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

[Tuukka Toivonen]

On Tue, 21 Oct 2003, D Richard Felker III wrote:

>> LAVC
>> -sws 2 -ovc lavc -lavcopts vcodec=mpeg4:vqscale=2:vme=1:vhq:keyint=20 -oac copy -vop scale=512:288

Uhhuh. What an awful options. Never use vme=1. Instead, use

mencoder -mc 0 -noskip -skiplimit 0 -ovc lavc -lavcopts
vcodec=mpeg4:vhq:trell:mbd=2:vmax_b_frames=1:v4mv:vb_strategy=0:vlelim=0:vcelim=0:cmp=2:subcmp=2:precmp=2:predia=1:dia=1:vme=4

It will be *faster* _and_ *better quality*.

>> 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

Never ever use vme=1 (until this is fixed:
>              motion  estimation method.  Note: 0-3 currently ig-
>              nores the amount of Bits spent, so quality  may  be
>              low.  Available methods are:
). That's why.

>In fact at constant-qscale, vme=1 will probably give maximal quality,

No, it doesn't. At higher quantization levels vme=1 needs even 50% larger
file for the same quality than vme=4. See
http://www.ee.oulu.fi/~tuukkat/mplayer/tests/tt-test2/vme.eps
It's simply hugely worse than vme=4, not to even mention that it's about 5
times slower.