> On Mar 25, 2022, at 11:33 PM, stevee <[email protected]> wrote:
>
> Hello, I have been looking at and compiling the test apps for a few days and
> trying to work out the general structure of the libraries.
>
> I am wishing to look at the video stream bytes from an IP camera in order to
> generate some statistics on it. I have compiled the test proxy which works
> just great at forwarding the RTSP stream to a player.
You should first ask if you really want to be watching a stream while you’re
collecting stats on it. If not, then you can probably do what you want by
running just a RTSP client rather than a RTSP proxy server. In particular, you
could run “openRTSP”, using the “-Q” option; see
http://www.live555.com/openRTSP/
> My main issue is working out what strategy I should be using to get to the
> sink bytes but essentially I keep running into the problems whereby whatever
> class I override needs private members of base classes to access the data. I
> think its just my unfamiliarity with the library and RTSP in general.
>
> I have overridden the proxy's transcoding table and trying to insert a new
> overridden FramedFilter so that I could call getNextFrame and handle the
> doGetNextFrame by simply passing the data along.
This would be the simplest way, as this (the transcoding table) was the
mechanism by which I intended the “LIVE555 Proxy Server” to be customized to
allow the incoming media (from a back-end server) to be ‘processed’ before
being re-transmitted to front-end clients. In this case, however, the
‘processing’ would just be to collect statistics, not to actually ’transcode’
the data. And, as you noted, this would be codec specific; you’d need to do
the same thing for each codec that you’re interested in.
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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