Re: FLASH: Bitmap Motion Tweens not smooth enough

[DLA]

Randy,


Thanks for taking the time to write out this message.  It was helpful and

appreciated.  I am going to try the picture blur and see if that will make

it a little less noticeable as the pictures will be constantly moving

anyway.


Thanks for your help!


Best Regards,

Diana

----- Original Message -----

From: Randy Kato <

rkatobraincraft [dot] com

>

To: <

flasherchinwag [dot] com

>

Sent: Tuesday, August 29, 2000 11:03 AM

Subject: Re: FLASH: Bitmap Motion Tweens not smooth enough



> Diana,

>

> Do you mean "smooth" as far as the motion, or the image quality?

>

> If it's motion, I'm not sure how you're doing it now, but it may help to

only have the bitmaps that are currently visible on the timeline. You could

do this in a few ways, but I'd try to make them all SWFs and use LoadMovie

to load the next one in just before it moves into view, and then Unload them

as soon as they're gone. This should help take some unnecessary load off the

processor. Of course this relies on the fact that it is, as you say, a

constant stream, and not something

> the user can jump around in. And if it's a web presentation (I certainly

hope not -- can't imagine anybody downloading 20 min. worth of big bitmaps),

the LoadMovie idea might not work well due to the download time.

>

> Also, don't use any alpha settings on the images either as that would

REALLY tax the processor. Hmmm, what else...oh, straight (as in straight

horizontal or vertical motion) tweens are also slightly easier on the

processor than diagonals.

>

> If it's image quality, it seems like you've discovered the problem --

motion becomes jerky, especially at very slow speeds and (relatively) slow

frame rates dictated by hardware limitations. You'll see this in vectors too

when you're moving something such a minute amount that it's actually only

moving 1 pixel per several frames. It's more pronounced in

bitmaps/photorealistic images since the shift takes place across the entire

image. Couple this sea of pixel shifts with JPEG

> compression artifacts and what was once a nice clear representation of

what our eyes see in reality becomes...well, unsatisfying.

>

> Unfortunately, I think you've tried just about everything. If these images

are constantly moving, and won't be displayed statically, you might try

blurring them a bit in PShop/FWorks first. That might take a bit of the edge

off of the pixel shifting.

>

> Good luck!

> Randy

>

> DLA wrote:

>

> > Hi everyone,

> >

> > I have a client who wants me to create a 20 minute flash presentation.

There will need to be a constant stream of large, slow moving bitmaps,

motion tweening from the right side of the screen to the left.  (to display

their new product line) No matter what I try, the pictures are just not

smooth enough as they move.  I have already tried different types of JPEG

quality on export; checking/unchecking the "Allow Smoothing" button and

different frame rates with limited results.

>

> --

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