CODEWITHSUNDEEP
rtsprtp
BBridges
BBridges

Reputation: 130

RTSP and RTP for streaming from an IP Camera

I have a simple application in c# that opens an RTSP session and sends the appropriate commands like DESCRIBE, SETUP, etc to control an RTP data stream.

My questions is this: does the TCP session (for the RTSP communication) have to stay open while streaming the data over RTP? Without going into details as to why, I'd like to be able to close the RTSP session after the RTP streaming is setup.

Upvotes: 0

Views: 3535

Answers (2)

eschmid
eschmid

Reputation: 32

The short answer is yes you must keep the rtsp socket open.

If the stream is over TCP the RTP packet travels over the socket of the RTSP session. If the stream is over UDP the socket is used by the server to know if it should keep sending packet to the client because the UDP packet transmission does not have any feedback if the client is still alive.

Edited:

I think the answer marked correct is actually incorrect. In general, the cameras implement the RTSP protocol version 1 not version 2. In the 10 years that I have of experience in video surveillance systems I have found that several models of cameras stop sending RTP packets after closing the RTSP session socket .

Upvotes: 0

rkosegi
rkosegi

Reputation: 14678

RFC 7826 Real-Time Streaming Protocol Version 2.0

A persistent connection is RECOMMENDED to be used for all
transactions between the server and client, including messages for
multiple RTSP sessions. However, a persistent connection MAY be
closed after a few message exchanges. For example, a client may use
a persistent connection for the initial SETUP and PLAY message
exchanges in a session and then close the connection. Later, when
the client wishes to send a new request, such as a PAUSE for the
session, a new connection would be opened. This connection may be
either transient or persistent.

So no, it is not required to be open while streaming data.

Upvotes: 2

Related Questions