Why can't one play unicast just from a SDP description? From a
previous message:
Ross Finlayson finlayson at live555.com
Wed Oct 1 03:04:23 PDT 2008
You can't (in general) play a unicast stream just by reading a
SDP description, because the SDP description does not, by
itself, contain enough information about the stream endpoints.
What's that missing information?
The client's port numbers.
In detail: I want to transmit live captured unicast audio/video, and
I'm trying using testMP3Streamer and ffmpeg freely running,
independently (without establishing sessions because I know my clients
beforehand,) then clients would use VLC with a SDP file.
That's not working. I'm able to play the audio/video independently,
it's just concurrently that fails. Is an RTSP server necessary?
In general, yes, if you are streaming via unicast.
We implemented our RTSP server for a reason. If you want to stream
via unicast without using a RTSP server, then you might (perhaps) be
able to get this to work, but you will get no support from me.
--
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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