[x264-devel] Re: [x264 SVN-623] rate-control miserably fails with -m6 or -m7

[Loren Merritt]

On Tue, 27 Feb 2007, Guy Bonneau wrote:

>> BTW, don't ever encode a bitrate/resolution combination that needs
>> average QP>40. It will look better if you downscale. e.g. your clip
>> looks better at 224x192 QP=39 than at 352x288 QP=45 (both 56 kbps).
>
> Loren that's an interesting point. Can you provide some links or some
> literature that provides guideline about when scaling Vs QP. I guess
> some investigation must have been done regarding that matter.

I don't have any particular links, but the term to google for is 
"compressibility test". Most of the hits will probably refer to xvid and 
not x264, but it's the same idea.

--Loren Merritt

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