Florent Ghys

Hello, I am trying to replicate the Crop effect in Adobe Premiere. I have something that works using alphamasks but it seems a little overkill and I'm wondering if there is any optimized way to do this (shaders?).

I'm using four matrices loading four images of a black line (left, right, bottom, top). Matrices are moved using jit.rota and combined with jit.concat. The resulting matrix is sent to a jit.gl.texture and this texture goes to the right inlet of a jit.gl.slab @file cc.alphaglue.jxs. 

Everything works but there is probably an easier and more efficient way to do this, right?

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message

jit.concat

attrui

comment

flonum

prepend

number

qlim

jit.rota

jit.matrix

jit.gl.texture

jit.gl.slab

Hello, I am trying to replicate the Crop effect in Adobe Premiere. I have something that works using alphamasks but it seems a little overkill and I'm wondering if there is any optimized way to do this (shaders?). 

I'm using four matrices loading four images of a black line (left, right, bottom, top). Matrices are moved using jit.rota and combined with jit.concat. The resulting matrix is sent to a jit.gl.texture and this texture goes to the right inlet of a jit.gl.slab @file cc.alphaglue.jxs. 
Everything works but there is probably an easier and more efficient way to do this, right? 

Hello, I am trying to replicate the Crop effect in Adobe Premiere. I have something that works using alphamasks but it seems a little overki

crop-videoplane-1

Hey man, made a video about it:
https://youtu.be/YTMx271sCLU 

That's so clear and simple compared to my clumsy attempts.

i also use rota, concat ´n stuff, probably not not ideal but works for simple jobs.

Crop videoplane