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 it.
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
0001-Adding-options-to-disable-Decklink-passthrough-on-ca.patch
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