[Xerte] Flash transparency

[Ron Mitchell]

As I've been doing some green screen tests for something else I  just did a
quick test with a .flv exported from Premiere. You have to select the encode
alpha channel option as detailed here
http://blogs.adobe.com/premiereprotraining/2010/07/exporting_video_with_an_a
lpha.html so that the .flv includes the alpha channel. The problem is if
you're using toolkits rather than xerte I doubt you can achieve what you
want without changing some code. A couple of issues I can see...

 

1. if you import the .flv into the video page type in toolkits it should
import ok and retain the transparency of the .flv but that page type has a
white panel behind the clip so the benefit of the green screen is lost. You
can hide that with code or remove it altogether by tweaking the model and to
be honest I think wherever the white panel is included in different XOT page
types there should be an optional property to hide it but I guess that could
be something for a future release.

 

2. In the video page type you also get the controller by default with no
option to turn it off so depending on what you're trying to achieve that may
not be desirable.

 

3. Similar issues apply to swf's containing transparency e.g. the flash
animation page and image and sound page contain the white panel. However you
might be able to achieve what you want by using the column navigator page
with an optional image property added - that also allows selection of a .swf
but doesn't include the white panel so if the swf is transparent it looks as
it should.

 

I guess to summarise both toolkits and xerte support transparency in .swf
.flv and of course .png but it depends on what you're trying to achieve
whether you can do this without changing code or by using xerte rather than
XOT.

 

HTH

Ron

 

From: xerte-bounces at lists.nottingham.ac.uk
[mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Adam Read
Sent: 15 July 2010 09:25
To: 'Xerte discussion list'
Subject: [Xerte] Flash transparency

 

Just wondering whether Xerte Toolkits supports flash videos (or swfs) with
transparent backgrounds? I was thinking of doing some green screen stuff for
some upcoming projects.

 

FYI, I'm not using Xerte 3 yet.


Thanks, Adam

---------------------------------------------------------

 Adam Read

 Learning Technologist

 University College Plymouth St Mark & St John

 




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