I'd like to develop module for Kamailio which will be working with RTP/RTCP packets. Is there any way to capture and edit RTP packet in module of Kamailio for example in module extended from topoh?

In topoh there are two events SREV_NET_DATA_IN and SREV_NET_DATA_OUT but I didn't be able to capture any RTP packets by them.

Thanks in advance for any help or useful information.