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DeckLink BlackMagic Quad en default 2015-10-09 11:16:16 +0100 2015-10-09 11:16:16 +0100 false
know-how
hardware
decklink
blackmagic 
ffmpeg -f decklink -i "DeckLink SDI (1)@3" -framerate 25 -vf "yadif=0:-1,scale=1280:720,setdar=16/9" -codec:v mpeg4 -r 25.000 -b:v 2000k -maxrate 3500k -c:a libvo_aacenc -b:a 256k -f mpegts udp://10.24.141.132:1234 -vf "scale=320:200" -c:a mp3 -f mpegts udp://10.24.141.132:1235

You can use any of the 4 BlackMagic processors by specifying DeckLink SDI (1) … DeckLink SDI (4). The number after the @ is the port.

This example streams the signal on port @3 in 2 different formats to different ports on 10.24.141.132.

More info on StackOverflow.