theora dev - May 2004 - New experimental theora implementation

Derf's from-scratch alternate implementation of the theora codec is now 
publicly available from our subversion repository.

    http://svn.xiph.org/experimental/derf/theora-exp/

This exciting new codebase promises superiour performance, and the encoder
is capable of higher quality output than the current represenation, taking
advantage of the bitstream extension we've added to the original VP3 format.

Unfortunately, the encoder is currently broken, but this is still a good
codebase for playing with new features. Thanks to Derf for making it 
available.

 -r
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> Unfortunately, the encoder is currently broken, but this is still a good
> codebase for playing with new features. Thanks to Derf for making it 
> available.
Just to be clear, it produces valid bitstreams (using features not yet 
supported in the reference decoder), but the quality is horrible. That 
just means the psychovisual model is broken, not the rest of it.
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> Derf's from-scratch alternate implementation of the theora codec is now
> publicly available from our subversion repository.
> 
>     http://svn.xiph.org/experimental/derf/theora-exp/
> 
> This exciting new codebase promises superiour performance, and the encoder
> is capable of higher quality output than the current represenation, taking
> advantage of the bitstream extension we've added to the original VP3
format.
> 
> Unfortunately, the encoder is currently broken, but this is still a good
> codebase for playing with new features. Thanks to Derf for making it 
> available.
<p>How about setting up some downloadable nightly tar-balls
of all the projects in the svn?

<p>Jens
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Ralph Giles wrote:
> Unfortunately, the encoder is currently broken, but this is still a good
> codebase for playing with new features. Thanks to Derf for making it 
> available.
May I assume that it´s well known that not only the encoder is broken 
but also the decoder? Although the new decoder accepts files created 
with alpha3 there are plenty of blocky artifacts... looks as if 
sometimes blocks are predicted from a wrong frame... or like a problem 
with motion-vectors.

Maik


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