Given a frame's dimensions and pixel aspect ratio, this function will
calculate the frame's aspect ratio and compare it against a set of
common well-known "standard" aspect ratios.
Parameters
width: number
Width of the video frame
height: number
Height of the video frame
par_n: number
Pixel aspect ratio numerator
par_d: number
Pixel aspect ratio denominator
Returns boolean
true if a known "standard" aspect ratio was recognised, and false otherwise.
Given a frame's dimensions and pixel aspect ratio, this function will calculate the frame's aspect ratio and compare it against a set of common well-known "standard" aspect ratios.