satipclient on VTi seems to support RTSP 554 only

[weidi]

I try to get following setup running

DVB-S2 card -> tvheadend -> SatIP -> VU+ zero

The default config on tvheadend is RTSP Port 9983 but SAT>IP Client on VTI is not working.
There are different workarounds available out there but all of them are more or less practical so might be great if you can implement another port then 554.

Other related posts:
https://vuplus-support.org/wbb4/index.php?thread/116318-port-f%C3%BCr-iptv-%C3%A4ndern/&postID=1644140&highlight=9983#post1644140
https://www.opena.tv/vu-zero/38125-zero-als-sat-ip-client-und-tvheadend-als-sat-ip-server-looft-nicht.html