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Date: Wed, 10 Sep 2003 10:18:40 -0400
From: Phil Erickson <pje@haystack.mit.edu>
Organization: MIT Haystack Observatory
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To: Shunrong Zhang <shunrong@haystack.mit.edu>
Subject: Re: [gps-developers] Proposal for putting GPS data on Madrigal -
	365 days a year
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Shunrong Zhang wrote:
>>
>>Estimated disk space needs:
>>
>>1.  Madrigal files:  250 MB/year of data
>>2.  Movie files:   1500 MB/year of data (mpeg files, not avi)
> 
> 
> The official MATLAB 6.X can produce avi movie only but there are
> non-official functions that generates mpeg. An avi seems smaller in size
> than an mpeg.
> 

I would disagree with using AVI formats, as they originated at Microsoft 
and are not an open standard.  MPEGs are closer to that ideal.

For example, this describes AVI:

"AVI, the proprietary format of Microsoft's "Video for Windows" 
application, merely provides a framework for various compression 
algorithms such as Cinepak, Intel Indeo, Microsoft Video 1, Clear Video 
or IVI."

whereas this describes MPEG:

"Although mentioned here as an animation (video) format, MPEG (named for 
the Motion Pictures Experts Group) also describes an ISO (International 
Standards Organization) compression standard for audio and other data."

I'd pick an ISO standard any day.

----
phil


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