Stuttering video on 1080i .ts

I'm trying to watch a 1080i .ts video streamed from my NAS but all I get is a good sound with a stuttering picture.

My setup:
ATV 1 + Broadcom bcm70012 + Eden [XBMC 11.0 Git:20120321-14Feb09]

MediaInfo:

Quote:ID : 1 (0x1)
Complete name : London.2012.Final.Djokovic.vs.Federer.ENG.1080i.HDTV.H264.ts
Format : MPEG-TS
File size : 21.2 GiB
Duration : 3h 10mn
Overall bit rate mode : Variable
Overall bit rate : 15.9 Mbps

Video
ID : 514 (0x202)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=12
Codec ID : 27
Duration : 3h 10mn
Bit rate : 14.9 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.288
Stream size : 19.9 GiB (94%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 662 (0x296)
Menu ID : 1 (0x1)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Codec ID : 3
Duration : 3h 10mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 262 MiB (1%)
Language : English

Text
ID : 2305 (0x901)-888
Menu ID : 1 (0x1)
Format : Teletext Subtitle
Language : English

Pastebin:
http://pastebin.com/Q3JrbUsW

Any help is appreciated.
Thanks
G75