libortp-dev 3.6.1-3build1 (armhf binary) in ubuntu bionic

 This library implements the RFC 1889 (RTP) with a easy to use API with high
 and low level access.
 .
 The main features are:
   - support for multiple profiles, AV profile (RFC 1890) being the default one;
   - an optional packet scheduler for synchronizing RTP recv and send;
   - implements blocking and non blocking IO for RTP sessions;
   - supports multiplexing IO;
   - supports part of RFC 2833 for telephone events over RTP.
 .
 This package contains the development files.