John Ribera wrote:
> 
> I noticed lots of people running yuvdenoise AND using the -N option on
> mpeg2enc.
> 
> isn't this redundant?
NO.

Because the mpeg2enc -N option does not filter material. Or analyze the
image to denoise. It discarges the high frequency parts of the image. 
Ususally the higher frequency is noise. But high frequency is also a
change from one edge of the colors  to a other like Black -> White. So
this option also soften sharp changes in a picture you might want to
keep. 

Keep in you mid a chess board with black and white pixles over the whole
screen. 
This image has the higest possible bandwith needed (for PAL its at
5MHZ). If you use the -H option will completly disort that image to
something gray anything. 

Very likely the denoise will not do the same because the colors are to
differnet and detect the changes a edges where the denoise does not have
to do anything. 

auf hoffentlich bald,

Berni the Chaos of Woodquarter

Email: [EMAIL PROTECTED] [EMAIL PROTECTED]
www: http://www.lysator.liu.se/~gz/bernhard


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