MKV from NAS stutters-but not if local drive is attached ... strange ? bug?

my wd tv live plays 10 sec’s of large mkv’s over network (i.e. SMB share) as soon as i attach a local drive to either usb port, the phenomenon is gone. Does the WDTVLIVE has a memory problem - and swaps to local drives ? Is that a bug ?

Just how large an MKV are you talking about?   What’s the bitrate?

Post the TEXT output of MEDIAINFO to find out.

http://mediainfo.sourceforge.net

happens to “every” fullhd mkv … but heres one that showed the symptoms

btw. Im on a gbit ethernet

Format                           : Matroska
File size                        : 10.0 GiB
Duration                         : 1h 56mn
Overall bit rate                 : 12.3 Mbps
Encoded date                     : UTC 2008-02-07 21:22:53
Writing application              : mkvmerge v2.1.0 (‘Another Place To Fall’) built on Aug 19 2007 13:40:07
Writing library                  : libebml v0.7.7 + libmatroska v0.8.1

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L5.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 10 frames
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 1h 56mn
Bit rate                         : 11.0 Mbps
Width                            : 1 920 pixels
Height                           : 800 pixels
Display aspect ratio             : 2.40:1
Frame rate                       : 23.976 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.299
Stream size                      : 8.76 GiB (88%)
Writing library                  : x264 core 58 svn-736M
Encoding settings                : cabac=1 / ref=10 / deblock=1:-2:-1 / analyse=0x3:0x113 / me=umh / subme=6 / me-prepass=0 / brdo=1 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=0 / threads=6 / nr=0 / decimate=0 / mbaff=0 / bframes=16 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / bime=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=2pass / bitrate=11003 / ratetol=1.0 / rceq=‘blurCplx^(1-qComp)’ / qcomp=1.00 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:0.5:13.0
Language                         : English

Audio #1
ID                               : 2
Format                           : AC-3
Format/Info                      : Audio Coding 3
Mode extension                   : CM (complete main)
Codec ID                         : A_AC3
Duration                         : 1h 56mn
Bit rate mode                    : Constant
Bit rate                         : 640 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                      : 534 MiB (5%)
Language                         : German

Audio #2
ID                               : 3
Format                           : AC-3
Format/Info                      : Audio Coding 3
Mode extension                   : CM (complete main)
Codec ID                         : A_AC3
Duration                         : 1h 56mn
Bit rate mode                    : Constant
Bit rate                         : 640 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                      : 534 MiB (5%)
Language                         : English

That’s simply not supported by the chip… you’ll never get it to play successfully.

You’ll have to actually use settings the device supports when you make your encodes, if you want the device to play them properly.

that file actualy plays,

as soon as I attach a local usb drive.

I could still stream from smb, just a local drive needs to be attached.

The point was, the specs for the Sigma chip inside (and that WD lists in the manuals and online) is that only up to L4.1 is supported.

You’re never going to convince anyone at WD that problems with playing back L5 files are a “bug”.  Nobody ever said the file would play at all.

And, since the chip doesn’t nominally support the file, you’re never going to convince WD to “fix” it… the only answer you’re ever going to get from them is to try playing supported files.