1080p avi acting like low specs

have an avi with 1080p res and 5 mb of video and both vlc and this app cant work with it properly, only movist was capable of playin it fine. curious that dont happen with another 38 mb 1080p *.ts file i constantly watch (26 gb of video), that one plays perfect, this avi is like the computer is too old and doesnt fit hardware requirement. choppy display and sound at slow speed.
im on a hackintosh core 2 quad q 6600, 4 gb memory, xfx 8600 gt 500mb video, snow leopard all working no issue. maybe hd avi´s r too hard to handle for now?

this is the specs for the avi, mediainfo scan:


General
Complete name : Sydney Symphony Orchestra 2011-11-17/Sydney Symphony Orchestra 2011-11-17.avi
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 4.03 GiB
Duration : 1h 46mn
Overall bit rate : 5 407 Kbps
Writing application : PotEncoder

Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L4.0
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Codec ID : H264
Duration : 1h 46mn
Bit rate : 5 000 Kbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.080
Stream size : 3.74 GiB (93%)
Writing library : x264 core 112
Encoding settings : cabac=0 / ref=1 / deblock=1:0:0 / analyse=0x1:0x111 / me=dia / subme=1 / psy=1 / psy_rd=0.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=0 / threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=290 / keyint_min=25 / scenecut=0 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=5000 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00

Audio
ID : 1
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 2000
Duration : 1h 46mn
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
Delay relative to video : 38s 408ms
Stream size : 293 MiB (7%)
Alignment : Split accross interleaves
Interleave, duration : 32 ms (0.96 video frame)
Interleave, preload duration : 73 ms

AVI's are handled by software, so any hardware video decoding that you might get normally won't apply to this file. You can try something like MKVtools to remux it to an MKV file, so that you don't have to re-encode it. If that fails, then you probably have to re-encode it with Handbrake.

is it software procesing too slow on my equipment? no app workaround? thank for the reply.

avi is a crap video container, we can't trust it with hardware decode so decoding is handled with software decode.
you don't have enough ponies to software decode it or it's just a crap avi encode.