All things related to multicast

[Marshall Eubanks <>]

Hello;

On Jul 15, 2006, at 1:26 PM, Petr Holub wrote:

> > I can do 1280 p at 29.97 fps and my little laptop can decode it no
> > sweat... if I
> > encode at 100 kpbs.
>
> Of course, but 100 kbps isn't very realistic for encoding 1080i or  
> 720p
> video, right? I'd expect bitrates 6 - 12 Mbps. BTW, you can use
> Apple's trailers for testing if you like - they seem to have about the
> reasonable compression to get the video through medium-bandwidth
> lines.

But that's exactly my point. Without a bit rate, I cannot evaluate  
claims of
the ability to do this or that (or not) at any resolution.


> > 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 ?
>
> Because 1080 @ 50/60p cameras are really really hard (expensive) to  
> get
> and also because it's a lot more data? And the trick is 30p is  
> different
> from 60i - if you look into motion smoothness, it's IMHO better to  
> go for
> 60i than 30p. Of course, the holy grail would be 60p, but at least wea
> are not rich enough to get 60p cameras at 1920x1080.

Record in the highest quality you can afford - it will retain value  
longer.

Regards
Marshall



> BTW, I'm also coming from the computer side and I don't like  
> interlacing as
> you do.
>
> Petr
>
> ================================================================
>                             Petr Holub
> CESNET z.s.p.o.                       Supercomputing Center Brno
> Zikova 4                             Institute of Compt. Science
> 162 00 Praha 6, CZ                            Masaryk University
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