[Live-devel] User Private Data Streams via RTSP?

[Bill Dolson]

Hi Ross,

What are the prospects for being able to employ Live555/RTSP to send 
user private data streams in addition to audio and video?  I realize 
zero with the current implementation, I mean via additional development.

We have Mpeg-2 Transport Streams which contain video, audio, and user 
private data (PES packets containing private data stream_type=6) under 
their own PID.  This data contains camera geospatial positioning and 
pointing data and conforms to an NGA/MISB standard.

I have studied the RTSP RFC (2326) as well as the SDP RFC (4566) and 
note with dismay that "control" and "data" are deprecated media types.

How bad a hack do you estimate it would be to add support for our 
private data streams in your RTSP server and client?  The private data 
PES packets typically appear at 10Hz or frame rate, sometimes slower. 
They are typically only a few hundred bytes in length.

I would note that I have hacked both VLC and FFmpeg to support these 
types of elementary streams and we are able to stream them as simple UDP 
streams but this has its obvious limitations.  A more robust and 
flexible solution like RTSP would be preferable.

Is this anything you would consider taking on on a consulting basis?

Thanks,
Bill Dolson
RIS, Inc.