[theora] NHW Project - new -l8 "very high compression" setting

Raphael Canut nhwcodec at gmail.com
Sun Aug 19 15:35:42 UTC 2018


The -l8 "very high compression" setting I posted was not really good.Now I
have corrected and improved it, and now the -l8 quality setting is really
better, more precision and more neatness.

I think now it is a good setting, and I have started to compare it with
x265 and it can be now competitive.

More at: http://nhwcodec.blogspot.com/

Do not hesitate to test it and give me your feedback!

Many thanks!

2018-08-18 0:15 GMT+02:00 Raphael Canut <nhwcodec at gmail.com>:

> Hello,
> For those interested, I have added a -l8 "very high compression" setting
> to the NHW Project.
> I have added an experimental processing to remove details and preserve
> neatness.I have also now a fast estimation of entropy of wavelet
> coefficients and I use it accordingly to the image complexity but it is a
> very first version... With these new processings, the entropy coding
> schemes are less efficient, and so we could save for -l8 setting nearly 2KB
> per compressed .nhw file in average, will have to improve them...
> This new -l8 setting has so a good neatness to the detriment of details.It
> is still experimental, but I find it competitive with x265 (HEVC).
> Update at: http://nhwcodec.blogspot.com/
> Any feedback is very welcome!
> Cheers,
> Raphael
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