Quantcast Detect Scene Change Option in TMPGEnc? - digitalFAQ.com Forums [Archives]
  #1  
10-17-2003, 05:27 AM
Critter Critter is offline
Free Member
 
Join Date: Jun 2003
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Do I have to use Detect Scene Change option in tmpeg if I use these optimal scripts to convert avi to kvcd ?

I have always converted my avis (divx&xvid) with kwags optimal MA script (without detect scene change) and now I am going to test these scripts.
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Site Staff / Ad Manager
 
Join Date: Dec 2002
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
10-17-2003, 06:31 AM
Dialhot Dialhot is offline
Free Member
 
Join Date: May 2003
Posts: 10,463
Thanks: 0
Thanked 0 Times in 0 Posts
I use it personnaly but never did comparisons "with and without" to see what is better.
Reply With Quote
  #3  
10-17-2003, 11:13 AM
Jellygoose Jellygoose is offline
Free Member
 
Join Date: Jun 2002
Location: Germany
Posts: 1,288
Thanks: 0
Thanked 0 Times in 0 Posts
@Dialhot:

Depends on the GOP you're using. If you use the current GOP used in all KVCD templates you should turn that option off, since it breaks up a GOP and inserts a new I-Frame everytime TMPGENc finds a scenechange within a full GOP. This detection by TMPGEnc is very inaccurate with our MA script, so what it actually does is messing up your prediction and taking away some of the compression...
__________________
j3llyG0053
Reply With Quote
  #4  
10-17-2003, 12:16 PM
Dialhot Dialhot is offline
Free Member
 
Join Date: May 2003
Posts: 10,463
Thanks: 0
Thanked 0 Times in 0 Posts
JellyGoose, we do NOT use MA script for avi. So that is a slight different story. By the way I just checked in my default settings and I did a mistake : Dectect scene change is uncheck.
Reply With Quote
  #5  
10-17-2003, 01:58 PM
Jellygoose Jellygoose is offline
Free Member
 
Join Date: Jun 2002
Location: Germany
Posts: 1,288
Thanks: 0
Thanked 0 Times in 0 Posts
@dialhot: Sorry about that, I forgot in which forum I am. I still think it's better to have it unchecked since it splits up the GOP at some points of the movie, which can't be good for prediction...
So now we're in an agreement.
__________________
j3llyG0053
Reply With Quote
  #6  
10-17-2003, 05:04 PM
Boulder Boulder is offline
Free Member
 
Join Date: Sep 2002
Location: Lahti, Finland
Posts: 1,652
Thanks: 0
Thanked 0 Times in 0 Posts
I think that Kwag mentioned earlier that it should be enabled. It's also a part of the KVCD specs IIRC
Reply With Quote
  #7  
10-17-2003, 05:51 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Yes. Scene Detect should be enabled.
All the latest tests produced lower file size and better quality with SD enabled.

-kwag
Reply With Quote
  #8  
10-18-2003, 01:08 AM
Critter Critter is offline
Free Member
 
Join Date: Jun 2003
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Heh... I forgot how to enable that scene change thingy... I am using ToK.
Reply With Quote
  #9  
10-18-2003, 04:01 AM
Jellygoose Jellygoose is offline
Free Member
 
Join Date: Jun 2002
Location: Germany
Posts: 1,288
Thanks: 0
Thanked 0 Times in 0 Posts
Alright, then, sorry for giving wrong advice...
__________________
j3llyG0053
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Detect scene change big Conversion et d'Encodage de Vidéo (Français) 1 12-27-2003 12:48 PM
Avisynth: Detect scene change and TemporalCleaner ? NismoSX Avisynth Scripting 4 07-19-2003 12:20 PM
scene change - To detect or not to detect ? logan555 Video Encoding and Conversion 2 05-16-2003 02:34 AM
TMPGEnc: Detect Scene Change & Use Floating point DCT dazedconfused Video Encoding and Conversion 4 01-29-2003 11:44 PM
KVCD: Detect Scene Change? Pike Video Encoding and Conversion 1 08-08-2002 12:56 PM

Thread Tools



 
All times are GMT -5. The time now is 02:14 PM  —  vBulletin © Jelsoft Enterprises Ltd