Chroma key (green/blue screen) blending

[Peter Maersk-Moller]

Thanks Sebastian. Should have seen that myself. Seems like the alpha plugin
can convert I420 to BGRA pretty much like videoconvert though it add the
feature I suggested, but with more sophistication. Unless it has a
different setup, I could suggest to merge videoconvert and alpha, but that
is just an oppinion.

I assume it is safe to expect that the alpha plugin is using the same YUV
to RGB conversion as videoconvert. At least it is using a similar high
amount of CPU as videoconvert for 1.2.2. I also assume/hope this is fixed
in 1.3 by the fix you guys and girls did for videoconvert?

Kind regards
Peter Maersk-Moller


On Wed, Jan 15, 2014 at 8:49 AM, Sebastian Dröge
<sebastian at centricular.com>wrote:

> On Mi, 2014-01-15 at 03:23 +0100, Peter Maersk-Moller wrote:
> > Hi
> >
> > This might be a bit off topic, but I was wondering if it would be a good
> > idea to enable the possibility of chroma key (green/blue screen) blending
> > to videoconvert? When converting to RGBA/BGRA it would be rather nifty if
> > videoconvert could be made to set the alpha value to values like
> indicated
> > in the following program:
> > [...]
>
> The alpha element can do that with the target-r, target-g, target-b
> properties. It's not really in the scope of videoconvert, which really
> just converts between raw video formats.
>
> --
> Sebastian Dröge, Centricular Ltd - http://www.centricular.com
> Expertise, Straight from the Source
>
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