Function gstreamer_sys::gst_event_parse_instant_rate_sync_time

pub unsafe extern "C" fn gst_event_parse_instant_rate_sync_time(
    event: *mut GstEvent, 
    rate_multiplier: *mut c_double, 
    running_time: *mut GstClockTime, 
    upstream_running_time: *mut GstClockTime
)

This is supported on crate feature v1_18 only.