/usr/include/crtmpserver/thelib/protocols/rtp/ is in crtmpserver-dev 1.0~dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/crtmpserver/thelib/protocols/rtp/basertpappprotocolhandler.h
/usr/include/crtmpserver/thelib/protocols/rtp/basertspappprotocolhandler.h
/usr/include/crtmpserver/thelib/protocols/rtp/connectivity/
/usr/include/crtmpserver/thelib/protocols/rtp/connectivity/baseconnectivity.h
/usr/include/crtmpserver/thelib/protocols/rtp/connectivity/inboundconnectivity.h
/usr/include/crtmpserver/thelib/protocols/rtp/connectivity/outboundconnectivity.h
/usr/include/crtmpserver/thelib/protocols/rtp/inboundrtpprotocol.h
/usr/include/crtmpserver/thelib/protocols/rtp/nattraversalprotocol.h
/usr/include/crtmpserver/thelib/protocols/rtp/rtcpprotocol.h
/usr/include/crtmpserver/thelib/protocols/rtp/rtpheader.h
/usr/include/crtmpserver/thelib/protocols/rtp/rtspprotocol.h
/usr/include/crtmpserver/thelib/protocols/rtp/sdp.h
/usr/include/crtmpserver/thelib/protocols/rtp/streaming/
/usr/include/crtmpserver/thelib/protocols/rtp/streaming/baseoutnetrtpudpstream.h
/usr/include/crtmpserver/thelib/protocols/rtp/streaming/innetrtpstream.h
/usr/include/crtmpserver/thelib/protocols/rtp/streaming/outnetrtpudph264stream.h