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Re: Joint Techs HD Multicast


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  • From: Marshall Eubanks <>
  • To: Michael Wellings <>
  • Cc: Dave Devereaux-Weber <>, Petr Holub <>, Michal Krsek <>, "'Joel Jaeggli'" <>, "'Richard Mavrogeanes'" <>, "'Frank Fulchiero'" <>, "'Todd Needham (RESEARCH)'" <>, "'Ben Fineman'" <>, "'Research Channel Working Group'" <>, "'wg-multicast'" <>
  • Subject: Re: Joint Techs HD Multicast
  • Date: Sat, 15 Jul 2006 14:10:29 -0400

Oh, that reminds me -

Right now I am researching the purchase of 1024x768 (p) cameras (of which there are a number). We will
need at least dozens. If anyone has any experience, suggestions or recommendations, I would be glad to hear of it.

Regards
Marshall


On Jul 15, 2006, at 1:55 PM, Michael Wellings wrote:



forget 1080p cameras for now unless you have a ton of money
like it or not, we still live in an interlaced world (at the source end any)

hollywood can afford better.

we use 1080i as it affords higher raw bitrates etc, and stress- testing apps and networks is the other half of what we do

mike



On Sat, 15 Jul 2006, Dave Devereaux-Weber wrote:

Marshall,

I'm using a Sony HVRZ1U camera - it doesn't do 1080p. It does 1080i or SD.

Dave

Marshall Eubanks wrote:
It seems odd to me to be having this discussion without any
discussion or even mention of bit rates.
I can do 1280 p at 29.97 fps and my little laptop can decode it no sweat... if I
encode at 100 kpbs.
Also, coming from the computer / network side of things, I have to say that I never
intend to source any interlaced video, at least on my own dime. Why use a 70 year old analog
compression technology if you don't have to ?
Regards
Marshall
On Jul 14, 2006, at 1:41 AM, Petr Holub wrote:
I'm keen to see if there are any clients who can display
1080i in H.264. My current experience with H.264 + QuickTime
is I don't have a machine powerful enough to do that.
Although I can do 720p without any problem with the same codec.
Same feel with Real and Windows Media (AKA VC-1). It is no realistic to
expect see H.264 like codec 1080[ip] stream on PC.
Actually, in my experience, the only 1080i streams I'm able to
render on commodity high-performance PCs are MPEG2
(and uncompressed ;o) ).
My question was, whether somebody has been more successful
with any of MPEG-4 and/or AVC (aka H.264) on PC... Or is it
better say on quad-core G5-based PowerMac?
Thanks,
Petr
================================================================
Petr Holub
CESNET z.s.p.o. Supercomputing Center Brno
Zikova 4 Institute of Compt. Science
162 00 Praha 6, CZ Masaryk University
Czech Republic Botanicka 68a, 60200 Brno, CZ
e-mail:

phone: +420-549493944
fax: +420-541212747
e-mail:


--
David Devereaux-Weber, P.E.

Network Services http://cable.doit.wisc.edu/
Division of Information Technology
The University of Wisconsin - Madison
(608)262-3584





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