[MPlayer-dev-eng] [RFC] change lacv's MPEG-4 encoding options defaults NOSPAM

Rich Felker dalias at aerifal.cx
Fri Dec 30 04:30:38 CET 2005


On Thu, Dec 29, 2005 at 02:13:11PM +0200, Ivan Kalvachev wrote:
> > Maybe with latest Michael's commits, further tests should be done to
> > find the new best speed/quality tradeoff, but until then, what do you
> > guys think?
> 
> I must say that i am also against this change.

Glad someone else is..

> 1. 'turbo' overrides 'mbd' and set it to 0. It also disables v4mv,
> qpel, trellis,cbp,mv0,qprd and makes search diamand really small. In
> short the given line have only benefith because 'turbo' sets mb_cmp=2
> (hadamand).

Agree, turbo is a very bad default.

> I think mbd=2 is not good default because (AFAIK) it is supposed to
> work for bitrate only.

No, mbd=2 is for constant-quant too. It will reduce filesize and
possibly also increase quality.

Rich




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