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-   -   KDVD: CCE 2,3,4,5 Pass Compared to CQ (http://www.digitalfaq.com/archives/encode/13932-kdvd-cce-2345-a.html)

Shibblet 11-02-2005 09:28 PM

CCE 2,3,4,5 Pass Compared to CQ
 
Alright, I've done some tests, and I cannot find any visual differences between the 2, 3, 4, and 5 pass tests, compared to a 20 CQ value on CCE.

Anyone out there know what the differences are for the 5 passes (or more)?

kwag 11-02-2005 11:39 PM

Personally, I think that anything over four passes (with CCE), is visually indistinguisheable from 20, 30, 100 passes :!:
The difference (if any!) will only be seen by zooming in on detailed materials, which are absolutely invisible on a TV set (even HDTV).
For practical purposes, I wouldn't go over three passes.

-kwag

Dialhot 11-03-2005 05:40 AM

And to answer to your question : there is no (distinguishable) diff between 3 passes and Q=20. That is why we prefer to use OPV mode : we reach the same result in the third of the time ! (plus a little amount of time for prediction).

Prodater64 11-03-2005 06:21 AM

Quote:

Originally Posted by Dialhot
And to answer to your question : there is no (distinguishable) diff between 3 passes and Q=20. That is why we prefer to use OPV mode : we reach the same result in the third of the time ! (plus a little amount of time for prediction).

And what prediction routine do you use?

Dialhot 11-03-2005 06:33 AM

Quote:

Originally Posted by Prodater64
And what prediction routine do you use?

Q curve in CCE is linear, not like CQ in Tmpgenc. So a manual prediction is very easy : encode at Q=20, note the filesize, encode at Q=30 then some easy maths to determine the correct Q that will permit to reach the correct filesize.

To help me in finding whqt is the correct filesize I simply use KDVDCalc that Vmesquita did some months ago.

Boulder 11-03-2005 08:41 AM

The curve is not linear..I'm sure tylo would have discovered that when he designed the D2SRoBa plugin.

EDIT: See here : http://www.saunalahti.fi/sainki/RoBaQFinder12.zip

Dialhot 11-03-2005 09:04 AM

Quote:

Originally Posted by Boulder
The curve is not linear..I'm sure tylo would have discovered that when he designed the D2SRoBa plugin.

A lot more than CQ in Tmpgenc at least. And this is even more true because everything I encode is in the range 20-30. That is very narrow.
On the range 0 to 100, the curve is probably not so linear.

sparskter 11-03-2005 11:43 AM

Quote:

Originally Posted by Dialhot
And to answer to your question : there is no (distinguishable) diff between 3 passes and Q=20. That is why we prefer to use OPV mode : we reach the same result in the third of the time ! (plus a little amount of time for prediction).

Have you ever used CCEFRONT to perform the OPV mode?

CCEFRONT
http://forum.doom9.org/showthread.ph...light=ccefront

Dialhot 11-03-2005 12:18 PM

Quote:

Originally Posted by sparskter
Have you ever used CCEFRONT to perform the OPV mode?

CCEFRONT
http://forum.doom9.org/showthread.ph...light=ccefront

I did but only to use CCE in batch mode (using a perl script I did to call CCEFront). I never use the Roba mode that is, according to the documentation (or perhaps I read that on some forums) not really efficient in ccefront.


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