RTSP UDP port issue with VLC player

[qussungtn]

Dear all,

I am struggling with RTSP streaming over UDP in vlc player.
the default port for RTSP server is 554.

I set the RTSP port number as 554 in the server side.
and the URL for the RTSP streaming I set was " rtsp://192.168.1.30:554". I definitely defined the port number(554).

I checked the source(server) port of IP camera via wireshark and found out that the port number is not 554 but some random numbers.
But I could view RTSP streaming over UDP.

It is really weird how VLC player can stream this RSTP streaming over UDP with wrong port number.

I need your advice on this issue

Best regards.