[MEncoder-users] lavc or xvid

[RC]

On Sat, 25 Aug 2007 15:46:48 +1000
Alex Samad <alex at samad.com.au> wrote:

> What are the main difference between the 2.

Xvid destroys fine details for the sake of a smooth and artifact-free
picture, while FMP4 retains details at all costs.  Xvid encodes looks
much better at very low bitrates, while FMP4 looks much better if
you've got a bitrate high enough to avoid extensive artifacts.

> vcodec=mpeg4:threads=2:mbd=2:mv0:trell:v4mv:cbp:last_pred=3:predia=2:
> dia=2:vmax_b_frames=2:vb_strategy=1:precmp=2:cmp=2:subcmp=2:preme=2:q
> ns=2:aspect=16/9:dc=10:vbitrate=$VBITRATE

*cmp=2 makes for quite a bit of blockiness, and is usually a bad idea. 
It'll look much better without *cmp, or perhaps with 3 instead of 2. 
qns also only seems noticably to help with animation.

You're usually better off with 0 b-frames.