x264 with rate distortion optimized subpixel motion estimation

[giandrea]

What is this Rate Distortion Optimization I see has been checked in the CVS? :)

rate-distortion optimized MB types in I- and P-frames (--subme 6)

[Tommy Carrot]

What is this Rate Distortion Optimization I see has been checked in the CVS? :)
It's basicly the same as the VHQ modes in xvid, it means that the encoder is able to find the more-or-less optimal way to code the macroblocks, which should result in better quality at the cost of much slower encoding speed.

[Sharktooth]

1.5/2 times slower actually.

[Rrrough]

The new rate-distortion optimized MB types are really great, the picture quality is a lot more stable !
great work, congratulations !

cheers

[bond]

i now played around with rdo in x264 and got the following results:

4,00 fps, psnr avg: 42,66 global 42,39 <- me5 hex
3,04 fps, psnr avg: 42,87 global 42,61 <- me6 hex (rdo)

2,20 fps, psnr avg: 42,91 global 42,65 <- me6 umh
0,76 fps, psnr avg: 42,90 global 42,65 <- me6 esa

so enabling rdo (--subme 6) was ~ 25% slower than with --subme 5 on my sample, but also brought a relatively big quality increase (measured in psnr)


splitted this to an own thread

[berrinam]

Just wondering -- who writes the mencoder man page? Because information like this should really go there.

[Doom9]

Just wondering -- who writes the mencoder man page? Because information like this should really go there.akupenguin updates the x264 part of the mencoder manpage whenever he commits his latest code.. if RDO isn't in the mencoder CSV yet, then naturally it won't be on the mencoder manpage either.

[celtic_druid]

http://www1.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/libmpcodecs/ve_x264.c.diff?r1=1.29&r2=1.30
RDO was added 2 days ago.

[bond]

Just wondering -- who writes the mencoder man page? Because information like this should really go there.
its already there:
subq=<1-6>
...
6: Enables rate-distortion optimization of mac- roblock types in I- and P-frames. (best)

[berrinam]

Sorry, I was referreng to this page (http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-x264.html)