[MPlayer-users] Trouble with RTSP stream; works with Quicktime and VLC

[Aaron Greenhouse]

I'm having trouble getting MPlayer to open a stream via RTSP.  The  
stream is hosted by an AXIS camera on the LAN.  It is MPEG-4 video  
with AAC audio.  It's url on the LAN is rtsp://192.168.23.200/mpeg4/1/ 
media.amp.  When I give this URL to Quicktime or VLC, the stream is  
opened and plays correctly.  If I give it to MPlayer, the following  
happens:

<begin quote>
[aaron-greenhouses-imac:~] aaron% mplayer http://192.168.23.200/ 
mpeg4/1/media.amp
MPlayer dev-SVN-r21482-4.0.1 (C) 2000-2006 MPlayer Team
CPU: Intel(R) Core(TM)2 CPU         T7400  @ 2.16GHz (Family: 6,  
Model: 15, Stepping: 6)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

Playing http://192.168.23.200/mpeg4/1/media.amp.
Resolving 192.168.23.200 for AF_INET6...
Couldn't resolve name for AF_INET6: 192.168.23.200
Connecting to server 192.168.23.200[192.168.23.200]: 80...
Cache size set to 320 KBytes
Cache fill:  0.01% (26 bytes)
Win32 LoadLibrary failed to load: avisynth.dll, /usr/local/lib/codecs/ 
avisynth.dll, /usr/lib/win32/avisynth.dll, /usr/local/lib/win32/ 
avisynth.dll


Exiting... (End of file)
[aaron-greenhouses-imac:~] aaron%
<end quote>

I saw an earlier message on the list about avisynth that suggested  
that in this case I should try the -playlist option.  I tried that,  
and it doesn't help either.

I tried to dump the stream anyway using -dumpstream -dumpfile, and it  
turns out the contents of the stream are "No session ID specified."

(This is on an Intel iMac running OS X 10.4.10.)

What am I doing wrong?

--Aaron