[AG-DEV] Getting more than one service stream

[Derek Piper]

	Hi Thomas,

	Thanks for getting back with me. I see what you mean about connecting 
to the venue and getting the information that way. I have a few thoughts 
on that:

- If the participants move venue, we have to manually go and change the 
recorder, unless there's a 'follow participant' thing?

- Very good point you make about obtaining the entire list of streams. I 
certainly would want to have the mlb and screenstreamer entries for 
example, and whatever else comes along the way. It's probably not 
possible to do that from a service I'm guessing.

- Is it possible to get the encryption key from this venue client 
method? it's not displayed in the venue client 'properties' (even though 
it is in VIC/RAT etc.)

	My reason for the service idea was this:

- AGVCRService can come up automatically when a venue is loaded, get its 
services and call the AGVCR executable with the relevant options

- Here's the good part (so far this is theory). The called AGVCR gets 
some flag that makes it check for an already running instance of AGVCR 
(not done yet, have to figure that out) and then examines its arguments 
and instead of initializing itself it just sends re-configuration 
commands to the already running AGVCR (this is doable possible, since 
the remote control stuff already exists in AGVCR)

- With the addition of a 'status' command for feedback from the running 
AGVCR the configuring AGVCR (spawned from the service script) can see if 
the original was recording/playing whatever. If so, then it sends the 
appropriate command to re-initiate the recording in a subsequent file to 
what is already in use (i.e. file-2). All commands from the buttons in 
AGVCR can be

- Thus the recording 'follows' the participants, accounting for 
bridged/non-bridged encrypted/non-encrypted venues as needed.


	So, I'm not entirely sure on the direction to go in.

	Derek

Thomas D. Uram wrote:
> Hi Derek:
> 
> You should find that the ConfigureStream method is called for each
> stream.  Given that your service needs access to each of these streams,
> you would have to collect them as they come in.  The default behavior
> of services is to expect a single stream, so only one is stored; your
> service would be a specialization of this behavior.
> 
> An alternative, which I think I'd prefer, is that the recorder be 
> integrated
> as a stand-alone application instead of a service.  It could, on 
> command, find the running
> VenueClient (see bin/GoToVenue.py for details) and make SOAP calls to
> it to get the list of streams, or even the venue URL if you wanted to 
> make calls
> directly there.  You might want to do the latter, because the venue 
> client's
> list of streams is dependent on services that the user has installed, so 
> the
> streams you get from it may be a subjective subset of those in the venue.
> 
> I've been wanting to talk with you about integration of agvcr.  I'm glad 
> to see
> you're doing it.
> 
> Tom
> 
> 
> On 1/13/06 8:19 AM, Derek Piper wrote:
> 
>>
>>     Hi,
>>
>>     I'm trying to write a service script (for 2.3 or 2.4) for passing 
>> parameters to AGVCR, to make it simple for people to use. I've started 
>> hacking at a service script but I need some help in trying to use the 
>> details of the service structure.
>>     I need to be able to get all the info that is in the venue client 
>> 'properties' dialog.
>>
>> i.e.
>> stream type name (i.e. audio, video, mlb, screenstreamer)
>> host/port/ttl
>>
>>     I see how to get the encryption key, so that's not a problem. My 
>> problem is that I don't see how to reference more than one stream. I see
>> self.streamDescription.location.host, but that only indicates one. 
>> I've added capabilities for audio and video, both consumer and 
>> producer, but it's not apparent how to get those streams' 
>> configuration. I'm also missing the 'type' field too, I don't know if 
>> it's self.streamDescription.location.type ? or something else.
>>
>>     Help would be appreciated.
>>
>>     Thanks,
>>
>>     Derek
>>
> 

-- 
Derek Piper - dcpiper at indiana.edu - (812) 856 0111
IRI 323, School of Informatics
Indiana University, Bloomington, Indiana