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

[Marton Balint]

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