pub unsafe extern "C" fn gst_rtp_base_payload_set_outcaps(
payload: *mut GstRTPBasePayload,
fieldname: *const c_char,
...
) -> gboolean
pub unsafe extern "C" fn gst_rtp_base_payload_set_outcaps(
payload: *mut GstRTPBasePayload,
fieldname: *const c_char,
...
) -> gboolean