libortp16 1:5.1.64-2 (armhf binary) in ubuntu lunar

 This library implements RFC 3550 (RTP) and offers an easy to
 use API with high-level and low-level access. It is part of
 Linphone.
 .
 The main features are support for multiple profiles (AV profile
 RFC 3551 being the default one); an optional packet scheduler
 for synchronizing RTP recv and send; blocking or non-blocking
 IO for RTP sessions; multiplexed IO; some of RFC 4733 for
 telephone events over RTP.