The Decklink Quad 2 and Duo 2 cards (which are also used in the M|8R) are specific as their connectors can be "mapped" to devices. And depending on the way the card is configured you will have different behaviours in our software. In most situations for our software (except if you want to do keying) you will want to change the default connector mapping.
If you don't change the connector mapping,
- with a Decklink Quad 2, you will have maximum 4 in and 4 out (but not 8 in or 8 out) and
- with a Decklink Duo 2, you will have maximum 2 in and 2 out (but not 4 in or 4 out) and with a Decklink Duo 2.
What is the "Connector Mapping" for ?
The main reason for this option is that Blackmagic-Design wanted to do 2 things:
- have a card with configurable in/out
- have the possibility to do internal and external key (which requires to "group" connectors")
- have the possibility to have a "passthrough" when using an ingest application such as MovieRecorder (so when you start MovieRecorder, the incoming signal is sent to the other connector for monitoring purposes.
- maintain compatibility with the previous versions of Decklink Duo and Quad cards (this is why the card is configured by default with the connectors "grouped")
Where do I change the "Connector Mapping"?
To change the connector mapping, start the application “Blackmagic Desktop Video Utility”, then:
- Use the left and right arrows to select the "Device" you want to configure.
- For a Decklink Duo 2, you will have 4 "devices" named by default "Decklink Duo (1) -> Decklink Duo (4)
- For a Decklink Quad 2, you will have 8 "devices" named by default "Decklink Quad (1) -> Decklink Quad (8)
- Once you have selected the device you want to configure, click on the settings icon:
- At the bottom of the setting page, you will see a section named “Connector Mapping”. By default, for the first device, it should be set to Connector: SDI 1 & SDI 2. This means that the connector number 1 and connector number 2 are "grouped".
- You can change the Connector mapping to "SDI 1" only (for the Decklink Quad (1)).
What is the recommended configuration for Softron ?
In most situations with our software, you will want to change the connector mapping so they are NOT grouped. So for example, for device "Decklink Quad (1), set the connector mapping to "SDI 1", etc... This will allow you to really configure the inputs and outputs the way you want.
You will only want to "group" the connectors in the following cases:
- with out playout applications, if you want to playout using the keying feature of the card. See below for more explanations on this.
- with our ingest applications, if you want to have a passthrough of the incoming video to the output connector
What happens in both configurations ?
Let's take the example of the device "Decklink Quad (1)" of a Quad card.
Connector Mapping = SDI 1 & 2
Maximum number of inputs and outputs
When using connector mapping 1 & 2, you won't be able to use the device "Decklink Quad (5)", as that device would otherwise use the connector SDI 2.
Indeed, if you configure the devices 1 to 4 to use "grouped" connectors, then the connector mapping will look something like this:
As you can see you can thus have maximum 4 inputs and 4 outputs. Not 8 simultaneous inputs.
Keying with our playout applications
With our playout applications, if you:
- enable internal keying , the input will be made on the connector SDI 1 and the output on the connector SDI 2
- enable external keying, the Fill will be made on connector SDI 1 and the Key will be made on connector SDI 2:
Connector Mapping = SDI 1
In that configuration, you won't be able to do keying with our playout applications, but you will be able to use connector SDI 1 and SDI 2 independently. And thus, if you configure the devices 1 to 4 to use "independent" connectors, then the connector mapping will look something like this:
Note that the order of the connectors can be quite confusing...
Also, you won't be able to do keying with our playout applications.