On 16 Dec 2008, at 08:05, Chris Wood <[email protected]> wrote:
Hi James
In addition to what Michael wrote:
- If you're adding a mask to a movie, unless you can add alpha to
the movie file (i'm not aware of a format that supports it, but
perhaps there is one)
We just happened to need to do the very same thing recently. As I was
preparing to make a CI filter to make a dynamic mask image from a
monochrome matte movie, our video guy handed me a QuickTime using the
Animation codec which had a built-in alpha channel that just worked
with a billboard set to Over. Job done, if you can bear the codec that
is.
Other codecs no doubt support alpha channels and you need a way to
render such movies in the first place, we used After Effects but I'm
sure there are more possibilities out there.
Ade.
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