[FFmpeg-devel] Fw: Re: [issue986] Truemotion2 decoder - chroma issues

[Michael Niedermayer]

As roundup is broken again, i forward my replies here, or more precissely
what i get back from the broken server.

Also id like to repeat my request for a volunteer to properly admin
and fix roundup. We _DO_ need one.

Also id like to ask luca to keep me informed about every single byte he
changes that could affect roundup!
Currently my information about what is going on with roundup is exactly
zero. This is unacceptable

The situation is that stuff breaks that worked in the past and then a
extreemly terse comment is appeareing from luca somewhere that he fixed
something.
We need to fully document every problem and how it is fixed. I as project
leader feel responsible to get the darn tracker working and i cannot
without information where these absolutely unacceptable breakages come from.



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Content-Description: Undelivered Message
From: Michael Niedermayer <michaelni at gmx.at>
To: Kostya Shishkov <issues at roundup.ffmpeg.org>
Date: Thu, 23 Apr 2009 20:07:24 +0200
Subject: Re: [issue986] Truemotion2 decoder - chroma issues

On Wed, Apr 22, 2009 at 09:10:30AM +0000, Kostya Shishkov wrote:
> Well, output result seems fine to me too (I saw familiar words 
> 'luma' and 'chroma' in source code and was too lazy to look into 
> blitter code). But I suspect the best solution might be to 
> introduce another colorspace but if Michael will say it's not 
> needed, apply this patch.

the colorspace could be added to the yuv->rgb converteres, and we
finally could add a colorspace enum to AVCodecContext to indicate
which is used ...

The problem is that tm2 yuv seems to use 9bit for U & V this makes
it impossible to fit in any of the common pixel packings
thus it seems this has to be to converted in the decoder unless you
would use 16bit YUV420 but this seems really silly.

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Dictatorship naturally arises out of democracy, and the most aggravated
form of tyranny and slavery out of the most extreme liberty. -- Plato




----- End forwarded message -----

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The bravest are surely those who have the clearest vision
of what is before them, glory and danger alike, and yet
notwithstanding go out to meet it. -- Thucydides
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