Transparent logos, aegisub and AviSynth

[shorto]

Hello!

To be blunt and fast is there a way to insert a .png logo with a transparent layout in either the .ass file or Avisynth script?

Cheers

[poisondeathray]

you can do it with avisynth and overlay()

[shorto]

I'm a total noob with avisynth scripts so i basicly do a overlay(LINKTOTHEFILENAME) ? how do i position it then?

Edit: and time it of course.

[poisondeathray]

use x and y coordinates to move them, or position them when you generate your logo (i.e. make the png the same size as your video frame dimension, and move the logo wherever you want in your image editor)

http://avisynth.org/mediawiki/Overlay

e.g.

a1=AviSource("file.avi")
a2=ImageSource("logo.png",pixel_type="RGB32")
Overlay(a1,a2,mask=a2.ShowAlpha(),x=50,y=50)

In this example, I moved it x=50, y=50


To time it, cut it up into segments with trim(), so that you only apply the logo to sections that you want

e.g.

a=AviSource("file.avi").Trim(0,100)
b=AviSource("file.avi").Trim(101,200)
c=AviSource("file.avi").Trim(201,300)
 
b2=ImageSource("logo.png",pixel_type="RGB32").
b3=Overlay(b,b2,mask=b2.ShowAlpha(),x=50,y=50)
 
a++b3++c

In this example, I divided the video into sections from frames 0-100, 101-200, 201-300 , and the logo is applied to the middle section only

[shorto]

Tnx! It worked perfectly! Now for one more question how do I make a fade in/out, not just pop in?

[poisondeathray]

You would normally use fade() or fadeio() or one of it's variants
http://avisynth.org/mediawiki/Fade

But there seems to be a problem with fading out for the overlay. The workaround was to reverse the clip and use fadein. See this thread for more info:
https://forum.videohelp.com/threads/305020-AviSynth-JDL_ApplyRange()-FadeIn()-Compatibility-Issue

Maybe someone has an easier way, but it seems to work

[Gavino]

But there seems to be a problem with fading out for the overlay.

The reason fade out didn't work in the other thread was because the logo clip was longer than the clip it was overlayed onto - the fade out was beyond the end of the visible part!

So you need something like this, to make the lengths match:

a1=AviSource("file.avi")
a2=ImageSource("logo.png",pixel_type="RGB32", end=a1.frameCount)
Overlay(a1,a2,mask=a2.ShowAlpha().FadeIO0(20),x=50,y=50)

(here for a 20 frame fade in and out)

[shorto]

Hum I actually pulled it off but the problem now is that the video & audio don't match exactly. Here's my code:

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\TIVTC.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\dgdecode.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\telecidehints.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\fieldhint.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\RemoveGrain.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\nnedi.dll")


function Preset0(clip c) {
#Name: Default
c
removegrain(mode=1)
return last
}

a=DirectShowSource("C:\Users\shorto\Desktop\enkoding\commandline\uverworld.avi",  fps=23.976).Trim(0,120)
b=DirectShowSource("C:\Users\shorto\Desktop\enkoding\commandline\uverworld.avi",  fps=23.976).Trim(121,167)
c=DirectShowSource("C:\Users\shorto\Desktop\enkoding\commandline\uverworld.avi",  fps=23.976).Trim(168,5647)
d=DirectShowSource("C:\Users\shorto\Desktop\enkoding\commandline\uverworld.avi",  fps=23.976).Trim(5648,5783)

b2=ImageSource("logo.png",pixel_type="RGB32")
b3=Overlay(b,b2,mask=b2.ShowAlpha().FadeIn(27),x=0,y=75)
d4=Overlay(d,b2,mask=b2.ShowAlpha().FadeIn(27),x=0,y=75)
 
a++b3++b3.reverse()++b++c++d++d4

Spline36Resize(720,544)
TextSub("C:\Users\shorto\Desktop\enkoding\commandline\karanew.ass")

What did I miss? I mean the fades are perfect now only this problem remains :P

[Gavino]

a++b3++b3.reverse()++b++c++d++d4

You've got section 'b' repeated 3 times (once in reverse) and section 'd' twice. Is this what you want?
The 'reverse' trick is unnecessary if you follow my post above.
Also, you should use AviSource instead of DirectShowSource, especially when trimming, since the latter is not always frame-accurate.

[shorto]

I basicly need the logo to appear 2 times, one time with fade in and fade out the other time only fade in. That's why I inserted the b so many times.

[Gavino]

You probably want something like:

v=AviSource("C:\Users\shorto\Desktop\enkoding\commandline\uverworld.avi)
a=v.Trim(0,120)
b=v.Trim(121,167)
c=v.Trim(168,5647)
d=v.Trim(5648,5783)

b2=ImageSource("logo.png",pixel_type="RGB32")
b3=Overlay(b,b2,mask=b2.ShowAlpha().Trim(0,46).FadeIO0(27),x=0,y=75)
d2=Overlay(d,b2,mask=b2.ShowAlpha().FadeIn(27),x=0,y=75)
 
a++b3++c++d2

[shorto]

Script error: expected a, or)

What does that mean? xD It's stated for the line "b2=ImageSource("logo.png",pixel_type="RGB32") "

[poisondeathray]

The reason fade out didn't work in the other thread was because the logo clip was longer than the clip it was overlayed onto - the fade out was beyond the end of the visible part!

nice catch gavino!

[poisondeathray]

Script error: expected a, or)

What does that mean? xD It's stated for the line "b2=ImageSource("logo.png",pixel_type="RGB32") "

It usually means you have an extra bracket, comma, or quotation mark. Post the full script (copy & paste) and error

[shorto]

Here we go! xD

The script:

LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\TIVTC.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\dgdecode.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\telecidehints.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\fieldhint.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\RemoveGrain.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\nnedi.dll")


function Preset0(clip c) {
#Name: Default
c
removegrain(mode=1)
return last
}

v=AviSource("C:\Users\shorto\Desktop\enkoding\commandline\uverworld.avi)
a=v.Trim(0,120)
b=v.Trim(121,167)
c=v.Trim(168,5647)
d=v.Trim(5648,5783)

b2=ImageSource("logo.png",pixel_type="RGB32")
b3=Overlay(b,b2,mask=b2.ShowAlpha().Trim(0,46).FadeIO0(27),x=0,y=75)
d2=Overlay(d,b2,mask=b2.ShowAlpha().FadeIn(27),x=0,y=75)
 
a++b3++c++d2

Spline36Resize(720,544)
TextSub("C:\Users\shorto\Desktop\enkoding\commandline\karanew.ass")

The error:

AviSynth script error:
Script error: expected a , or)
(C:\Users\shorto\Desktop\enkoding\commandline\TEST ZA PVJE.avs, line 22, column 20)

[poisondeathray]

I'm not seeing any errors. Are you sure that's the correct (current) script? Did you save it and re-open it ?

If you scroll up to post#4, I had a typo, I had a "." at the end of that line that shouldn't be there

[Gavino]

You're missing the quote at the end of the filename:

v=AviSource("C:\Users\shorto\Desktop\enkoding\commandline\uverworld.avi)

Whoops, my fault - looks like I left it out in post #11 when I cut and pasted your earlier script - sorry.

[shorto]

Tnx so much to the both of you! It works perfectly now!