[mythtv-users] x264 playback choppy

[Stephen Sassman]

My system is:

Athlon X2 4200+ (2200 MHz X 2)
Nvidia GeForce 7600GS

I have tried encoding with ffmpeg and avidemux (640x360 at 1600k) using
these settings

coder=1
flags=+loop
cmp=+chroma
partitions=+parti8x8+parti4x4+partp8x8+partb8x8
me_method=hex
subq=6
me_range=16
g=250
keyint_min=25
sc_threshold=40
i_qfactor=0.71
b_strategy=1
qcomp=0.6
qmin=10
qmax=51
qdiff=4
bf=3
refs=2
directpred=3
bidir_refine=1
trellis=1
flags2=+bpyramid+wpred+mixed_refs+dct8x8+fastpskip
threads=2

The picture quality is absolutely fantastic, but the playback seems choppy.
I am playing in mplayer. CPU load is only 25-30% on one core, so I think I
have plenty of horsepower. I am using the latest nvidia driver (177.82)
outputting 720p to my samsung flatscreen. Playback of transcoded vob-->mkv
is very bad (could be a interlacing issue) while mythtv mpg-->mkv is pretty
good but still a little choppy. Has anyone else had success with x264 in
linux. The picture is great, but unwatchable due to choppiness. Any ideas?
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