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Re: animated gif speed [message #87586 is a reply to message #87585]

Sat, 15 February 2014 16:23

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Paul Levine writes:

>
> Thank you for the suggestion. Though I must admit, I'm unsure how
> having GIF files will help with learning about IDLffVideoWrite; doesn't
> the IDLffVideoWrite object deal directly with movie files (AVI, MP4)
> rather than GIF files?
>
> It seems the conceptual hurdle I am having a hard time getting over is
> not the actual use of IDLffVideoWrite itself, but how to get my data in
> the form that feeding it to IDLffVideoWrite::Put will give me a video
> that appears how I want it.
>
> My data is a sequence of 2D floating point arrays; I am using the
> function graphics (am I supposed to call them "new" graphics?) to
> byte-scale the data to a color table, warp it to a map projection, draw
> continents, map grids, and color bar, etc. Is the trick simply to
> follow the equivalent steps from
> http://www.idlcoyote.com/gallery/avi_movie.pro where each frame is
> created (with map grid, continents, etc.), saved to a file, then read
> back in from the file to be loaded into the video stream?

This is probably too much work. Why not just do it like in the example
in the IDLffVideoWrite documentation and take a snapshot of your display
window. Do your thing in the display window, take a snapshot, and
display that in your video stream. My example writes files because
that's the only way I can get great looking fonts. You won't have that
problem. (Although you could have others, I suppose, depending upon
which version of IDL you are using.)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		animated gif speed By: Paul Levine on Sat, 15 February 2014 15:41
		Re: animated gif speed By: David Fanning on Sat, 15 February 2014 15:53
		Re: animated gif speed By: Paul Levine on Sat, 15 February 2014 16:15
		Re: animated gif speed By: David Fanning on Sat, 15 February 2014 16:23
		Re: animated gif speed By: Paul Levine on Sat, 15 February 2014 19:22
		Re: animated gif speed By: Fabzi on Sun, 16 February 2014 01:55
		Re: animated gif speed By: Paul Van Delst[1] on Wed, 19 February 2014 13:32
		Re: animated gif speed By: Dick Jackson on Mon, 17 February 2014 14:36
		Re: animated gif speed By: Paul Levine on Tue, 18 February 2014 16:17

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