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From: wes@uh.msc.umn.edu (Wes Barris)
Newsgroups: comp.sys.sgi
Subject: Re: Video recording options?
Message-ID: <4069@uc.msc.umn.edu>
Date: 10 May 91 14:20:16 GMT
References: <1991May9.164242.18284@cs.yale.edu>
Sender: news@uc.msc.umn.edu
Reply-To: wes@msc.edu
Organization: Minnesota Supercomputer Center
Lines: 40

In article <1991May9.164242.18284@cs.yale.edu>, nathan@jacobi (Nathan F.
Janette) writes:
> 
> 1. VideoFramer
>    - high res capture
>    - 1 frame / 15 seconds
>    - $7,500 list
> 
>    stuff deleted...
> 
> It seems that it would take an awful long time to make a ten minute high res
> video capture with a reasonable number of frames!  What gives?  The sales rep
> said the slow frame capture time has to do with rgb to ntsc conversion.
> 
We use the Video Framer.  You have to supply it an IRIS "RGB" file of the
proper size.  This size varies depending on your selected mode.  For
example, I use the D1 output whose corresponding size is 720x486.  Sending
image data out the D1 (or any other) port on the Video Framer takes about
five seconds.  I send this image to an Abekas A60.  If you are going
directly to tape, you will have to do this frame-by-frame
(preroll/edit/postroll, etc.)  This process generally takes about ten
seconds per frame.

Making a 1000 frame movie could take around four hours just to record.

> Are these the only/best options?  Is there no real-time option?
> 

I have heard of some up-coming SGI product that will provide a "real-time"
scan converter and multiple-video outputs.  However, this wont help if
you can't display your images in real time.

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