hi all

just checking if I understand the concept properly:
A key frame is a full uncompressed frame in an animation and all frames
between a key frame and the next are stored as the difference between
successive frames.

So if I have a animation of length 60 frames and set the key frame rate to
60, this should give just 1 key frame. correct? and therefore the smallest
.avi file ???

Thanks
jim

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In article <3c891329@news.povray.org> , "jimbobjim" 
<jim### [at] blueyondercouk> wrote:

> So if I have a animation of length 60 frames and set the key frame rate to
> 60, this should give just 1 key frame. correct? and therefore the smallest
> .avi file ???

No, not really the smallest possible file if you have multiple scenes you will
get much better results with dynamic (automatically determined to be
necessary) keyframes.  However, those are not supported by all encoders also
many decoders do actually support this.  the reason why a dynamically inserted
keyframe in a (longer9 sequence will be better is that whenever you have some
kind of "cut" practically the whole frame content changes and thus compression
of only the different parts will in 99.995 of all cases require more storage
than a keyframe.


    Thorsten


____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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