[menno]

Dear all,

I notice some stuttering on my setup.
I got a atv2 with 6 dec nightly, and a debian NAS (atom d525).

I run a wired setup and playback only h264 (4.1 profile) material.

I tried a/v sync off a/v sync video clock and a/v sync audio clock

Here's the xbmc log
(5MB)

//removed

this is the media info;


General
Unique ID : 2515596981111643595586703801134941493 86 (0xBD40A2B2B49FA766A6FCEA179BA6090A)
Complete name : twiz-margincall-1080p.mkv
Format : Matroska
Format version : Version 2
File size : 7.91 GiB
Duration : 1h 47mn
Overall bit rate : 10.5 Mbps
Encoded date : UTC 2011-12-07 07:50:09
Writing application : mkvmerge v4.8.0 ('I Got The...') buil t on May 24 2011 03:12:58
Writing library : libebml v1.2.0 + libmatroska v1.1.0

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Muxing mode : Header stripping
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 47mn
Bit rate : 9 070 Kbps
Width : 1 920 pixels
Height : 1 080 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) : 0.182
Stream size : 6.62 GiB (84%)
Writing library : x264 core 120 r2119 0637cd6
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / ana lyse=0x3:0x133 / me=umh / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_ range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_ps kip=0 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint =250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=2pas s / mbtree=1 / bitrate=9070 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qp step=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English
Default : Yes
Forced : No

Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Muxing mode : Header stripping
Codec ID : A_DTS
Duration : 1h 47mn
Bit rate mode : Constant
Bit rate : 1 510 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossy
Stream size : 1.14 GiB (14%)
Language : English
Default : Yes
Forced : No


This is ping info to NAS

Apple-TV:~ root# ping 192.168.1.3
PING 192.168.1.3 (192.168.1.3): 56 data bytes
64 bytes from 192.168.1.3: icmp_seq=0 ttl=64 time=0.406 ms
64 bytes from 192.168.1.3: icmp_seq=1 ttl=64 time=0.385 ms
64 bytes from 192.168.1.3: icmp_seq=2 ttl=64 time=0.392 ms
64 bytes from 192.168.1.3: icmp_seq=3 ttl=64 time=0.375 ms
--- 192.168.1.3 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.375/0.390/0.406/0.000 ms


This is an ftp transfer from NAS to ATV2


ftp> get habemus.papam.2011.720p.bluray.x264.sample-cinefile.mkv
200 PORT command successful.
150 Opening BINARY mode data connection for habemus.papam.2011.720p.bluray.x264.sample-cinefile.mkv (52999965 bytes).
WARNING! 328016 bare linefeeds received in ASCII mode
File may not have transferred correctly.
226- [Ul: 1550930.9MB] [Dl: 1309007.6MB] [Speed: 3127.82K/s] [Free: 1249140MB]
226 [Section: DEFAULT] [Credits: 873.0MB] [Ratio: Unlimited]
52999965 bytes received in 17.8 seconds (2972694 bytes/s)
ftp> quit

//edit

I think i found the problem, which might help others as well.
I run a 1043 ND (TP-LINK) router, and with its latest factory firmware it causes problems experienced above, after loading it with a DD WRT firmware problems have disappeared.
I couldnt say if atv2 in particular is picky, i had quite good results with its orignal firmware when it comes down to data transfer etc.

If you do experience stuttering with the tp link router try dd wrt firmware on it!