base on The Sipwise media proxy for Kamailio    # What is rtpengine? The [Sipwise](http://www.sipwise.com/) NGCP rtpengine is a proxy for RTP traffic and other UDP based media traffic. It's meant to be used with the [Kamailio SIP proxy](http://www.kamailio.org/) and forms a drop-in replacement for any of the other available RTP and media proxies. Currently the only supported platform is GNU/Linux. ## Mailing List For general questions, discussion, requests for support, and community chat, join our [mailing list](https://rtpengine.com/mailing-list). Please do not use the Github issue tracker for this purpose. ## Features * Media traffic running over either IPv4 or IPv6 * Bridging between IPv4 and IPv6 user agents * Bridging between different IP networks or interfaces * TOS/QoS field setting * Customizable port range * Multi-threaded * Advertising different addresses for operation behind NAT * In-kernel packet forwarding for low-latency and low-CPU performance * Automatic fallback to normal userspace operation if kernel module is unavailable * Support for *Kamailio*'s *rtpproxy* module * Legacy support for old *OpenSER* *mediaproxy* module * HTTP, HTTPS, and WebSocket (WS and WSS) interfaces When used through the *rtpengine* module (or its older counterpart called *rtpproxy-ng*), the following additional features are available: - Full SDP parsing and rewriting - Supports non-standard RTCP ports (RFC 3605) - ICE (RFC 5245) support: + Bridging between ICE-enabled and ICE-unaware user agents + Optionally acting only as additional ICE relay/candidate + Optionally forcing relay of media streams by removing other ICE candidates + Optionally act as an "ICE lite" peer only - SRTP (RFC 3711) support: + Support for SDES (RFC 4568) and DTLS-SRTP (RFC 5764) + AES-CM and AES-F8 ciphers, both in userspace and in kernel + HMAC-SHA1 packet authentication + Bridging between RTP and SRTP user agents + Opportunistic SRTP (RFC 8643) + Legacy non-RFC (dual `m=` line) best-effort SRTP + AES-GCM Authenticated Encryption (AEAD) (RFC 7714) + `a=tls-id` as per RFC 8842 - Support for RTCP profile with feedback extensions (RTP/AVPF, RFC 4585 and 5124) - Arbitrary bridging between any of the supported RTP profiles (RTP/AVP, RTP/AVPF, RTP/SAVP, RTP/SAVPF) - RTP/RTCP multiplexing (RFC 5761) and demultiplexing - Breaking of BUNDLE'd media streams (draft-ietf-mmusic-sdp-bundle-negotiation) - Recording of media streams, decrypted if possible - Transcoding and repacketization - Transcoding between RFC 2833/4733 DTMF event packets and in-band DTMF tones (and vice versa) - Injection of DTMF events or PCM DTMF tones into running audio streams - Playback of pre-recorded streams/announcements - Transcoding between T.38 and PCM (G.711 or other audio codecs) - Silence detection and comfort noise (RFC 3389) payloads * Media forking * Publish/subscribe mechanism for N-to-N media forwarding There is also limited support for *rtpengine* to be used as a drop-in replacement for *Janus* using the native Janus control protocol (see below). *Rtpengine* does not (yet) support: * ZRTP, although ZRTP passes through *rtpengine* just fine ## Documentation Check our general documentation here: * [Read-the-Docs](https://rtpengine.readthedocs.io/en/latest/) For quick access, documentation for usage: * [Compiling and Installing](https://rtpengine.readthedocs.io/en/latest/compiling_and_installing.html) * [Usage](https://rtpengine.readthedocs.io/en/latest/usage.html) * [Transcoding](https://rtpengine.readthedocs.io/en/latest/transcoding.html) * [Call recording](https://rtpengine.readthedocs.io/en/latest/call_recording.html) * [The NG Control Protocol](https://rtpengine.readthedocs.io/en/latest/ng_control_protocol.html) * [The TCP-NG Control Protocol](https://rtpengine.readthedocs.io/en/latest/tcpng_control_protocol.html) * [HTTP/WebSocket support](https://rtpengine.readthedocs.io/en/latest/http_websocket_support.html) * [Janus Interface and Replacement Functionality](https://rtpengine.readthedocs.io/en/latest/janus_interface_and_replacement.html) For quick access, documentation for development: * [Architecture Overview](https://rtpengine.readthedocs.io/en/latest/architecture.html) * [Unit-tests](https://rtpengine.readthedocs.io/en/latest/tests.html) * [Troubleshooting Overview](https://rtpengine.readthedocs.io/en/latest/troubleshooting.html) * [Glossary](https://rtpengine.readthedocs.io/en/latest/glossary.html) ## Sponsors * [Dataport AöR](https://www.dataport.de/) ## Contribution Every bit matters. Join us. Make the rtpengine community stronger. ", Assign "at most 3 tags" to the expected json: {"id":"14457","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"