[Live-devel] RTSP implementation of Windows Media Player 9

[Laurent Pinchart]

Hi everybody,

I'm trying to stream data (my goal is MJPEG, but any data would do for a 
start) between a custom program (based on the liveMedia library) and Windows 
Media Player 9, which claims to support RTSP.

I tried using testOnDemandRTSPServer and testMP3Streamer, and I've been able 
to receive and play the MP3 stream using VLC (VideoLan Client) and Winamp + 
in_rtp.dll. Unfortunately, WMP9 fails.

Here's the RTSP session trace:

------------------------------------------------------------------------------
accept()ed connection from 172.16.33.16
RTSPClientSession[0x80cf8d8]::incomingRequestHandler1() read 396 bytes:
DESCRIBE rtsp://172.16.33.128:7070/mp3AudioTest RTSP/1.0
User-Agent: WMPlayer/9.0.0.2980 guid/3300AD50-2C39-46C0-AE0A-64FDCF0F0A88
Accept: application/sdp
Accept-Charset: UTF-8, *;q=0.1
X-Accept-Authentication: NTLM, Digest, Basic
Accept-Language: fr-BE, *;q=0.1
CSeq: 1
Supported: com.microsoft.wm.srvppair, com.microsoft.wm.sswitch, 
com.microsoft.wm.eosmsg, com.microsoft.wm.predstrm

parseRequestString() returned cmdName "DESCRIBE", urlPreSuffix "", urlSuffix 
"mp3AudioTest"
sending response: RTSP/1.0 200 OK
CSeq: 1
Date: Tue, Aug 03 2004 16:36:17 GMT
Content-Base: rtsp://172.16.33.128:7070/mp3AudioTest/
Content-Type: application/sdp
Content-Length: 347

v=0
o=- 1091550964778272 1 IN IP4 172.16.33.128
s=Session streamed by "testOnDemandRTSPServer"
i=mp3AudioTest
a=tool:LIVE.COM Streaming Media v2004.07.31
a=type:broadcast
a=control:*
t=0 0
a=x-qt-text-nam:Session streamed by "testOnDemandRTSPServer"
a=x-qt-text-inf:mp3AudioTest
m=audio 0 RTP/AVP 14
c=IN IP4 0.0.0.0
a=control:track1
------------------------------------------------------------------------------

Right after that, WMP9 tries the MMS protocol (testOnDemandRTSPServer gets an 
MMS request, seems that WMP9 doesn't understand that rtsp:// means RTSP and 
not MMS), and eventually fails after a timeout, with the following error 
message:

"Windows Media Player cannot play the file because the specified protocol is 
not supported. In the Open URL dialog, try opening the file using a different 
transport protocol (for example, "http:" or "rtsp:")."

Does anyone have any idea what WMP9 dislikes in the DESCRIBE response ? I 
tried with testMP3Streamer which sets the multicast group IP address in the 
SDP connection data (c=), without any luck.

Any help would be appreciated.

Laurent Pinchart
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