| Re: Best Movie/Animation Format for LARGE files [message #18999] |
Mon, 21 February 2000 00:00 |
wcapehar
Messages: 12
Registered: May 1998
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Junior Member |
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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
Sent via Deja.com http://www.deja.com/
Before you buy.
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| Re: Best Movie/Animation Format for LARGE files [message #19010 is a reply to message #18999] |
Mon, 21 February 2000 00:00  |
pit
Messages: 92
Registered: January 1996
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Member |
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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..
Peter
PS: That's under Unix. Not sure, but mpeg_encode might also compile
under other OS.
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~
Dr. Peter "Pit" Suetterlin http://www.astro.uu.nl/~suetter
Sterrenkundig Instituut Utrecht
Tel.: +31 (0)30 253 5225 P.Suetterlin@astro.uu.nl
____________________________________________________________ ______________
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