Quantcast Sansgrip Filters: More Info on Legal Clip - digitalFAQ.com Forums [Archives]
  #1  
11-22-2002, 03:33 AM
LadyMiles LadyMiles is offline
Free Member
 
Join Date: Sep 2002
Posts: 124
Thanks: 0
Thanked 0 Times in 0 Posts
What "problems" do the pixels cause to the television that are out of the color range ?
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  
11-22-2002, 09:23 AM
SansGrip SansGrip is offline
Free Member
 
Join Date: Nov 2002
Location: Ontario, Canada
Posts: 1,135
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LadyMiles
What "problems" do the pixels cause to the television that are out of the color range ?
That's just the way I've read about it: "problems", never anything more explicit. I don't imagine it does anything destructive, perhaps just messes up colour representation or something.

The more important benefit of using LegalClip, though, is that by clipping out-of-range colours in your Avisynth script you're not forcing the encoder to spend bits describing pixels that may not even appear on the TV set.
Reply With Quote
  #3  
11-22-2002, 01:52 PM
LadyMiles LadyMiles is offline
Free Member
 
Join Date: Sep 2002
Posts: 124
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks SansGrip.
I was just wondering if it helped with blocky dark colors or bad gradients. So the tv scale in dvd2avi doesn't do well in making sure colors are legal
Reply With Quote
  #4  
11-22-2002, 04:47 PM
SansGrip SansGrip is offline
Free Member
 
Join Date: Nov 2002
Location: Ontario, Canada
Posts: 1,135
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by LadyMiles
I was just wondering if it helped with blocky dark colors or bad gradients.
Probably not.

Quote:
Originally Posted by LadyMiles
So the tv scale in dvd2avi doesn't do well in making sure colors are legal
Actually if you use mpeg2dec, that DVD2AVI setting is ignored. It's only relevant if you use DVD2AVI's built-in YV12->RGB conversion.
Reply With Quote
  #5  
11-23-2002, 02:39 PM
SansGrip SansGrip is offline
Free Member
 
Join Date: Nov 2002
Location: Ontario, Canada
Posts: 1,135
Thanks: 0
Thanked 0 Times in 0 Posts
Here's a new version of LegalClip (and the source code).

The only difference is I rewrote the main loop in assembler and added SSE-optimized code for CPUs that support it (Intel Pentium III and better, AMD Athlon and better).

In other words, it's much much faster .

Note that the SSE code will only be used if the width of the clip is a multiple of four.
Reply With Quote
  #6  
11-23-2002, 03:20 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
Ahh!, I guess the automatic mirroring is working
I just checked www.kvcd.net/sansgrip/avisynth and your new "Legal" filter showed up. BTW: You bought a book on "Assembly Language Programming" a couple of days ago, because you mentioned that you had to learn assembly language. Two days later you crank out a new filter with assembly code
Let me know what they fed you, so I can change my diet, and see if my brain can asimilate at least 10% of your speed learning I need that bad
Great work SansGrip

-kwag
Reply With Quote
  #7  
11-23-2002, 05:53 PM
SansGrip SansGrip is offline
Free Member
 
Join Date: Nov 2002
Location: Ontario, Canada
Posts: 1,135
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by kwag
Ahh!, I guess the automatic mirroring is working
Cool -- I need to start including both addresses in the docs.

Quote:
Originally Posted by kwag
BTW: You bought a book on "Assembly Language Programming" a couple of days ago, because you mentioned that you had to learn assembly language. Two days later you crank out a new filter with assembly code
Well it's not quite as impressive as it sounds. I did sort of learn assembler for the Motorola 680x0 chips about ten years ago, and while the Intel architecture is quite different it's conceptually the same.

Also, LegalClip is very, very, very simple. The C code inner loop is basically

Code:
if(luma_pixel < 16)
   luma_pixel = 16;
else if(luma_pixel > 235)
   luma_pixel = 235;
if(chroma_pixel < 16)
   chroma_pixel = 16;
else if(chroma_pixel > 240)
   chroma_pixel = 240;
That's about the easiest thing to convert into assembler I can think of, which is why I started with this filter .

Quote:
Originally Posted by kwag
Let me know what they fed you, so I can change my diet
Maybe all that genetically modified food isn't such a bad thing...
Reply With Quote
  #8  
11-24-2002, 07:21 AM
vico1 vico1 is offline
Free Member
 
Join Date: Sep 2002
Location: USA
Posts: 103
Thanks: 0
Thanked 0 Times in 0 Posts
@SansGrip or Kwag,
where would be a good place to put Legal Clip in the script...in relation
to the placement of the other plugins? (Fluxsmooth,Blockbuster)

I found those two plugins do a great job on the movie "The Matrix"
that I`m working with now.
I`ve decided to drop NoMoSmooth when working with these plugins, as it
seemed to darken the scenes a little too much, in an already dark movie.

SansGrip, these plugins are great!..





***************************************
They can put a man on the moon,
but they still can`t put a tin pan in a microwave.......UNKNOWN
Reply With Quote
  #9  
11-24-2002, 08:40 AM
urban tec urban tec is offline
Free Member
 
Join Date: Nov 2002
Location: West Australia
Posts: 272
Thanks: 0
Thanked 0 Times in 0 Posts
Hi vico1
check this link, there is a copy of the script Kwag is using, you willsee that Legal clip is used in two places.
http://www.kvcd.net/forum/viewtopic....1604&start=105
Reply With Quote
  #10  
11-24-2002, 01:07 PM
vico1 vico1 is offline
Free Member
 
Join Date: Sep 2002
Location: USA
Posts: 103
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks tec,
I kinda` thought I`d seen it answered before....forgot where.
(mental note).....use the search..





***************************************
They can put a man on the moon,
but they still can`t put a tin pan in a microwave.......UNKNOWN
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Legal clip en el script del avs v 2.5? Eidan69 Convertir y Codificar Video (Español) 4 02-21-2004 01:58 PM
SansGrip Filters: Legal clip for avs 2.52 CaLaFaT Avisynth Scripting 5 07-11-2003 09:18 AM
TMPGEnc: Error message, Legal Clip: Source must be YUY2 MUS Video Encoding and Conversion 5 03-11-2003 01:30 PM
SansGrip Filters: SansGrip Is Back Thread! Jellygoose Avisynth Scripting 8 02-28-2003 04:57 AM
SansGrip Filters: Lastest script for blockbustor + legal clip? syk2c11 Avisynth Scripting 1 11-24-2002 02:22 AM

Thread Tools



 
All times are GMT -5. The time now is 06:10 AM  —  vBulletin © Jelsoft Enterprises Ltd