pub unsafe extern "C" fn av_gcd_q(
a: AVRational,
b: AVRational,
max_den: c_int,
def: AVRational
) -> AVRational
pub unsafe extern "C" fn av_gcd_q(
a: AVRational,
b: AVRational,
max_den: c_int,
def: AVRational
) -> AVRational