[FFmpeg-devel] Patch that adds options to Decklink input and output modules.

Baldur Gislason turbobaldur at gmail.com
Thu Sep 6 16:40:31 EEST 2018

I have prepared a patch that adds two things.
On the Decklink input side, it adds a parameter called 'passthrough'
which makes it possible to change from the default behaviour on cards
that can handle both inputs and outputs. The default behaviour on such
cards depends on the model but many of them will pass through the
input signal if the application generating the output stops. This is
not always desirable so the Decklink API provides a method of changing

On the output side, it adds a parameter called 'sdi_link' which is
crucial when working with SDI output cards that support 3G SDI or
faster. The default behaviour for 1080p60 for example is to use two
HD-SDI links and the default for 2160p29.97 is to use four HD-SDI
links. This option makes it possible to specify how many SDI links are
to be used to make use of 3G, 6G or 12G SDI capabilities of newer
cards which can output those configurations over a single cable.

Baldur Gislason
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