[MPlayer-cvslog] CVS: main/DOCS/tech snow.txt,1.4,1.5
poirierg at gmail.com
Fri Apr 22 10:54:30 CEST 2005
On 4/22/05, Oded Shimon <ods15 at ods15.dyndns.org> wrote:
> On Sun, Apr 17, 2005 at 08:41:08PM +0200, Guillaume Poirier CVS wrote:
> > Modified Files:
> > snow.txt
> > Log Message:
> > Snow supports 3-pass mode and 9/7 wavelet doesn't work lossless mode.
> > Index: snow.txt
> > ===================================================================
> > RCS file: /cvsroot/mplayer/main/DOCS/tech/snow.txt,v
> > retrieving revision 1.4
> > retrieving revision 1.5
> > diff -u -r1.4 -r1.5
> > --- snow.txt 16 Apr 2005 21:53:20 -0000 1.4
> > +++ snow.txt 17 Apr 2005 18:41:05 -0000 1.5
> > @@ -37,10 +37,12 @@
> > You can add 256 to any of the options to enable chroma motion
> > estimation for that comparison (e.g. mbcmp=257 for SSD with chroma),
> > but it doesn't seem to help much for the moment.
> > + NOTE: 9/7 wavelet doesn't work with lossless mode.
> Doesn't this NOTE seem out of place?.. I don't see why it's said
> twice, and here..
You're probably right. It's just that if you have a look a the full paragraph:
* cmp, subcmp, mbcmp
Set the comparison function, default: 0 (SAD).
useful values = 0 (SAD), 1 (SSD), 11 (5/3 wavelet), 12 (9/7 wavelet).
Experience shows that SSD is the best most of the time, while SAD is
slightly better the remainder of the time.
You can add 256 to any of the options to enable chroma motion
estimation for that comparison (e.g. mbcmp=257 for SSD with chroma),
but it doesn't seem to help much for the moment.
NOTE: 9/7 wavelet doesn't work with lossless mode.
This paragraphs does talk about 9/7 wavelet.
Now, maybe I got confused by it, and it doesn't need to be there, or
maybe I'm right! ;-)
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