gstreamer-rtsp-server-1.0.vapi is out of date
Looks like vala-girs/blob/master/gir-1.0/GstRtspServer-1.0.gir was last updated in 2014. There have been a few new symbols added since then like gst_rtsp_media_factory_set_transport_mode
Looks like vala-girs/blob/master/gir-1.0/GstRtspServer-1.0.gir was last updated in 2014. There have been a few new symbols added since then like gst_rtsp_media_factory_set_transport_mode