:14.46, start: 0.000000, bitrate: 384 kb/s
Stream #0.0: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s
Stream #0.1(eng): Video: h264, yuv420p, 1280x720, PAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc
At least one output file must be specified


General
Unique ID : 0 (0x0)
Complete name : K:\Video\Television\xyz\xyz5.mkv
Format : Matroska
File size : 1.46 GiB
Duration : 54mn 14s
Overall bit rate : 3 847 Kbps
Encoded date : UTC 2010-02-22 21:41:29
Writing application : no_variable_data
Writing library : no_variable_data

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 54mn 14s
Bit rate : 3 454 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.156
Stream size : 1.28 GiB (88%)
Writing library : x264 core 85 r1442tw
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=30 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=6 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / wpredp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=3454 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English

Audio
ID : 1
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 54mn 14s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 149 MiB (10%)

[Illico]

... I'm not sure why but the player refuses to play Matroska video files that contain 6 channel AC3 audio. 2 channel files play well. Below are two examples, one file which plays (2 channel audio) and one that doesn't (6 channel audio).

You are right, seems the only difference were
Stream #0.0: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s
Stream #0.0: Audio: ac3, 48000 Hz, stereo, s16, 384 kb/s

The 6 channel file stutters constantly. Has anyone else had this problem? Can I get Serviio to transcode the audio for me, or is there a better solution (or none)?

Could you confirm you sued "Samsung TV / player (C/D-series)" profile?
Could you check on Serviio Console if "Stereo" or "Keep Original" will be enabled on transcoding tab?

So this file must be delivered in native format, could you confirm by checking the serviio log file (before enable detailed logging, see my signature links)
Yes, Serviio could transcode audio, but that will be done for all your MKV/H264/AC3, not necessary.

Hi,
Thanks for responding!

I did use the "Samsung TV/player (C/D-series)" profile - although the status screen shows "unrecognized device" for the device name, but it works anyway.

"Downmix to stereo" is enabled.

I am not sure what to look for in the log file.

[Illico]

"Downmix to stereo" is enabled.

Could you try enable "Keep original", restart serviio service or reboot?

I am not sure what to look for in the log file.

Just enable detailed logging (see signature) and post here the file.

[zip]

The C/D profile transcodes hardly anything, so I doubt the Downmix to Stereo checkbox change will have any effect.

[Illico]

The C/D profile transcodes hardly anything, so I doubt the Downmix to Stereo checkbox change will have any effect.

Right, I had forgotten that this option is only used during transcoding.