Function gstreamer_video_sys::gst_buffer_add_video_afd_meta

pub unsafe extern "C" fn gst_buffer_add_video_afd_meta(
    buffer: *mut GstBuffer, 
    field: u8, 
    spec: GstVideoAFDSpec, 
    afd: GstVideoAFDValue
) -> *mut GstVideoAFDMeta

This is supported on crate feature v1_18 only.