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19990603: creating satellite animation from gifs

Donna,

the convert line I showed accepts gifs and produces an
animated gif without any intermediate pnm files.

Since you had mentioned animated gifs in your previous message, I assumed
that was the output you were refering to. I do show some examples on the
gempak page for producing mpegs- which are different from animated gifs-
but since most web browsers now support looping animated gifs, they are
what I typically use, eg the lightning animation at:
http://www.unidata.ucar.edu/packages/gempak/examples/lightning/lightning.html


Imagemagick can accept any number of different input formats and produce
a wide range of output formats. In the example I sent you today,
the file extension .gif defines that the output would be to a ltgloop.gif 
gif format file which would be suitable for viewing as an animated gif.

I'll update the gempak examples to show how I arrive at the enimated lightning
gif file.

Steve Chiswell
Unidata User Support



>From: address@hidden
>Organization: .
>Keywords: 199906031631.KAA21728

>Steve,
>
>The demos on the GEMPAK Web page do not mention ImageMagick so I 
>don't know any thing about it.  Does it accept input in the form
>of gif files directly?  It would be nice not to have to go through
>the conversion step.  What is the format of ImageMagick output?
>Is it mpeg?
>
>Donna Tucker                      http://chinook.phsx.ukans.edu/tucker.html
>address@hidden      Department of Physics and Astronomy  
>(785) 864-4738 (new area code!)    University of Kansas                 
>(785) 864-5262 (fax)               Lawrence, KS  66045-2151                   
>  
>
>
>> 
>> >From: address@hidden
>> >Organization: .
>> >Keywords: 199906031507.JAA19642
>> 
>> >The script to create satellite animation from gifs refers to the package
>> >pmbplus but does not say where to obtain this software.  Where can I
>> >get it?
>> >
>> >Donna Tucker                           http://chinook.phsx.ukans.edu/tucker
> .html
>> >address@hidden      Department of Physics and Astronomy  
>> >(785) 864-4738 (new area code!)    University of Kansas                 
>> >(785) 864-5262 (fax)               Lawrence, KS  66045-2151                
>    
>> >  
>> >
>> 
>> Donna,
>> 
>> You can download pbmplus from many sites, including:
>> http://www.acme.com/software/pbmplus/
>> 
>> I'll have to double check what script you are refering to. I currently use
>> ImageMagick (ftp://ftp.wizards.dupont.com/pub/ImageMagick/ImageMagick.html)
>> to create my www page animaged loops like:
>> 
>> convert -loop 10 -delay 1 file1.gif ... file3.gif -delay 200 fileN.gif ltglo
> op.gif
>> 
>> The convert program in ImageMagick allows specifying the delay between
>> frames as well as the number of times the loop will run. In the above
>> usage, there will be a 1 ms pause on each frame followed by a longer 200 ms
>> pause on the last from.
>> 
>> Steve Chiswell
>> ****************************************************************************
>> Unidata User Support                                    UCAR Unidata Program
>> (303)497-8644                                                  P.O. Box 3000
>> address@hidden                                   Boulder, CO 80307
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>> 
>