function PointConvertToYUY2(clip input, bool "silent", bool "subwarn") {

silent  = Default(silent, false)  # stfu and convert anyway if input isn't YV12
subwarn = Default(subwarn, false) # Display warning on the video instead of throwing an error

input.GreyScale()
y1 = last

try {
input.UToY()
u1 = last

input.VToY()
v1 = last
}

catch(err_msg) {
input.ConvertToYV12.UToY()
u1 = last

input.ConvertToYV12.VToY()
v1 = last
}

y1
ConvertToYUY2()
y2 = last


u1.PointResize(u1.width, u1.height*2)
ConvertToYUY2()
u2 = last

v1.PointResize(v1.width, v1.height*2)
ConvertToYUY2()
v2 = last


YToUV(u2, v2, y2)
output1 = last

input.ConvertToYUY2()
output2 = last

output2.Subtitle("Warning! input isn't YV12!")
subtitled = last

quiet = output2

verbose = subwarn ? subtitled : output1
silent ? Nop() : subwarn ? Nop() : Assert(input.IsYV12(), "What's the use of pointresizing \
chroma if input isn't YV12, f00")

return silent ? quiet : verbose

}

function PointConvertToYV12(clip input, bool "silent") {
silent = Default(silent, false) # stfu and convert anyway if input is YV12

input.BilinearResize(input.width*2, input.height*2)
ConvertToYV12()
big = last

input.ConvertToYV12().GreyScale()
y = last

big.UToY()
PointResize(input.width/2, input.height/2)
u = last

big.VToY()
PointResize(input.width/2, input.height/2)
v = last

YToUV(u, v, y)
converted = last

isnotyv12 = input.IsYV12() ? false : true

silent ? Assert(isnotyv12, "Input is YV12, you're doing a useless conversion. Set silent=true \
to get rid of this msg.") : nop()

return converted

}