avisynth stackvertical/horizontal alternatives?

[BabaG]

i know i can stack vertically and horizontally with avisynth but am looking for a little more nuance than i've seen so far.

i have three files, each 1440x1080p, that i want to compare. i want to stack them with the first two side by side. i know i can use stack horizontal for that. what i haven't seen yet is a way to stack the third in the center below the first two. how can i do that? i guess what i'd ideally like is more control over the exact positioning within a defined frame size.

thanks,
babag

[poisondeathray]

a=whateversource
b=whateversource
c=whateversource

stackvertical(stackhorizontal(a,b) , c.addborders(c.width/2,0,c.width/2),0)

Or if you want more flexible over the x-position, enter the value

xpos = 200
a=whateversource
b=whateversource
c=whateversource
d=blankclip(width=c.width*2)

stackvertical(stackhorizontal(a,b) , overlay(d,c, x=xpos))

[BabaG]

thanks, pdr! never would have thought of that on my own. makes perfect sense now that i see it, though.

the xpos version is even better!

thanks again,
babag

[BabaG]

just getting to trying this as my renders have taken a couple of days.

getting errors with the suggested code and my files.

first was easy to solve. just a misplaced parentheses in this line:

stackvertical(stackhorizontal(a,b) , c.addborders(c.width/2,0,c.width/2),0)

changing the next to last parentheses position allows script to load:

stackvertical(stackhorizontal(a,b) , c.addborders(c.width/2,0,c.width/2,0))

second example is beyond my ability to find the error:

Overlay: input and overlay clips must have the same bit depths!

i'm guessing it may be in this line:

d=blankclip(width=c.width*2)

i believe this creates a dummy clip that has twice the width of clip c. all of the files i'm compositing here are 10bit x264. i'm guessing that the dummy or blank clip is not? if that's right, i don't know how to change it to match the other clips.

thanks,
babag

[poisondeathray]

Sorry, it should be d=blankclip(c, width=c.width*2)

blankclip(x) makes a blankclip the characteristics of clip "x", including dimensions, pixel type, fps etc...

[BabaG]

yeah! very cool. thanks so much! works a charm!

babag