RTMP vs SRT vs WHIP: Live Ingest Protocols Compared

RTMP, SRT, and WHIP address different live-stream ingest needs: RTMP or RTMPS remains widely supported by social platforms and works well on stable uplinks, SRT is designed for lossy public or cellular networks through configurable UDP retransmission windows, and WHIP provides standardized WebRTC ingest for browsers, OBS, and real-time media rooms. WHIP, defined by IETF RFC 9725 in 2025, uses HTTP for session setup and mandatory DTLS-SRTP encryption, while SRT’s specification remains an expired Internet-Draft and its optional AES encryption requires a shared passphrase. RTMP relies on TCP reliability, which can delay later media after packet loss, although Enhanced RTMP expands codec support when both sender and receiver implement it. When sources and destinations use different protocols, a gateway can receive RTMP, SRT, or RTSP camera feeds and republish them as WHIP, sometimes requiring transcoding to WebRTC-compatible H.264 and Opus. VideoSDK positions WebRTC rooms as an ingest hub through WHIP, offers RTMP for restreaming to services such as YouTube and Twitch, and requires gateways for RTMP or SRT sources until direct ingest support is documented.

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