[Live-devel] Recording time available?

[Ross Finlayson]

> I've built a RTSP client using your library, so my question is related to what information that is passed from the server to the client. When I stream an archive file (i.e. non-live) from a RTSP-server ("Cisco Video Surveillance Media Server" in this case) it would great to be able to get a timestamp indicating when it was recorded. For live streams such a field would of course be the current server time. Is there any other timestamp available at all besides presentation time?
> 
> 

No.  (And even the presentation time should be considered, by the client, to be only a 'relative' time stamp - not an absolute time in any time scale.)

However, depending upon the specific codec(s) that you are using, it *might* be possible to embed extra information (such as a different kind of timestamp) within the encoded media itself (i.e., invisible to RTP or our software).

Plus, of course, the server could put (static, one-time) information into the stream's SDP description (e.g., the "i=" or "s=" lines).  if so, then this information would be available to your client.

But in either case, this depends upon whatever the server decides to do.


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

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