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Subject: Re: FLASH: BMP or JPG
From: Patrick Levy
Date: Tue, 29 Dec 1998 18:14:29 GMT

Thanks, Byron (also Rick & Erik) - you nailed all the issues I was
pondering.

Patrick

-----Original Message-----
From: Byron Canfield <barnatbyronc [dot] com>
To: flasheratshocker [dot] com <flasheratshocker [dot] com>
Date: Tuesday, December 29, 1998 11:27 AM
Subject: Re: FLASH: BMP or JPG


>The only thing impacted through the import of original images with no
>compression (BMPs, GIFs, or PNGs) is the size of the FLA file. If you
>export using JPG compression, you can actually achieve better compression
>than if the original imports are JPG files, as you eliminate the "double
>compression" problem, where already compressed files no longer exhibit
>large compressible ranges of color.
>
>With the use of a significant number of bitmapped files, however, it is
>generally recommended that you stick with a fixed movie size when deploying
>your SWF in an HTML file (specific Width and Height settings), rather that
>sizing to fit the browser window, as that resizing will generally impart
>defects to the images.
>
>Also, in general, the smaller you can compress the images (smaller numbers
>for JPG compression quality), the smoother they will animate.
>
>One trick you can use, though it increases the size of the exported SWF, is
>to use an extremely compressed version of each image for any animation,
>since image quality is less noticable in an image in motion, and then, when
>the image "lands" in a position where its detail may come under scrutiny,
>substitute a higher quality image, with compression (or none) manually
>specified.
>
>At 10:34 AM 12/29/98 -0600, you wrote:
>>A question for experienced flashers: I'm creating what will be, no doubt,
a
>>fairly large .swf file that will incorporate a fair number of bmp/jpg
images
>>with alpha channel fades (for a good example of what I'm doing, see
>>http://www.bodyofwork.com). My question is this: What's the most
efficient
>>way to bring in these images? Obviously, bmp's will be larger, but not
>>involve any decompression processing, while compressed jpg's will result
in
>>smaller file size, but involve more processing on the user's end (at least
I
>>think that's obvious, maybe their are different considerations in the
flash
>>environment). What works best, in your experience, from the standpoint of
>>delivering a smooth animation?
>
>--------------
>Byron Canfield, Canfield Studios (http://www.byronc.com)
>President, Seattle Coreldraw Artists Network (http://www.corelsea.org)
>
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