Re: Best Movie/Animation Format for LARGE files

[wcapehar(at)my-deja.com]

In article <88rm7q$qqa$1@pukkie.phys.uu.nl>,
  P.Suetterlin@astro.uu.nl wrote:
> In article <MPG.131a56a6dc21d88e989a3b@news.frii.com>,
> 	davidf@dfanning.com (David Fanning) writes:
>
> >> I have been working on some large image time series (long in time
and
> >> large in size) and am wondering what the best format (jpeg/mpeg)
for
> >> saving them with the least distortion to the frames.
>
> >> Ideas? (I'm already breaking up the time series into smaller
clips.)

> > I've been getting reports--John Broccio's article today is
> > only the latest--of poor resolution when making MPEG movies.

> I had one try at the built-in MPEG creation of IDL and immediately
> dumped it.  I'm creating my mpegs using mpeg_encode (Version 1.5).

> You have to store the single frames on disk, so no memory
> limitations.  Of course mpeg (and jpeg, too) are lossy compression
> tools, I only use them if I only want to look at them, and don't
> intend to do (e.g.) photometric work..

> PS: That's under Unix.  Not sure, but mpeg_encode might also compile
>     under other OS.


I agree with the degradation issue.  Small mpeg movies (in time steps
and in the image sizes) are fine but larger ones, tend to "coarsen up."

Bill Capehart


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