Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > General > Newbies

Closed Thread
 
Thread Tools Search this Thread Display Modes
Old 25th May 2012, 17:59   #1  |  Link
gioppatta
Registered User
 
Join Date: May 2012
Posts: 36
Avisynth filters function for XviD BRRip

Hi, I write for speak about filters to use ripping in 700MB a bluray source.
with a film of 2 or more hours at low bitrate (560/650/700)kbps
the quality go down...
so my question is:what are the filters to be used?
I'm refering especially to sharpener and denoiser.
I need an answer by an expert.
thank you!
gioppatta is offline  
Old 25th May 2012, 18:40   #2  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,923
Sharpening and denoising filters will not help you to compress a BluRay movie into 700MB!

You'll have to resize it to SD, at a minimum.

Why do you target 700MB?
Guest is offline  
Old 26th May 2012, 14:02   #3  |  Link
gioppatta
Registered User
 
Join Date: May 2012
Posts: 36
for movie encoding... I badly explained my question, I'm speaking about filters that increase quality at low bitrate...
gioppatta is offline  
Old 26th May 2012, 14:04   #4  |  Link
gioppatta
Registered User
 
Join Date: May 2012
Posts: 36
the what are the good sharpener and denoiser or serve others filters?

Last edited by Guest; 26th May 2012 at 20:05. Reason: rule 12
gioppatta is offline  
Old 26th May 2012, 14:15   #5  |  Link
Bloax
The speed of stupid
 
Bloax's Avatar
 
Join Date: Sep 2011
Posts: 319
Well AFAIK this function of mine is fine and dandy at reducing heavy noise flickering at low bitrates. Though the usability of it is usually pretty limited to really extreme cases.

Here's the function:
Code:
function CalmGrain(clip clp,int "tstr",int "bias1",int "bias2")
{
# Requirements: RemoveGrain, MaskTools2, RedAverage (Just look it up on Google.)
# By yours truly, Bloax.

# ~~~~~ Wuzzis now?
# This 'should' calm grain down, I can now say that it "should" improve compressibility by a little bit.
# It certainly reduces the eye-tearing effect of heavy noise compression artifacts post-encoding though. :-)
# ~~~~~

# ~~~~~ Wuzzis do now?
# "tstr" Is now the strength of ReduceFluctuations, which I found to be just the thing for noise.
# Due to the fact that it just "stupidly" moves pixels along - it's usually quite nasty. It's good for calming grain though! :P

# "bias*" Are the bias values for some of the masks, higher values (lower, actually) removes more "weak" spots.
# I wouldn't recommend going above negative values, and stay below -32. Mess around with it, or leave it. Basically.

# bias1 is for the main edge detection, higher (lower negative) values include more edges.
# And thus more noise might sneak in, ought to reduce artifacts a bit though. (Which may be quite important.)

# bias2 is for the noise mask, the lower the value, the less noise ought to be "caught", in theory.
# As said, just leave them, or mess around with them.

tstr = Default(tstr,16)
bias1 = Default(bias1,-64)
bias2 = Default(bias2,-128)

a = clp.IsYV12() ? clp : clp.ConvertToYV12()

msk=RAverageW(a,32,a.RemoveGrain(19,-1),-32,u=0,v=0,sse=8,bias=bias1) # Edges
msk2=Mt_Edge(a,"laplace",0,20,256,256) # Additional edges
msk3=Mt_Logic(msk,msk2,"max",sse3=true).RemoveGrain(1,-1) # Merging detected edges
noisemsk=RAverageW(a,32,a.RemoveGrain(17,-1),-32,u=0,v=0,sse=8,bias=bias2).Mt_Expand(sse3=true) # Finding noise
noisemskfin=Mt_Logic(msk3,noisemsk,"andn").ReduceFluctuations(64).RemoveGrain(2,-1) # Removing edges from noise mask.
RMerge(a,a.ReduceFluctuations(tstr),noisemskfin) # Merging, also trust me, you don't want edges in the mask. :)
}
Just dump it into a new .avsi file in your Avisynth plugins folder.

And is there a reason you'd prefer to use XviD instead of x264?

Sharpening for low bitrates is tricky business, also.
Bloax is offline  
Old 26th May 2012, 18:57   #6  |  Link
gioppatta
Registered User
 
Join Date: May 2012
Posts: 36
thank you I'll try it immediatly and the sharpener function?
gioppatta is offline  
Old 26th May 2012, 19:07   #7  |  Link
gioppatta
Registered User
 
Join Date: May 2012
Posts: 36
i use xvid for compaibility and for number of settings
gioppatta is offline  
Old 26th May 2012, 19:17   #8  |  Link
gioppatta
Registered User
 
Join Date: May 2012
Posts: 36



these are the results you'd like to reach...
gioppatta is offline  
Old 26th May 2012, 20:05   #9  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,923
Where do those screenshots come from?
Guest is offline  
Old 26th May 2012, 20:14   #10  |  Link
Didée
Registered User
 
Join Date: Apr 2002
Location: Germany
Posts: 5,390
Quote:
Originally Posted by gioppatta View Post
these are the results you'd like to reach...
Really? To me, those are results that I'd try to avoid by all means.
___

In regards to Xvid, 640x272, and 700MB rips: It seems you got the wrong exit out of a time tunnel.
Short briefing:

- The year is 2012. Not 2002, and not 1992.

- x264 produces x-fold better quality than Xvid.

- Needing Xvid for "compatibility" usually means your device is outdated.

- 700 MB rips are considered depreciated. 80GB-drives have been in 2002. In 2012, typical hardrive sizes are measured in TB's, i.e. "thousands of GB's".
__________________
- We´re at the beginning of the end of mankind´s childhood -

My little flickr gallery. (Yes indeed, I do have hobbies other than digital video!)
Didée is offline  
Old 27th May 2012, 11:28   #11  |  Link
gioppatta
Registered User
 
Join Date: May 2012
Posts: 36
the screens came from Extra torrent release group rips...
gioppatta is offline  
Old 27th May 2012, 11:37   #12  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,923
Closing for rule 6 violation. Please read and follow our forum rules.

http://forum.doom9.org/forum-rules.htm

You cannot mention or discuss such material here. Discussing how to duplicate results of such material is not allowed.

Last edited by Guest; 27th May 2012 at 11:39.
Guest is offline  
Closed Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 00:47.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.