[Live-devel] RTP URL question

[Ross Finlayson]

> I have a quick question. I’m looking to add the capability of adding an RTP stream that is specified only by a URL of the form “rtp://<ip>:<port>” This is an add on to an existing video widget. I have also seen examples where people specify the URL as “rtp://@<ip>:<port>”
>  
> Is this possible with Live555?

No, because this type of URL (which has never been standardized) doesn't give you enough information about the stream.  In particular, it doesn't tell you the RTP payload format (i.e., the data type) of the stream.  Also, specifying only one port number isn't enough, because to properly receive a RTP stream, you need to know not just the stream's destination RTP port, but also the RTCP port on which the sender should receive RTCP "RR" packets back from the receiver.

Instead, the best way to receive a stream is to use the RTSP protocol (i.e., a "rtsp://" URL).  This protocol gives the client all of the information that it needs to receive the stream.


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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