Hi,
I am attempting to stream AAC audio (from an encoder) using live555 libraries 
through a Darwin Streaming Server.

I think I have configured everything properly, but I get the error 
'MPEG4GenericRTPSource Warning: Unknown or unsupported "mode":(null)'. when 
attempting to stream the audio. My understanding is that the "mode" variable in 
MPEG4GenericRTPSource is set on creation, and the only place I see it created 
is from within the MediaSubsession creation, where fMode is passed to the new 
MPEG4GenericRTPSource. Unfortunately, I don't see any way to initialize fMode 
without using an SDP file, which is counter to what we are attempting to do 
with Darwin.

What method should be used to set this variable? Can I do it on initialization 
of the SimpleRTPSink? My audio RTP sink is set up as follows (in a larger 
context, this is a modification of the testMPEG4VideoToDarwin example):

audioSink = SimpleRTPSink::createNew(*env, &rtpGroupsockAudio, 97, 44100, 
"audio", "mpeg4-generic", 2);

Thanks,
-Tyler
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