RTMP vs. SRT vs. WebRTC: Choosing the Right Live Streaming Ingest Protocol

Additional Context

The push for modern ingest standards reached a milestone in March 2025 when the Internet Engineering Task Force (IETF) officially published the WebRTC-HTTP Ingestion Protocol (WHIP) as RFC 9725. This standardization addresses the fragmentation that previously plagued WebRTC, where the lack of a uniform signaling mechanism forced developers to build proprietary handshake solutions. Per IETF documentation, WHIP provides an HTTP-based signaling layer that allows any compliant encoder—including OBS Studio, which added native WHIP support in version 30—to push video to a media server with the same simplicity as an RTMP stream key. Simultaneously, the SRT protocol has seen dominant adoption in professional broadcast contribution. According to Haivision’s 2024 Broadcast Transformation Report, which surveyed over 800 professionals, 68% of respondents selected SRT as their top protocol of choice, surpassing RTMP at 56%. This shift is largely driven by the SRT Alliance, which has grown to over 600 members, including major vendors such as Sony and Harmonic. While SRT is favored for reliable 'first-mile' contribution from remote sites to a master control, WebRTC remains the leader for 'last-mile' delivery in ultra-low latency scenarios. Despite the rise of these newer protocols, RTMP's legacy install base remains significant. Recent reporting from Medium (May 2025) suggests that while high-end interactive platforms are migrating to WHIP and emerging QUIC-based protocols like Media over QUIC (MoQ), RTMP will likely persist for years in non-interactive broadcast-to-VOD workflows. This persistence is due to the massive global inventory of hardware encoders and consumer-grade software that do not yet support the UDP-based complexity of SRT or WebRTC.