DivX 4: CQ vs VBR

[Evaldas]

Hi,

which one will yeld to better image quality with the same final size of the movie?

XviD 0.0.2 2001.12.05 1 pass constant quality
or
DivX 4.11 2 pass VBR with divx4log stats editor

The movie is without end credits. I have time, so I can encode several times with diferent quality settings (XviD CQ) to get desired filesize.

[-h]

If you set up your XviD session as:
- Lumi masking on
- Max quantiser 6 or 7

You'll get better results than DivX4 for the same file size, guaranteed.

I wouldn't feel comfortable using XviD for much outside experimentation and non-critical personal backups yet. It -is- under heavy development remember, and newer/better/faster is always on the horizon. A couple ME bugs have also been found and not yet fixed.

-h

[BetaBoy]

I would like to see some comparison screen shots so I can see the quality as described. -h? Anyone?

[-h]

gldblade made a preliminary comparison some time ago, but encore2 has undergone extensive development since then (almost twice as fast, quantiser thresholding, improved ME, etc.)

Isibaar wants to release a stable beta by Christmas, but I'd have issues with a comparison involving beta software anyway. Compiles (albeit slower non-ICL ones) are out there, and even 10 second samples are enough for me to ABX the compressed result, with XviD coming out on top.

To each their own.

-h

[Evaldas]

-h,

BTW, what is the optimum value for encoding quality in quality based mode? 80%? 90%? 95%? Cause 100% I think it would be an overkill.
If I'll get an undersized file, I will run new pass with the same quality and higher resolution. I have time :)

[-h]

I usually start at 90%, and go from there. The final ranges I've used for 1-CD rips have been 88% <= x <= 98%.

-h