Quantcast Blocks in Dark Scenes? - digitalFAQ.com Forums [Archives]
  #1  
07-01-2002, 06:58 AM
syk2c11 syk2c11 is offline
Free Member
 
Join Date: Jun 2002
Posts: 290
Thanks: 0
Thanked 0 Times in 0 Posts
I would really like to know how the sample (city-hall.mpeg) download from the main page was created. I have done a few movies with original KVCDx2 template (source is VOB files ripped from DVD). I can see blocks in dark sence, especially those "out-focus" background and under water scene. I have tried to vary the P and B from 0/20 to 0/0, still see block.

I use smartripper, DVD2AVI, FitCD, Virtualdub, and Tmpeg. Thanks
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  
07-01-2002, 03:02 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
Quote:
Originally Posted by syk2c11
I would really like to know how the sample (city-hall.mpeg) download from the main page was created. I have done a few movies with original KVCDx2 template (source is VOB files ripped from DVD). I can see blocks in dark sence, especially those "out-focus" background and under water scene. I have tried to vary the P and B from 0/20 to 0/0, still see block.

I use smartripper, DVD2AVI, FitCD, Virtualdub, and Tmpeg. Thanks
There was no special science in that clip
The source was IVTC'ed and encoded with the KVCD 352x480 NTSC template ( not the X2 ) without any modifications.
Verify that you have checked "Output YUV data as Basic YCbCr and CCIR601" in TMPEG's advanced settings.

kwag
Reply With Quote
  #3  
07-02-2002, 02:45 AM
syk2c11 syk2c11 is offline
Free Member
 
Join Date: Jun 2002
Posts: 290
Thanks: 0
Thanked 0 Times in 0 Posts
Kwag,
Thanks for your hint. What is "Demacrovision" in Smartripper all about? some guide says it should be checked (Sefys says so) and some says it should not. Will this option make any difference in the final KVCD output??
Reply With Quote
  #4  
07-02-2002, 02:53 AM
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
Quote:
Originally Posted by syk2c11
Kwag,
Thanks for your hint. What is "Demacrovision" in Smartripper all about? some guide says it should be checked (Sefys says so) and some says it should not. Will this option make any difference in the final KVCD output??
Read all about it here
http://www.macrovision.com/

kwag
Reply With Quote
  #5  
07-02-2002, 08:22 PM
deltaboy deltaboy is offline
Free Member
 
Join Date: Apr 2002
Location: BC, Canada
Posts: 108
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by kwag
Verify that you have checked "Output YUV data as Basic YCbCr and CCIR601" in TMPEG's advanced settings.
kwag
hey KWAG,

i remember talking to you about this in the past. i thought we came to the conclusion that this makes the video untrue or whatever. are you using a PC or TV scale under the video options in DVD2AVI? i know this makes the blacks definately black, but wont it make the picture too dark?

... nevermind, the issue was never closed: http://www.kvcd.net/forum/viewtopic.php?t=88&highlight=

im really confused now.
Reply With Quote
  #6  
07-02-2002, 08:49 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
Quote:
Originally Posted by deltaboy
Quote:
Originally Posted by kwag
Verify that you have checked "Output YUV data as Basic YCbCr and CCIR601" in TMPEG's advanced settings.
kwag
hey KWAG,

i remember talking to you about this in the past. i thought we came to the conclusion that this makes the video untrue or whatever. are you using a PC or TV scale under the video options in DVD2AVI? i know this makes the blacks definately black, but wont it make the picture too dark?

... nevermind, the issue was never closed: http://www.kvcd.net/forum/viewtopic.php?t=88&highlight=

im really confused now.
It really depends on the source. If the source is already CCIR601 ( as in DVD's ), you check this option. If not, it's better to leave it off. Just remember that the colors and brightness levels will look different in a PC than in your TV set with this option set.

kwag
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Avisynth: Script for blocks in dark scenes? AdamJ Avisynth Scripting 1 01-14-2005 09:58 AM
Is there a way to avoid small blocks in dark scenes? big Video Encoding and Conversion 1 10-18-2003 12:15 PM
Mosquitoes, blurriness & macroblocks in dark scenes? MrTibs Video Encoding and Conversion 4 04-09-2003 02:27 PM
KVCD: lot of VERY dark scenes? Paul0889 Video Encoding and Conversion 3 12-30-2002 01:19 AM
KVCD: Dark scenes problem! ARAGORN Video Encoding and Conversion 3 10-21-2002 11:20 AM

Thread Tools



 
All times are GMT -5. The time now is 11:56 AM  —  vBulletin © Jelsoft Enterprises Ltd