Avisynth: a Simple Way to Compare Two Scripts

Dialhot · #1 07-23-2005, 09:39 AM

As I bother to user MovieStacker just for that, this is a little avs script aimed to compare the result of two other scripts.

Simply put the code of the scripts in the function script1 and function script2.
The example below compare the original source (script1 empty) and the result of the greyscale() command.

Note: you can resize or do whatever you want in the scripts but be carefull that both scripts must produce clips with same parameters (size, fps, colorspace)

Code:

source=Mpeg2Source(...)

left=source.script1()
right=source.script2()

width=left.width()/2
height=left.height()

left=crop(left,0,0,width,height)
right=crop(right,width,0,width,height)

StackHorizontal(left.subtitle("Script1"),right.subtitle("Script2"))

function script1(clip c) {
c
#----- ENTER CODE OF SCRIPT ONE HERE -----

#----- END OF CODE OF SCRIPT ONE-----
}

function script2(clip c) {
c
#----- ENTER CODE OF SCRIPT TWO HERE -----
Greyscale()
#----- END OF CODE OF SCRIPT TWO-----
}

incredible · #2 07-23-2005, 12:15 PM

Nice!

And here also a nice compare function if you dont want to se a side by side but a "switching"-like comparison:

Code:

source=Mpeg2Source(...)
Interleave(script1(source).subtitle("Script1",10,20),script2(source).subtitle("Script2",10,20))


function script1(clip c) {
c
#----- ENTER CODE OF SCRIPT ONE HERE -----

#----- END OF CODE OF SCRIPT ONE-----
}

function script2(clip c) {
c
#----- ENTER CODE OF SCRIPT TWO HERE -----
Greyscale()
#----- END OF CODE OF SCRIPT TWO-----
}

Means: Do scroll to the Script1 frame you want to compare ... then step one frame forth. Now you see the Script2 version of the frame. Back n' Forth and Back'n forth gives you a nice comparing like in a "switching" way.

I do use this often when comparing encodings etc.

rds_correia · #3 07-23-2005, 02:34 PM

Uau! this one should become a sticky guys

Zyphon · #4 07-27-2005, 12:55 PM

Thanks guys for both methods this is a really useful script great work.

ginoboy · #5 09-13-2005, 08:37 AM

very good!

thanks guys!

Prodater64 · #6 10-23-2005, 05:21 AM

I know what is greyscale, but for what is it useful in those scripts?

digitall.doc · #7 10-23-2005, 05:28 AM

Prodater,
I think it was just an example...
Between this lines

Code:

#----- ENTER CODE OF SCRIPT ONE HERE -----

#----- END OF CODE OF SCRIPT ONE-----

you have to put the filters of scripts (1 and 2) you want to compare.

Inc and Dialhot compared no filter against greyscale() as an example.

danpos · #8 10-23-2005, 08:06 AM

Alternate

More instructions on own link.

Cya!

Prodater64 · #9 10-23-2005, 09:17 AM

Quote:

Originally Posted by danpos

Alternate

More instructions on own link.

Cya!

Thanks.

Prodater64 · #10 11-21-2005, 04:55 PM

A simple but usefull add:

Code:

source=Mpeg2Source(...) 

left=source.script1() 
right=source.script2() 

width=left.width()/2 
height=left.height() 

left=crop(left,0,0,width,height).addborders(0,0,2,0,$0000FF).crop(2,0,-0,-0)
right=crop(right,width,0,width,height).addborders(2,0,0,0,$0000FF).crop(0,0,-2,-0)

StackHorizontal(left.subtitle("Script1"),right.subtitle("Script2")) 

function script1(clip c) { 
c 
#----- ENTER CODE OF SCRIPT ONE HERE ----- 

#----- END OF CODE OF SCRIPT ONE----- 
} 

function script2(clip c) { 
c 
#----- ENTER CODE OF SCRIPT TWO HERE ----- 
Greyscale() 
#----- END OF CODE OF SCRIPT TWO----- 
}

It adds a vertical blue (you can change the color) line separating both clips.
The script crop 2 pixels at right and left sides to compensate the addborder in the midle, but most times those sides are black overscan zones.

Dialhot · #11 11-21-2005, 05:14 PM

Prodater64 · #12 11-21-2005, 05:34 PM

Quote:

Originally Posted by Dialhot

Prodater64 · #13 11-26-2005, 08:43 PM

Two more mods:

Compare left half of both scripts:

Code:

source=Mpeg2Source(...) 

left=source.script1() 
right=source.script2() 

width=left.width()/2 
height=left.height() 

left=crop(left,0,0,width,height).addborders(0,0,2,0,$0000FF).crop(2,0,-0,-0)
right=crop(right,0,0,width,height).addborders(2,0,0,0,$0000FF).crop(0,0,-2,-0)

StackHorizontal(left.subtitle("Script1"),right.subtitle("Script2")) 

function script1(clip c) { 
c 
#----- ENTER CODE OF SCRIPT ONE HERE ----- 

#----- END OF CODE OF SCRIPT ONE----- 
} 

function script2(clip c) { 
c 
#----- ENTER CODE OF SCRIPT TWO HERE ----- 
Greyscale() 
#----- END OF CODE OF SCRIPT TWO----- 
}

Compare right half of both scripts:

Code:

source=Mpeg2Source(...) 

left=source.script1() 
right=source.script2() 

width=left.width()/2 
height=left.height() 

left=crop(left,width,0,width,height).addborders(0,0,2,0,$0000FF).crop(2,0,-0,-0)
right=crop(right,width,0,width,height).addborders(2,0,0,0,$0000FF).crop(0,0,-2,-0)

StackHorizontal(left.subtitle("Script1"),right.subtitle("Script2")) 

function script1(clip c) { 
c 
#----- ENTER CODE OF SCRIPT ONE HERE ----- 

#----- END OF CODE OF SCRIPT ONE----- 
} 

function script2(clip c) { 
c 
#----- ENTER CODE OF SCRIPT TWO HERE ----- 
Greyscale() 
#----- END OF CODE OF SCRIPT TWO----- 
}

Does any body know how to do it (select one of three options L/R, L/L or R/R) with conditional switches (if mode == LR, if mode == LL, if mode == RR) in only one avs script.

Fluffbutt · #14 11-26-2005, 09:13 PM

I've been playing, but I can't see a way.

Avisynth ConditionalFilter does not allow for a variable to be set
(psuedocode: set Type=left, then test Type for "left").

Is there a way to make an avisynth runtime function give a predefined result that won't change throughout the life of the script?

We may have to wait for 3.0

"..Improved parser: the parser will include the widely requested flow control structs (if then else, for, while). It will add two new types : frame and function..."

Prodater64 · #15 11-27-2005, 01:03 AM

Quote:

Originally Posted by Fluffbutt

I've been playing, but I can't see a way.

I have it!!!

Code:

#############################################################################################

mode="LR" # "LR", "RR" or "LL"

#############################################################################################

source=Mpeg2source("")

left=source.script1()
right=source.script2()

width=left.width()/2
height=left.height()

left = (mode == "RR") ? crop(left,width,0,width,height).addborders(0,0,2,0,$0000FF).crop(2,0,-0,-0):crop(left,0,0,width,height).addborders(0,0,2,0,$0000FF).crop(2,0,-0,-0)
right = (mode == "LL") ? crop(right,0,0,width,height).addborders(2,0,0,0,$0000FF).crop(0,0,-2,-0):crop(right,width,0,width,height).addborders(2,0,0,0,$0000FF).crop(0,0,-2,-0)

StackHorizontal(left.subtitle("Script1"),right.subtitle("Script2")) 

function script1(clip c) { 
c 
#----- ENTER CODE OF SCRIPT ONE HERE ----- 

#----- END OF CODE OF SCRIPT ONE----- 
} 

function script2(clip c) { 
c 
#----- ENTER CODE OF SCRIPT TWO HERE ----- 
Greyscale() 
#----- END OF CODE OF SCRIPT TWO----- 
}

Fluffbutt · #16 11-30-2005, 05:10 AM

Hahah, brilliant.. I tried to set a variable, but couldn't get it to react with the scripts.

I was trying a if..then...else type arrangement; yours is a masterpiece!

Prodater64 · #17 12-01-2005, 05:26 AM

Quote:

Originally Posted by Fluffbutt

Hahah, brilliant.. I tried to set a variable, but couldn't get it to react with the scripts.

I was trying a if..then...else type arrangement; yours is a masterpiece!

Thanks.
It is, indeed, an if..then.
left = (mode == "RR") ? can be read as "if mode = "RR" then left = ...."
statement after "?" is the conditional statement.
statement after ":" is the "else" statement.

Fluffbutt · #18 12-03-2005, 04:12 AM

Quote:

Originally Posted by Prodater64

It is, indeed, an if..then.
left = (mode == "RR") ? can be read as "if mode = "RR" then left = ...."
statement after "?" is the conditional statement.
statement after ":" is the "else" statement.

Good grief! And programmers call that 'structure'? LOL! It seems wierd to me that = and == both mean 'equals' ("if mode = "RR" then left = ....").

Oh well.. Thanks again..

tengo6dedos · #19 02-14-2009, 03:42 PM

I do not know if someone will find it useful by now but I simply use:

Code:

DGDecode_Mpeg2Source(....)
a=last.
\      FFT3dfilter().
\      LanczosResize(x,y)  
#
#################
#
dfttest()
LanczosResize(x,y)
stackhorizontal(a,last)

top is for left screen n bottom if for right, *top filters must end with dot "." unless is the last one, same goes for the word "last"

saluts