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From: jbm@eos.arc.nasa.gov (Jeffrey Mulligan)
Newsgroups: comp.graphics
Subject: Re: Optical disk video recorders (was single frame VCRs)
Message-ID: <7627@eos.arc.nasa.gov>
Date: 29 Nov 90 00:09:00 GMT
References: <3379@bruce.cs.monash.OZ.AU> <3382@bruce.cs.monash.OZ.AU> <1990Nov27.185614.8769@imax.com> <1062@ai.cs.utexas.edu>
Organization: NASA Ames Research Center, California
Lines: 26

subramn@cs.utexas.edu (K. R. Subramanian) writes:

>I have used one of the Panasonic disc recorders at our supercomputer
>center. One big problem during playback is, if the frames in the 
>disc are not in sequence, then you are going to see an annoying
>flicker (the search time to go to a different part of the disc
>is clearly noticeable).

Yes.

>On a rewriteable disc, it is possible
>to move the frames around so that they are in sequence and 
>produce flicker free animation. Perhaps the newer versions
>of the video discs are better than the one we used, I dont know.

Rewritable or not, you need two drives to do this type of editing
(unless you are prepared to digitize the frame to be moved
and store it while you seek back to the new destination).
For the non-erasable media, Panasonic makes a play-only player
which is a lot cheaper that the unit which can also record.

-- 

	Jeff Mulligan (jbm@eos.arc.nasa.gov)
	NASA/Ames Research Ctr., Mail Stop 262-2, Moffett Field CA, 94035
	(415) 604-3745