SRT (Secure Reliable Transport)

SRT (Secure Reliable Transport) is an open-source protocol, developed by Haivision and maintained by the SRT Alliance, for delivering broadcast-quality video and audio reliably over unpredictable public internet connections. It runs over UDP and uses automatic retransmission (ARQ) to recover lost packets, holding incoming data in a configurable latency buffer, commonly 0.5 to 2 seconds, that represents a fixed delay it adds to the signal path. SRT has largely replaced satellite and legacy circuits for live contribution feeds. For real-time audio work, that latency buffer is a fixed part of the overall latency budget, and separation or cleanup typically happens downstream once the stream has been received and decoded.