[MPlayer-dev-eng] [RFC] preliminary x264 encoding help text

Ken Johanson ken at kensystem.com
Mon May 2 21:54:49 CEST 2005


Guillaume POIRIER wrote:

>I'm not sure what profile x264 conforms to, but apparently, Google
>being my friend:
>http://forum.doom9.org/showthread.php?s=&threadid=89979
>
>x264 limitations: "x264 doesn't do any of extended profile or high
>profile. (Though "extended" is misleading, since it's all about error
>resilience, and is worse in compression ratio than main profile.)
>Properly dealing with adaptive interlacing in all cases takes lots of
>code. x264 doesn't support interlacing.
>There are a few other features not supported..."
>
>
>  
>
So presumable it does support Main profile then, since that wasn't 
mentioned in the list of unsupported profiles..

I'm trying to figure out if the weighted prediction is pretty much as 
good as it gets; I've seen several clips that don't encode gracefully 
when there is luminance fluctuation caused by camera auto-iris.. Having 
tried multiple other AVC encoders and getting the same results, I'm 
wondering if this is a limitation of the AVC design/spec (the same clips 
encodes with much fewer artifacts when using another 'popular' codec).

Ken
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