XP GIF display oddities

[Chipp Walters]

David,

I believe Jacqueline is correct. You probably saved the GIF with 
incorrect settings.

The GIF format has several ways to further compress an animation 
(besides just LZW and reduced # of colors).

One way is to do interframe compression by only storing differences 
between frames, instead of storing a separate image for each frame. 
This can be called "redundant pixel removal." Most animated GIF 
programs automatically turn this on. While it works great in browsers 
(because it makes for very small files), it's not good for RR as the RR 
engine needs to step forwards and backwards through a GIF file 
(browsers, don't), which is most difficult from an engine point of 
view. See if your software can build GIFs without redundant pixel 
removal (ImageReady can do this).

Another way is to use a bounding box compression scheme, which looks at 
the background of a single frame and draws a box around only the pixels 
which are different. So a 100 x 100 frame could have a small logo in 
the middle which would be bounded by a region 50x50, so the GIF file 
only stores the 50x50 rectangle and includes a pointer to the place 
where it starts.

Again, it's probably wise to turn this feature off as well (again, 
ImageReady can do this).

So, try reprocessing you GIF's and see if it doesn't solve your 
problems. It should.

--Chipp Walters, Altuit, inc.

On Jan 3, 2004, at 7:29 AM, DVGlasgow at aol.com wrote:

>
> In a message dated 31/12/03 8:49:06 PM, Jacqueline Landman Gay writes:
>
>> The usual reasons for inconsistent graphics displays are either that 
>> the
>>
>> monitor is set to display too few colors, or the graphics card driver 
>> is
>>
>> out of date. Installing the latest driver for the card is usually
>> recommended.
>
> Thanks, Jacquline,
>
> In an update, the customer tells me that the standard pointy finger 
> icon
> appears on a black background.  I seem to remember this being 
> discussed ages ago
> on the list, but I can't find it.  Anyone help?
>
> The Hogmanay reference was a bit early, but I didn't think I would 
> post again
> until it was over.  And of course, Revolution *must* be 'Hogmanay' or 
> maybe
> with a nod to the French contingent, 'hoguinane'.
>
>
> Best wishes,
>
> David Glasgow
>
> Forensic Psychology Software and Services <A
> HREF="http://members.aol.com/dvglasgow/i-psych/i_Psych.htm">i-Psych</A>
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