On Thu, 5 Oct 2017, Maksym Veremeyenko wrote:
29.09.2017 0:20, Carl Eugen Hoyos пише:
Hi!
I don't have decklink hardware but I assume it never outputs actual
transparency.
Or does it?
it outputs or use internal keyer to put it over passthrow SDI signal.
in external keyer mode it accept BGRA frame and output two SDI signals:
one for *fill* another one for *key*
That is true, but that is the feature of the decklink output device.
Is the decklink *input* device capable of capturing in RGBA with useful
alpha? I'd say, probably not.
So I am more and more willing to accept the patch unless somebody has
strong objections.
Regards,
Marton
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