[MPlayer-DOCS] incomprehensibility in encoding guide
Bircoph at list.ru
Fri Jan 5 18:50:41 CET 2007
On 4 Jan 2007 23:41 Corey Hickey wrote:
> Guillaume POIRIER wrote:
> >> > > > As far as I can tell from the code and a couple quick
> >> > > > tests, the situation with mbd and mbcmp is still the
> >> > > > same: when all other *cmp options are 0 (the default),
> >> > > > making mbcmp nonzero will have a beneficial effect on
> >> > > > quality regardless of what mbd is set to. When mbd is
> >> > > > set to 1 or 2, the specific value of mbcmp is ignored,
> >> > > > except to check whether it is nonzero. When mbd is 0,
> >> > > > the specific value of mbcmp matters.
> >> > >
> >> > > So, maybe manpage should be updated to clarify this?
> >> >
> >> > Like this?
> >> Almost, but IMHO it would be nice to mention that "When mbd
> >> is set to 1 or 2, the specific value of mbcmp is ignored,
> >> except to check whether it is nonzero." or something similar.
> > Isn't that overly verbose?
> Actually, it might not be verbose enough to be to precise. This
> isn't any more fun to read, but should match the actual
> "When mbd is set to 1 or 2, the value of mbcmp is ignored when
> comparing macroblocks. If any comparison setting (precmp,
> subcmp, cmp, or mbcmp) is nonzero, however, a slower but better
> half-pel motion search will be used, regardless of what mbd is
> set to. If qpel is set, quarter-pel motion search will be used
I'm OK with the last variant.
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