On Wed, Mar 4, 2009 at 10:13 AM, Grzegorz Adam Hankiewicz <
[email protected]> wrote:
>
> I'm using a mov file which presumably contains transparency info (
> http://dl.getdropbox.com/u/145894/test.mov
> ) and the resulting .png images seem to be in RGBA format, but the
> alpha channel is completely opaque. Where it should only show the
> rendered articles I get a full black background.


I don't think I have ever used a movie which contains alpha - there really
isn't a typical use-case for that feature. The only compressor I am aware of
that will actually encode alpha channels in a movie is huffyuv (
http://neuron2.net/www.math.berkeley.edu/benrg/huffyuv.html).

Is this a limitation of avbin or the function that saves the png?


The image save certainly supports alpha channels in png - I am having a
world of trouble trying to get it to remove the alpha channels.

-- 
Tristam MacDonald
http://swiftcoder.wordpress.com/

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