[MPlayer-users] performance regression in xvid encoding between 1.0-pre6 and 1.0-pre7

[Guillaume POIRIER]

Hi,

On 7/26/05, Marcin Slusarz <mslusarz at alan.umcs.lublin.pl> wrote:
> On Mon, Jul 25, 2005 at 08:45:31PM +0200, Guillaume POIRIER wrote:
> > On 7/25/05, Marcin Slusarz <mslusarz at alan.umcs.lublin.pl> wrote:
> > > hi
> > > after upgrading mplayer to 1.0-pre7 i noticed that encoding with mencoder is
> > > really slow. as i usually record and encode straight from the tv card and cpu
> > > load is at 96-99%, 60% regression is "noticable" ;) here are results from testings:
> >
> > I changed xvid defaults to improve default quality. Either go back to
> > last defaults (look at the man page of -pre6 for that) or look at our
> > xvid encoding guide (in the HTML docs) to see what options can be
> > disabled safely to improve speed.
> thanks for the answer. i found that these options are: vhq=0, nochroma_me,
> notrellis (and bvhq=0 but this does not impact performance).
> it would be nice if every option would have small marker - eg. +q as
> "improves quality" and +s as "improves speed".

I already advised you to have a look at our xvid encoding guide:
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-xvid.html
This should feature already the informations you're looking for.
Though this may be nice to fusion both documents from a user point of
view because this way you only have to look for information in a
single document, this would not be _that_ wise to do so because the
man page is already bigger than the one of GCC. To put it in a
nutshell, the man page is an exhaustive (and somewhat technical)
source of informations, and the HTML doc is supposed to be more of
sets of recipes to do all kind of stuff.


> another thing that might be
> improved in the docs are "defaults" - they are missing in many places which
> makes a bit difficult choosing right options...

Just consider that all options are off by default except options
marked as on by default.


> ps: there is a tiny mistake in vhq description - 0 and 1 are marked as default

Not in the CVS at least: http://www.mplayerhq.hu/DOCS/man/en/mplayer.1.html

Regards,

Guillaume
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