[FFmpeg-devel] [PATCH]lavd/decklink_dec: Do not claim to output transparency information

Marton Balint cus at passwd.hu
Fri Oct 6 22:10:51 EEST 2017

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.


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