Quantcast KVCD: Which GOP for Cartoons? - digitalFAQ.com Forums [Archives]
  #1  
10-23-2003, 06:46 AM
Encoder Master Encoder Master is offline
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I've read in the KVCD Spezification the best GOP for Cartoons is 15 Frames for PAL.
But in one thread kwag has written 12 Frames for Pal.
Quote:
For Anime/Cartoon material:
Same as DVD clean material, but shorten the GOP to 12 frames (PAL) or 15 (NTSC)
http://www.kvcd.net/forum/viewtopic....e0f0985ff9e9e2
But what is correct?
Hope you can quickly help me?
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  #2  
10-23-2003, 07:41 AM
kwag kwag is offline
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For PAL, use 12 for cartoons.

-kwag
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10-23-2003, 11:34 AM
Edlund Edlund is offline
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Should I use 15 for NTSC?
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10-23-2003, 11:47 AM
jorel jorel is offline
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yes, 15 for ntsc cartoons!
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  #5  
10-23-2003, 12:51 PM
Encoder Master Encoder Master is offline
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But the spezification say another. But when you say it I believe in you.

Thanx
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  #6  
10-23-2003, 01:15 PM
jorel jorel is offline
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Quote:
Originally Posted by Encoder Master
But the spezification say another. But when you say it I believe in you.

Thanx
ok Encoder Master,
but where is wrote different?


please,post the link!

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  #7  
10-23-2003, 02:21 PM
CheronAph CheronAph is offline
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http://www.kvcd.net/portal/articles.php?lng=en&pg=20

For animation, old cartoons, etc., we recommend a maximum GOP size of 12 pictures for NTSCFilm (23.973fps), 15 pictures for PAL (25fps) and 18 pictures for NTSC (29.97fps).
It's also recommended to set "Scene change detection", if the encoder permits.
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  #8  
10-23-2003, 04:47 PM
jorel jorel is offline
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thanks Cheron!

maybe Kwag change it later!
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  #9  
10-24-2003, 12:12 PM
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Quote:
It's also recommended to set "Scene change detection", if the encoder permits.
Only with cartoons or also another Movies?
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  #10  
10-24-2003, 01:21 PM
kwag kwag is offline
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The basic idea is to use a smaller GOP with cartoons, than with a regular movie.
Every movie is different, so you should make your own short tests, depending on the movie.
Just keep the GOP size about half the size of a regular movie, for cartoons.
If KVCD's GOP is normally 24, a value of around 12 will be ok for both NTSC and PAL.

-kwag
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  #11  
10-29-2003, 11:11 AM
mistermickster mistermickster is offline
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I think I've asked this question before, with no reply, but what effect does the GOP have
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  #12  
10-29-2003, 04:20 PM
kwag kwag is offline
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Quote:
Originally Posted by mistermickster
I think I've asked this question before, with no reply, but what effect does the GOP have
The shorter (up to a certain point!), will give you higher quality, at the expense of larger file size.
Too short, will give better quality, only if you increase the bitrate.
The best quality will be I frames only, with a bitrate of 50,000Kbps

-kwag
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