[AG-TECH] Sony EVI-HD1 camera
John I Quebedeaux Jr
johnq at lsu.edu
Fri Mar 9 09:07:57 CST 2007
Well, that camera does specify the type of output that Ultragrid
works with on that HD-SDI connection (SMPTE-292M output)... i suspect
then the details get down to the hardware on the computer side and
networking, etc. It has other outputs, but not IEE1394 (firewire)
which is where most HD cameras do onboard mpeg2 encoding/lag that
Brian spoke of. I'm... guessing? that HD-SDI is uncompressed.
My concerns in meetings get back to having an "environment" of human
presence @ multiple sites that can interface naturally - which
includes video sources from the front and back of the room (what I
call "environmental feedback") - typically called the "presenter
camera" in the back of an AG room. I can possibly see having an HD
camera in the front and back of the room to do this... then maybe
another for... i've always felt you can't have enough cameras!
John I. Quebedeaux, Jr.; Louisiana State University
Computer Manager LBRN; 131 Life Sciences Bldg.
e-mail: johnq at lsu.edu; web: http://lbrn.lsu.edu
phone: 225-578-0062 / fax: 225-578-2597
On Mar 8, 2007, at 4:11 PM, Colin Perkins wrote:
> We've done some work with uncompressed HD conferencing which might
> be relevant: http://ultragrid.east.isi.edu/
> On 8 Mar 2007, at 21:14, Brian Corrie wrote:
>> Hi John,
>> Interesting... Does anyone know anything about SDI HD capture
>> cards. We are looking at HD as well (but no direct experience yet)
>> and the trick seems to be to get video off of the camera avoiding
>> the onboard encoding of the video, which often adds significant
>> latency (which is not good for AG of course). Does anyone know if
>> the SDI out of this camera either has onboard hardware encoding
>> (so low latency) and/or whether the SDI out is uncompressed video
>> (I don't know anything about SDI other than that it is a broadcast
>> oriented standard). Since this is a video conferencing camera one
>> would assume the SDI is raw video (it looks like it base on my
>> reading). So once one gets it out of the camera how does one get
>> it to the computer... There must be an HD SDI capture card available.
>> We are looking at the Sony HDR-HC7 prosumer HD camcorder as a
>> possibility. They aren't available yet, but any day now... They
>> have HDMI out, which is uncompressed video. There is a HDMI
>> capture card that can handle raw uncompressed HD video at 1080i
>> available from Black Magic that looks promising... The camera is
>> around $1500 and the card is $250.
>> We are going to be purchasing this pair as soon as the camera is
>> available, so I will let everyone know how this works out. If it
>> does work its a pretty inexpensive HD solution!
>> John I Quebedeaux Jr wrote:
>>> Someone asked me about this camera for HD use on the AG: http://
>>> Anyone have any experience with it? I'm wondering if it was used,
>>> how to best "capture" it into a system for use on the AG...
>>> interest in using HD is high here. I'm more concerned about
>>> logistical issues with high resolution images on displays that
>>> don't have that much "resolution" space - particularly if several
>>> sites are involved.
>>> -John Q.
>>> John I. Quebedeaux, Jr.; Louisiana State University
>>> Computer Manager LBRN; 131 Life Sciences Bldg.
>>> e-mail: johnq at lsu.edu; web: http://lbrn.lsu.edu
>>> phone: 225-578-0062 / fax: 225-578-2597
> Colin Perkins
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