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

Marton Balint cus at passwd.hu
Fri Oct 6 22:16:33 EEST 2017

On Thu, 5 Oct 2017, Matthias Hunstock wrote:

> Am 02.10.2017 um 18:34 schrieb Marton Balint:
>> Yeah, you can capture both at the same time, and one signal might be
>> key, other might be fill, but as far as I know the driver will not
>> merge these two signals behind the scenes to one single input with an
>> alpha channel. 
> Is there a video filter for splitting RGBA->key/fill or joining key/fill
> -> RGBA? Then an example in the docs would be helpful, though I'm not
> sure if the two streams will be perfectly synchronized.

Both should be doable with extractplanes or mergeplanes filters.


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