[Live-devel] Axis RTSP Relay

[Bryan Thrasher]

Right, but that requires that the Wowza server have access to the  
camera. The camera is behind a firewall so the only way to connect is  
from the camera to the server.



On Jul 6, 2010, at 12:12 AM, Tom Pepper <tom at silocorp.com> wrote:

> Bryan:
>
> I believe Wowza can actively retrieve a stream via RTP/RTSP - check  
> the wowza forums for documentation on StreamManager and  
> MediaCaster.  You basically define an xml config that references  
> an .sdp and it re-streams on demand or at wowza startup.  The  
> rtplive application is where you want to start.
>
> -t
>
> On Jul 5, 2010, at 7:58 PM, Bryan Thrasher wrote:
>
>> The way the Wowza server works in my usgage is you tell it to pull  
>> a stream
>> from the camera via RTSP.  The M1011 only allow MPEG4 and H.264  
>> over RTSP
>> (maybe that's an RTSP specification).  The camera produces the h.264
>> Baseline level 3 which is packaged up in a playlist for the  
>> iPhone.  But the
>> underlying stream format must be iPhone compatible because Wowza  
>> does not do
>> any transcoding.
>>
>> The Wowza server can also listen for rtsp connections from encoders  
>> like
>> VLC.
>>
>> The crux of my issue is that the Axis camera cannot initiate the  
>> connection
>> to the Wowza server.  It can only listen as a server.  So what I am  
>> trying
>> to accomplish is loading some software on the camera that will  
>> initiate an
>> rtsp connection to Wowza and send the output from the encoder that  
>> is built
>> into the camera, or hand off to Wowza to let it start pulling it.
>>
>> I saw somewhere on the openRTSP pages that you can initiate a  
>> connection
>> with openRTSP and then have another program handle the actual  
>> streaming
>> data.  I have extremely limited knowledge of RTSP.  But, would it be
>> possible for openRTSP or even a shell script running on the camera to
>> initiate the RTSP connection and let Wowza take over the interaction?
>> Theoretically, can you speculate on what that RTSP "exchange" would  
>> look
>> like?  I could take that and pose it to the Wowza developers to see  
>> if they
>> can work with it.
>>
>> Thanks for your help!
>>
>> -----Original Message-----
>> From: live-devel-bounces at ns.live555.com
>> [mailto:live-devel-bounces at ns.live555.com] On Behalf Of Ross  
>> Finlayson
>> Sent: Monday, July 05, 2010 10:17 PM
>> To: LIVE555 Streaming Media - development & use
>> Subject: Re: [Live-devel] Axis RTSP Relay
>>
>>> What I would like to do is both of the following:
>>> 1)      Run a program on the M1011 that will "restream" to the Wowza
>>> Server acting as a client.
>>> a.       It will either pull directly from the h.264 encoder or from
>>> the rtsp server built into the camera and send to Wowza.
>>> b.      It would need to initiate the connection to Wowza on start  
>>> up
>>> c.       It would need to recover the connection if it dropped.
>>> 2)      Run a program on a Linux PC on the same network as the  
>>> cameras.
>>> a.       It will pull from each camera and send to Wowza.
>>> b.      It would also record the streams.
>>> c.       It would need to have some sort of way to send recordings
>>> to the Wowza server on-demand.  Maybe there would be a program that
>>> would poll the server every so often looking to see if a recording
>>> was needed.
>>>
>>> It seems like a combination of LIVE555 Media Server and openRTSP
>>> could work assuming they can be wired together, sort of in reverse.
>>
>> I don't know what protocol(s) the 'Wowza' server uses to receive
>> incoming streams (that it then re-streams to clients, as a server),
>> but if it uses the same protocol that Apple 'Darwin Streaming Server'
>> uses, then you may be able to use our "DarwinInjector" class.
>>
>> (For two example applications that use this class, see the code for
>> "testMPEG1or2AudioVideoToDarwin" and "testMPEG4VideoToDarwin")
>>
>>
>>> It may also make sense to use LIVE555 Media Server instead of
>>> Wowza.  Can it stream to iPhone?
>>
>> Not at present, because the iPhone doesn't use RTSP/RTP.  Instead, it
>> uses Apple's "HTTP live streaming protocol".  I have thought about
>> possibly supporting this as an option in our server, but right now
>> it's just a thought (there are so many other things on my plate).
>> -- 
>>
>> Ross Finlayson
>> Live Networks, Inc.
>> http://www.live555.com/
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>>
>>
>>
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