Function x264_dev::sys::x264_param_default_preset

pub unsafe fn x264_param_default_preset(
    arg1: *mut X264ParamT, 
    preset: *const c_char, 
    tune: *const c_char
) -> c_int

Multiple tunings can be used if separated by a delimiter in ",./-+", however multiple psy tunings cannot be used.

film, animation, grain, stillimage, psnr, and ssim are psy tunings.

returns 0 on success, negative on failure (e.g. invalid preset/tune name).