4:3(1.33:1) to 16:9 question

[thegame]

OK if I wanted to manually convert some of my 4:3(1.33:1) video to 16:9 widescreen how much would I need to crop off the 4:3 image to get 1.78:1,1.85:1,2.35:1,etc.

Thanks

[Soulhunter]

http://soulhunter.razorbb.net/misc/Calc.png

Common, it's not that hard... ;P

[thegame]

Jeez,thanks a lot,if it was that easy I would not have asked the question,I have NO idea what the formula's are and what to do with them.

again thanks you were a terrific help.

[MatLz]

Hi! If you use avisynth:function MangleTheOriginalAspectRatioOfMyVideos(clip input, float ar)
{
input
w=width()
h=height()
oar=w/float(h)
tb=(oar<ar) ? (round(h-(w/ar))/2) : 0
lr=(oar>ar) ? (round(w-(h*ar))/2) : 0
converttoyv12(crop(converttorgb(),lr,tb,-lr,-tb))
}If not, SoulHunter suggested you the most powerfull application in all Windows!:D
If you want to do it manually for your need (only crop 4/3 to superior AR), use only the first formula (tb)