[MPlayer-users] LAVC-MPEG4 vs DIVX4 vs XVID??

[JJ2Dogs]

Hi all. Finally I got some time to try out these 3 codecs. For testing I used the first 3 chapters of We were soldiers because the in the first scene there is the desert dust which is allways difficult for the codecs. Any way here is what I used for settings and some info... 
DIVX4: 
-sws 2 -ovc divx4 -divx4opts br=2200:q=5:crispness=100:key=50 -oac copy -vop scale=512:288 
speed was 24fps {very fast} 
output size was 305,1MB 
XVID: 
-sws 2 -ovc xvid -xvidencopts bitrate=2200:4mv:min_key_interval=50 -oac copy -vop scale=512:288 
speed was about 8fps 
output size was 307,3MB 
LAVC 
-sws 2 -ovc lavc -lavcopts vcodec=mpeg4:vqscale=2:vme=1:vhq:keyint=20 -oac copy -vop scale=512:288 
speed was 5fps 
output size was 461,7MB 
 
The best quality was the lavc codec then it was a bit better the xvid. But lavc is the winer in quality category... Divx was the fastest.. 
 
I wonder... Many people say that the lavc is faster than Divx?? So why it is so slow on my PC?? I got PIII-1Ghz 512Ram 128Mb-AGP.. Can any body tell me how to increase the speed? But the quality must be very good..
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