[x264-devel] Re: x264_slicetype_frame_cost

[Gabriel Bouvigne]

Loren Merritt a écrit :
> On Tue, 19 Jun 2007, Gabriel Bouvigne wrote:
> 
>> Today's question is about x264_slicetype_frame_cost.
>> I'm trying to understand what are p0, p1, b referring to.
>>
>> I first thought that p0 and p1 could be references to the first L0 and 
>> L1 frames, and b the candidate frame.
> 
> yes

Thanks.

So as I assumed, x264_slicetype_frame_cost( h, &a, frames, 0, 2, 1, 0 ) 
means that you we are computing the cost of a frame B at pos 1 inside 
frames[], using the frame at pos 0 as L0 and the frame at pos 2 as L1.

However, in the case of x264_slicetype_frame_cost( h, &a, frames, 0, 2, 
2, 1 ), I am a bit puzzled. That would mean evaluating the frame at pos 
2, using frame at pos 0 as L0 and frame at pos 2 as L1. My problem is 
that we then have frame at pos 2 mentioned twice.
Does this implicitly mean that if the evaluated frame is also mentioned 
as L0 or L1, we are then evaluating a P frame?


Regards,


-- 
Gabriel Bouvigne
www.mp3-tech.org
personal page: http://gabriel.mp3-tech.org

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