Reading YUV raw from memory

Hello,

I'm stuck in trying to read raw YUV or RGB image from memory to
GraphicsMagick usin MagickWand API.
What i want to do is something like this (using Python ctypes wrappers, but
they should be trivial):

w = NewMagickWand()
MagickSetImageSize(640, 480)
MagickSetImageFormat(w, "RGB")
MagickSetImageDepth(w, 8)
MagickSetImagePixels(w, 0, 0, 640, 480, "RGB", 0, ptrToData)

What am i doing wrong? All help appriciated greatly!

--Teemu Keinonen

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