pub unsafe extern "C" fn gst_rtsp_message_copy(
msg: *const GstRTSPMessage,
copy: *mut *mut GstRTSPMessage,
) -> GstRTSPResult
pub unsafe extern "C" fn gst_rtsp_message_copy(
msg: *const GstRTSPMessage,
copy: *mut *mut GstRTSPMessage,
) -> GstRTSPResult