Something like this, and then tinker with the exp value:
Code:
loadplugin("C:\Users\tin2tin\Desktop\Fotos 60D\fusion.dll")
loadplugin("C:\Program Files\DVD slideshow GUI\FFmpegSource\ffms2.dll")
import("C:\Program Files\DVD slideshow GUI\FFmpegSource\ffms2.avs")
v=ffmpegSource2("C:\Users\tin2tin\Desktop\Fotos 60D\MVI_3769.MOV").converttorgb32()
a=selecteven(v)
b=selectodd(v)
fuse(a,b,fusemask(a,b,exp=0.5))
I've noticed that my 60D sometimes starts with the underexposed image and sometimes with the overexposed image, so you'll have to swap the a and b values.