[MEncoder-users] High quality encoding of anime and broken mencoder options

[RC]

On Wed, 5 Mar 2008 07:03:36 -0300
Jorge Peixoto de Morais Neto <please.no.spam.here at gmail.com> wrote:

> Hi. I seek high quality encoding of anime.

> The test source is a 105 MB avi file with FFV1 video and no audio. The
> video is 1201 576x432 frames at 25fps. 

> time mencoder -ovc lavc -o result.avi -lavcopts 
> vcodec=mpeg4:psnr:vbitrate=512:mbd=2:mv0:trell:v4mv:cbp:last_pred=3:p
> redia=3:dia=3:vmax_b_frames=2:vb_strategy=1:b_sensitivity=10:mbcmp=2:
> qpel:preme=2:keyint=300:vpass=2 testsource.avi

*cmp=2 should give better quality on animation.  vb_strategy=2 is
better. Setting nr= will probably improve quality.  qns=2 should also
help, if you don't mind a major slowdown.  You might also want to try
border_mask.

> 2) When reencoding a movie with slight compression artifacts, should I
> use -vf pp=ac? 

Absolutely not.  You'll just introduce noise, which will waste bits, and
make the resulting file look worse.