Gets the factor used to compute an approximation of the aspect ratio
of the pixel in the original image. If the value of the field is
not 0, this approximation of the aspect ratio is computed based on
the formula:
Aspect Ratio = (Pixel Aspect Ratio + 15) / 64
The Pixel Aspect Ratio is defined to be the quotient of the pixel's
width over its height. The value range in this field allows
specification of the widest pixel of 4:1 to the tallest pixel of
1:4 in increments of 1/64th.
Declaration Syntax