humble-video-noarch/src/main/java/io/humble/video/Rational.java
public static Rational sSubtract(Rational a, Rational b) {
    long cPtr = VideoJNI.Rational_sSubtract(Rational.getCPtr(a), a, Rational.getCPtr(b), b);
    return (cPtr == 0) ? null : new Rational(cPtr, false);
  }
public static Rational sSubtract(Rational a, Rational b) {
    long cPtr = VideoJNI.Rational_sSubtract(Rational.getCPtr(a), a, Rational.getCPtr(b), b);
    return (cPtr == 0) ? null : new Rational(cPtr, false);
  }
Subtracts a from b.<br>
@param a The first number.<br>
b The second number.<br>
@return a-b.