The latest version (2020.02.11) of the “LIVE555 Streaming Media” code adds
support for receiving SRTP (encrypted) RTSP streams. Currently only a few RTSP
servers support SRTP. Our current RTSP client code is known to support two of
them: The Axis and Bosch network cameras. [1]
(If you manufacture a network camera (or other RTSP server) that supports
streaming SRTP, but which our RTSP client code does not yet handle, then please
let us know, and we might be able to update our code to support it.)
Note that this support for SRTP is currently only for RTSP *clients*. Our RTSP
server implementation does not currently support streaming (outgoing) SRTP.
However, the "LIVE555 Proxy Server" can now be used to proxy back-end SRTP
streams. (The front-end streams will be regular RTP.)
As usual, if you don't have the "openssl" library, you can compile the code by
specifying
-DNO_OPENSSL=1
on the command line. (If you do this, you won't be able to connect to RTSP
servers over TLS, nor access SRTP streams.)
Many thanks to Thales Group for sponsoring this work.
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
[1] These cameras support SRTP only when the RTSP connection to the camera is
over a TLS connection (something that our RTSP client code has supported since
early December 2019). The URLs that specify this differ depending on the
camera type. Axis cameras use "rtsp://" URLs with a port number of 322. Bosch
cameras use a "rtsps://" URL with a port number of 9554, with the URL ending
with "/srtp=1" (meaning: the server chooses the SRTP master key) or "/srtp=2"
(meaning: the client chooses the SRTP master key).
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