[AG-TECH] HD on AG

Gurcharan S. Khanna gskpop at cis.rit.edu
Sun Dec 14 20:50:07 CST 2008


Piers O'Hanlon wrote:
> 2008/12/15 Gurcharan S. Khanna <gskpop at cis.rit.edu>:
>   
>> All,
>>
>> I, too, am extremely interested in vic supporting HD formats, (including
>> uncompressed!)
>> One of the issues is the encoding latency problem. Not sure there's a nice
>> low latency
>> software encoding solution out there yet. Alternatively, we might look at
>> cheap hardware
>> encoders as the answer or HDMI cards to take the input from the camera. Can
>> vic be made
>> to take the output of, say, the BlackMagic Design HDMI card on a Mac?
>>
>> I am currently using AGDV under windows but would like to move to linux and
>> use the
>> HDV/DV linux vic for the DV part; i don't think it's encoding the HDV, just
>> accepting
>> it as input from the camera already encoded??? [chris?]
>>
>>     
> It is possible to just packetise the compressed data from a camera,
> though as Chris points out it tends to have quite high latency. That
> is why the ultragrid and derivatives used uncompressed HD as their
> sources. VIC doesn't currently support mpeg2 nor does support
> packetisation of an existing compressed mpeg2 stream.
>   
wait, i thought chris' vic supported HDV, which i assume is mp4???

also, how hard/easy would it be for vic to support packetizing 
uncompressed HD?

:-)

-gurcharan
> Piers
>
>
>
>   
>> My ideal would be to encode the presenter's laptop output and deliver that
>> as just another
>> video stream along side the presenter's video and the audience video and
>> have autoplace
>> lay them out nicely in a framed window, a la Adobe Connect or similar
>> products, so the
>> presenter, the slides, and additional commentary could be nicely recorded
>> for later video
>> on demand playback.
>>
>> Just my opinion (and need),
>>
>> -gurcharan
>>
>> Piers O'Hanlon wrote:
>>     
>>> Hi Derek,
>>>
>>> In principle VIC should be able encode and decode HD video - using one
>>> of the codecs that support such resolutions e.g. H.264 or h261as.
>>>
>>> One needs to modify some of the configuration code in VIC to allow
>>> selection of larger resolutions (ie HD one needs something from 720p
>>> (1024x720) upwards). And of course an HD source is necessary. We don't
>>> currently have access to any HD kit so haven't had a chance to work on
>>> it but anyone is welcome to try!
>>>
>>> Cheers,
>>>
>>> Piers
>>>
>>> 2008/10/22 Vine, Derek A <Derek.Vine at usd.edu>:
>>>
>>>       
>>>> Hello all,
>>>>
>>>>
>>>>
>>>> I am doing some research to spec. up a new AG room, and the group with
>>>> the
>>>> money is interested in HD video.  I see that The University of Queensland
>>>> has an HDV/DV VIC for Linux based systems already, but we would like to
>>>> stay
>>>> with Windows.
>>>>
>>>>
>>>>
>>>> I was just wondering what kind of time frame I can give them as to when
>>>> HD
>>>> will be supported in AG on Windows.  In particular, an HD VIC that will
>>>> take
>>>> its video from a capture card with an HD-SDI input, like the one attached
>>>> in
>>>> the PDF.
>>>>
>>>>
>>>>
>>>> Thank you in advance for your help.
>>>>
>>>>
>>>>
>>>> Derek Vine
>>>>
>>>> Communication Network Specialist
>>>>
>>>> The University of South Dakota
>>>>
>>>> 414 East Clark Street
>>>>
>>>> Vermillion, SD 57069
>>>>
>>>> (605) 677-8215
>>>>
>>>> dvine at usd.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
>>
>>
>>     


-- 
-------------------------
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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