04-20-2003, 01:53 PM
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In topic, http://www.kvcd.net/forum/viewtopic.php?t=3483 you suggest to shorten the gop with cartoons, do you mean max number of frames or...
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Someday, 12:01 PM
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04-20-2003, 01:58 PM
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Quote:
Originally Posted by CheronAph
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Yes. It's currently set at 24, so change that to 12 (PAL) or 15 (NTSC)
-kwag
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04-20-2003, 08:50 PM
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Kwag, why is shortening the GOP better for anime sources? 
Thanks in advance!
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04-20-2003, 08:55 PM
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Quote:
Originally Posted by heller
Kwag, why is shortening the GOP better for anime sources? 
Thanks in advance!
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It reduces the compression, but because of that, the I frames are tighter together and there are less forward/backward prediction (B and P) frames between I frames. So lower compression = higher quality, less artifacts, at the expense of larger file size
-kwag
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04-21-2003, 12:46 PM
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Thanks Kwag! Very important info when making kvcd's for the kids
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04-21-2003, 01:16 PM
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Thanks.
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04-21-2003, 02:26 PM
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Quote:
It reduces the compression, but because of that, the I frames are tighter together and there are less forward/backward prediction (B and P) frames between I frames. So lower compression = higher quality, less artifacts, at the expense of larger file size
-kwag
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Kwag- If I am doing NTSC @ 30 fps, would reducing the GOP to 1-15-2-15 give better quality than using 1-24-2-24?
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04-21-2003, 02:46 PM
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Quote:
Originally Posted by telemike
Kwag- If I am doing NTSC @ 30 fps, would reducing the GOP to 1-15-2-15 give better quality than using 1-24-2-24?
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If it's not anime, you'll barely notice any quality difference, but file size will be much larger with a GOP of 15.
-kwag
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04-21-2003, 07:08 PM
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Quote:
Originally Posted by kwag
Quote:
Originally Posted by heller
Kwag, why is shortening the GOP better for anime sources? 
Thanks in advance!
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It reduces the compression, but because of that, the I frames are tighter together and there are less forward/backward prediction (B and P) frames between I frames. So lower compression = higher quality, less artifacts, at the expense of larger file size
-kwag
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Great and clean explanation!
But that made me think... with lower compression you probably will have to lower the CQ value.
So which is better (for animes)?
Higher CQ with a larger GOP or Lower CQ with a tighter GOP?
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04-21-2003, 07:17 PM
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Quote:
Originally Posted by muaddib
So which is better (for animes)?
Higher CQ with a larger GOP or Lower CQ with a tighter GOP? 
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Lower CQ with tighter GOP. The longer the GOP, the more artifacts start to show. So it's a compromise
-kwag
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04-21-2003, 07:42 PM
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That's why I call you KWAG - THE ONE!
There is no one faster in the matrix... her, I mean in the net!
Thanks again kwag.
BTW, did you see the full trailer of MATRIX - RELOADED?
WOW man! That sequel is going to be AMAZING
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04-21-2003, 10:00 PM
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Oh yes, I saw the trailer. I can't wait to Co (Cough) go see it in the movies, and Co(Cough) buy the DVD
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