Dither - a complementary script to fmtconv

[feisty2]

link https://github.com/IFeelBloated/VaporSynth-Functions/blob/master/Dither.py
dependency
fmtconv http://forum.doom9.org/showthread.php?t=166504


I never used Python once till yesterday, after a whole day of tutorial reading, I decided to port some popular functions from dither to vaporsynth mainly to see if I already handled what I got today or not
the only dependency of the script is "fmtconv"
I'm no programming expert, actually still a punk ass teen in high school according to my mom :)
so please correct me if something's wrong
hope it would be

[feisty2]

the only thing on my mind after writing this is omfg, no "^" in Expr function, seriously? why?
I'm gonna have to replace simple x y ^ to complex x log y * exp for what?
:(

[jackoneill]

With 16 bit clips, this

clip = self.Expr ([src1, src2], ["x y + 32768 -"])

is the same as

clip = core.std.MergeDiff(src1, src2)

only MergeDiff is likely faster.

Also with 16 bit clips,

clip = self.Expr ([src1, src2], ["x y - 32768 +"])

is the same as

clip = core.std.MakeDiff(src1, src2)

only MakeDiff is likely faster.

It's a good idea to always use the same number of spaces when indenting your Python code.

[feisty2]

Noted, will edit them when my Iceland trip is over
:)

[Myrsloik]

the only thing on my mind after writing this is omfg, no "^" in Expr function, seriously? why?
I'm gonna have to replace simple x y ^ to complex x log y * exp for what?
:(

Correct. I could add it but in the end it'd be an alias for the same expression anyway.

Some day I'll do proper runtime code generation instead...

[Reel.Deel]

Correct. I could add it but in the end it'd be an alias for the same expression anyway.

Some day I'll do proper runtime code generation instead...

I wouldn't mind seeing ^ even if it's just an alias, it'll make using existing expressions much easier. Wow, time flies, I asked about this almost 2 years ago (http://forum.doom9.org/showthread.php?t=165771&page=34) :eek:

[feisty2]

update:
did the suggested edits mentioned earlier
fixed a bug in limit_dif16 expr when ref clip != src clip

[feisty2]

update:
new function "clamp16", 16bpc version of "mt_clamp"
new function "SBR16", what's this actually? I dunno, just many scripts require it, looks like gaussian blur to me

[feisty2]

update:
completely rewritten
special thanks to @ Are_ for excellent script example
"class" stuff has been canceled
no more dizzy and messy avisynth script look like machine codes ("linear_and_gamma" function)

update2:
removed "merge16", it's useless, cuz I just found out "MaskedMerge" works at 16bpc

update3:
little fixes, please let me know if there's still something wrong or unnecessary or just stupid

[feisty2]

btw, could someone kind tell me where can I find the lwlibavvideosource binary for vaporsynth?
I searched both google and forum, all builds I found work on avs only

[GMJCZP]

Here (https://www.dropbox.com/sh/3i81ttxf028m1eh/AAABkQn4Y5w1k-toVhYLasmwa?dl=0).

Based in here (http://forum.doom9.org/showthread.php?p=1620108#post1620108).

Inside the package look for Vapoursynth folder.

[feisty2]

Here (https://www.dropbox.com/sh/3i81ttxf028m1eh/AAABkQn4Y5w1k-toVhYLasmwa?dl=0).

Based in here (http://forum.doom9.org/showthread.php?p=1620108#post1620108).

Inside the package look for Vapoursynth folder.

nice, thx!:)

[GMJCZP]

We must support new generations ;) .

[TurboPascal7]

if gcor != 1.0:
g2l = "{g2l} 0 >= {g2l} log {gcor} * exp {g2l} ?".format (g2l=g2l, gcor=gcor)
else:
g2l = g2l

if sigmoid is True:
g2l = build_sigmoid_expr (g2l , True , thr, cont)
l2g = build_sigmoid_expr (expr , False , thr, cont)
else:
g2l = g2l
l2g = expr

if gcor != 1.0:
l2g = "{l2g} 0 >= {l2g} log {gcor} * exp {l2g} ?".format (l2g=l2g, gcor=gcor)
else:
l2g = l2g

I know that I'm being a very bad person here and not helping anything, but could you please explain why the hell you're doing this?

[feisty2]

It's from the original dither (avisynth version), something's wrong?
Please tell me how I messed things up :(
And merry Xmas in advance

Edit: will fix "is" issue when I get back to hotel in the afternoon

[colours]

"x = x" effectively does nothing.

Avisynth scripts just tend to have statements of the form "x = condition ? x : y" because the ternary conditional operator requires a result regardless of whether the condition is true or false.

[feisty2]

update:
sbr16 and clamp16 are back (rewritten to vaporsynth style)

[feisty2]

update:
new func resize16nr, a few mods

[RTW47]

if dif == True: could be replaced with just if dif:
if fulls == False: could be replaced with if not fulls:
etc.

[feisty2]

if dif == True: could be replaced with just if dif:
etc.

alright, those were things I wrote when I was even more of a newbie than I am now, will edit them soon

update:
fixed an error in linear_and_gamma