This question has already been asked 2011, but has not been answered. https://osqa-ask.wireshark.org/questions/3523/why-isnt-rtp-showing-up/
The problem still exists. An RTP stream seems only been found when it is complete captchered. When the captchering begins after the stream has been established, Wireshark seems not to find it. Why?
What must be done to find an RTP stream that definitely exists?
Thanks for any hint.