Help with bit pattern

[Joel Reymont]

Folks,

What's the proper way to say this?

<<NBits1:5, Xmin:NBits/signed, Xmax:NBits/signed, Ymin:NBits/signed,  
Ymax:NBits/signed, _:((NBits1 * 4) rem 8), FrameRate:16/little,  
FrameCount:16/little, _/binary>> = X.

I'm getting ** 1: illegal bit size **

	Thanks, Joel

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