[x264-devel] Re: x264 177 with no intra macroblocks feature

[champ yen]

On Fri, 18 Mar 2005 12:00:02 +0200 (EET), Tuukka Toivonen
<tuukkat at ee.oulu.fi> wrote:
> On Fri, 18 Mar 2005, champ yen wrote:
> 
> > Dear all:
> >    Finally, I decide to add the feature first.
> >    The URL below is the x264 with a new "noimb" parameter. It is based on 177.
> >    http://www.ccns.ncku.edu.tw/~champ/x264_noimb.tgz
> 
> Nice. I made proper patch using "svn diff" out of it:
> http://www.ee.oulu.fi/%7Etuukkat/tmp/x264-r177-noimb.patch
> Can you elaborate when this feature would be useful? It looks to me that
> for x264 end-user it might not be very useful (unless it improves video
> encoding). Might be useful in (my) research, though.
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Search the best intra mode after inter macroblock mode decision sucks very much.
It uses much computation for only about 3% optimization. So it will be
a good tradeloff to disable Intra macroblock for performance reason.
When will be a good chance to use the feature?
Hmmm...such as realtime video capture/recording and video conferencing.
Of course maybe someone will not want to wait for a long time to
encode a video file.

sincerely yours
champ yen
==
Champ Yen
http://www.ccns.ncku.edu.tw/~champ/

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