[AG-TECH] can vic take pre-encoded video as input?

Piers O'Hanlon p.ohanlon at cs.ucl.ac.uk
Wed Nov 26 09:41:33 CST 2008


gurcharan,

It depends on the source of the RTP but - say it's coming from some
streamer system then you point the RTP at a machine on which you run
rtptrans (or VLC) and configure it to retransmit the RTP to the
multicast address for the AG session. The video should then show up in
AG VIC - provided VIC can decode it.
http://www.cs.columbia.edu/irt/software/rtptools/

e.g. ./rtptrans stream_host/streamer_port AG_rm_mcast_addr/AG_rm_port

Piers

2008/11/26 Gurcharan S. Khanna <gurcharan.khanna at rit.edu>:
> Piers,
>
> What I'm aiming for is vic taking input from one of these rtp sources and
> rendering
> it in an AG environment. Vic reads various hardware inputs and can even grab
> the display screen but I want to take one of these rtp sources and have it
> appear
> alongside all the other vic streams in a normal AG session. That's what I
> don't know
> is possible or how difficult it would be to code.
>
> thanks,
>
> -gurcharan
>
> Piers O'Hanlon wrote:
>>
>> Hi gurcharan,
>>
>> If you have unicast RTP streams that you want to retransmit as
>> multicast then you could use something like rtptrans from the
>> rtptools. If you have HTTP streams then they will need to be
>> repacketised which is something VIC isn't capable of doing - you may
>> be able to use VLC . RTSP is a control protocol and doesn't actually
>> transport the streams - usually the streams are transported using RTP,
>> HTTP, etc. However VLC also has support for RTSP and it may be
>> possible to use it to transcode/redirect RTSP sessions:
>> http://wiki.videolan.org/Documentation:Streaming_HowTo
>>
>> Piers.
>>
>> 2008/11/26 Gurcharan S. Khanna <gskpop at cis.rit.edu>:
>>
>>>
>>> hi,
>>>
>>> i was just curious how hard it would be for vic to take as input video
>>> streams coming
>>> from elsewhere, such as rtp, rtsp, http streams. would it be possible,
>>> technically, to
>>> create a filter/connector that would perform this function? essentially,
>>> it
>>> wouldn't
>>> necessarily have to re-encode if it were already a vic-supported format,
>>> e.g., H.264.
>>>
>>> thanks,
>>>
>>> -gurcharan
>>>
>>> --
>>> -------------------------
>>> Gurcharan S. Khanna, Ph.D.
>>> Director of Research Computing
>>> Office of the Vice President for Research
>>> http://rc.rit.edu
>>>
>>> Assistant Research Professor, Ph.D. Program
>>> Golisano College of Computing and Information Sciences
>>> http://people.rit.edu/gskpop
>>>
>>> Director, Interactive Collaboration Environments Laboratory,
>>> Center for the Advancing the Study of Cyberinfrastructure
>>> http://icelab.rit.edu
>>> ---
>>> Rochester Institute of Technology
>>> 1 Lomb Memorial Drive
>>> Rochester, New York 14623-5603
>>> Phone: 585-475-7504  ~  Cell: 585-451-8370
>>> Email: gurcharan.khanna at rit.edu
>>>
>>>
>>>
>
>
> --
> -------------------------
> Gurcharan S. Khanna, Ph.D.
> Director of Research Computing
> Office of the Vice President for Research
> http://rc.rit.edu
>
> Assistant Research Professor, Ph.D. Program
> Golisano College of Computing and Information Sciences
> http://people.rit.edu/gskpop
>
> Director, Interactive Collaboration Environments Laboratory,
> Center for the Advancing the Study of Cyberinfrastructure
> http://icelab.rit.edu
> ---
> Rochester Institute of Technology
> 1 Lomb Memorial Drive
> Rochester, New York 14623-5603
> Phone: 585-475-7504  ~  Cell: 585-451-8370
> Email: gurcharan.khanna at rit.edu
>
>




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