gortsplib

Provides both client and server functionalities with support for secure variants like RTSPS and SRTP, as outlined in the protocol features, ensuring comprehensive coverage for streaming applications.

Handles a wide range of video and audio formats including modern codecs like AV1 and Opus, with built-in encoders and decoders for many, per the RTP payload formats table.

Core of the popular MediaMTX media server, indicating it's battle-tested in real-world streaming applications and trusted for production use.

Includes capabilities like pause/seek without disconnect and ONVIF back channels, enhancing usability for complex real-time streaming scenarios, as detailed in the features list.