[Live-devel] Patch to liveMedia for Consideration

[Ross Finlayson]

>Attached is a patch file to liveMedia that I would like to submit 
>for consideration. It allows liveMedia to initiate an RTSP session 
>on an nCUBE/C-COR video server.  The code that was added is similar 
>to the code currently in place for Kasenna and Microsoft.

Thanks for the submission.  Unfortunately, however, I'm getting 
increasingly reluctant to keep adding ugly hacks to the RTSP client 
code in order to support all sorts of different weird, non-standard 
servers.  (I realize that - for historical reasons - we already have 
ugly code there to support Kasenna servers; however, I'd like to 
remove this at some point in the future (as these broken old Kasenna 
servers fade into irrelevance).)

Our installed base (in VLC, MPlayer, and other RTSP clients) is now 
sufficiently large (far larger than the installed base of any 
particular RTSP server implementation) that I believe it's now 
reasonable and appropriate for us to put pressure on these server 
implementors to clean up their implementations to make them more 
compliant with standards, and with other existing implementations.

With this in mind, rather than add your patch to the code, I ask that 
the implementors of the "nCUBE/C-COR" video server make the following 
three simple changes to their implementation.  If they do this, their 
server should - I believe - work with the existing "LIVE555 Streaming 
Media" RTSP client implementation - and the large existing installed 
base of VLC (and MPlayer etc.) clients:

1/ Change the SDP description returned in response to a RTSP 
"DESCRIBE" command to say
	RAW/RAW/UDP
   instead of
	RTP/AVP
   (reporting "RTP/AVP" is very wrong, because the server is quite 
clearly *not* sending RTP)

2/ Accept "RAW/RAW/UDP" in the "Transport:" header of RTSP "SETUP" 
commands (rather than requiring that the string "MP2T/DVBC/UDP" be 
used).

3/ Make whatever (presumably minor) fixes are necessary to the server 
so that you don't need to modify the existing implementation of the 
"constructSubsessionURL()" command.
-- 

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