the number to scale
the numerator of the scale ratio
the denominator of the scale ratio
val * num / denom. In the case of an overflow, this function returns G_MAXUINT64. If the result is not exactly representable as an integer, it is rounded to the nearest integer (half-way cases are rounded up). See also gst.global.utilUint64Scale, gst.global.utilUint64ScaleCeil, gst.global.utilUint64ScaleInt, gst.global.utilUint64ScaleIntRound, gst.global.utilUint64ScaleIntCeil.
Scale val by the rational number num / denom, avoiding overflows and underflows and without loss of precision.
This function can potentially be very slow if val and num are both greater than G_MAXUINT32.