Quantcast KDVD: CCE 2,3,4,5 Pass Compared to CQ - digitalFAQ.com Forums [Archives]
  #1  
11-02-2005, 09:28 PM
Shibblet Shibblet is offline
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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)?
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  #2  
11-02-2005, 11:39 PM
kwag kwag is offline
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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
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  #3  
11-03-2005, 05:40 AM
Dialhot Dialhot is offline
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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).
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11-03-2005, 06:21 AM
Prodater64 Prodater64 is offline
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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?
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  #5  
11-03-2005, 06:33 AM
Dialhot Dialhot is offline
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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.
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  #6  
11-03-2005, 08:41 AM
Boulder Boulder is offline
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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
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  #7  
11-03-2005, 09:04 AM
Dialhot Dialhot is offline
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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.
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  #8  
11-03-2005, 11:43 AM
sparskter sparskter is offline
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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
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  #9  
11-03-2005, 12:18 PM
Dialhot Dialhot is offline
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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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