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Re: gif again [message #32337 is a reply to message #23077]

Wed, 02 October 2002 09:24

Stein Vidar Hagfors H[1] is currently offline

Stein Vidar Hagfors H[1]
Messages: 56
Registered: February 2000

Member

Reimar Bauer <R.Bauer@fz-juelich.de> writes:

> Hi
>
> you are seeing I am very interested in doing as simple as possible a
> set of animations.
>
> Yesterday someone tolds me thats it is possible to have uncompressed
> gif. Did someone know if rsi would implement this kind of format again
> in this mode.
>
> My slow motion animation of about 20 to 100 images would be best
> stored in gif. Because in difference to the other formats I can set a
> wait time to each frame. It looks like that's an uncompressed gif is
> smaller as a compressed mpeg multiplied the frames by 24.

If you can use the unix program mpeg_encode (e.g. version 1.5),
instead of IDL's "one-size-fits-all" MPEG cruncher, you don't have to
live with the huge files created by multiplying the frames. The key is
to encode all "extra" frames as a difference frame from the previous
one; since the difference is nothing, almost no space is needed.

In fact, I have a shell script that uses mpeg_play & mpeg_encode
together to "expand" a too-fast-playing mpeg by any (integer) factor,
without even having the original frames.

--
------------------------------------------------------------ --------------
Stein Vidar Hagfors Haugan
ESA SOHO SOC/European Space Agency Science Operations Coordinator for SOHO

NASA Goddard Space Flight Center, Email: shaugan@esa.nascom.nasa.gov
Mail Code 682.3, Bld. 26, Room G-1, Tel.: 1-301-286-9028/240-354-6066
Greenbelt, Maryland 20771, USA. Fax: 1-301-286-0264
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[Message index]

		GIF again..... By: Richard French on Fri, 05 January 2001 14:14
		Re: GIF again..... By: wmconnolley on Mon, 08 January 2001 02:13
		Re: GIF again..... By: Jeff Guerber on Fri, 05 January 2001 17:23
		Re: gif again By: Craig Markwardt on Wed, 02 October 2002 17:22
		Re: gif again By: Stein Vidar Hagfors H[1] on Wed, 02 October 2002 09:24

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