Question about x264 1-pass rate control arithmetic

[clu]

I‘m studying x264 rate control arithmetic.In 1-pass,i can't get clearly about that how to use SATD value to get qp.There is any document can tell me the process about it?

i try to use a pointing DSP to achieve the 1-pass arithmetic,so i want to know is there a pointing arithmetic can take place of the floating arithmetic original?

TKS and Sorry for my poor English.

[xiejun06]

I am also study the rate control part of x264. After reading a article of Morreti(if you need, I can provide to you), I think this part maybe different from JM. According to the article, x264 use 5 methods of rc, which is from ffmpeg. I also want some detail information, maybe we can discuss about rc.

[clu]

i have got the “A qualitative overview of x264's ratecontrol methods By Loren Merritt”，and i have migrated the 1-pass airthmetic to DSP, but i dont know why we can predict qp used satd? is there any paper for reference

[xiejun06]

About the MAD and SATD, I remeber a paper said when using RDO, the performance of SATD is little better. The article you mentioned, I have read also. It don't have any detail about the alogrithm, I want know why set the parameter like this, why use this method, and so on.

[clu]

Maybe we got the same problem and both us wanted to know why x264 used this arith. Is it just based on exp?

[xiejun06]

I am also working on the rate control on DSP, and I have some problem about migration, would you provide me some help? thanks.
my email: xj19830801@163.com

[Dark Shikari]

x264's ratecontrol is much like a frame-based adaptive quantization; more complex frames (as judged by SATD) are given higher QPs, while less complex frames are given lower QPs.

[Sagekilla]

x264's ratecontrol is much like a frame-based adaptive quantization; more complex frames (as judged by SATD) are given higher QPs, while less complex frames are given lower QPs.

Does this apply likewise to constant rate factor mode, in that x264 will allocate less bits towards a complex scene and more for the relatively calm ones?

[Dark Shikari]

Does this apply likewise to constant rate factor mode, in that x264 will allocate less bits towards a complex scene and more for the relatively calm ones?Yes. The only mode that doesn't use this approach is CQP.