How do I playout rtmp stream to SDI (Decklink Studio 4K) using FFMPEG command?we are using Windows 7 operating system ffmpeg -re -i rtmp://server/live/streamname \
-c:v rawvideo -pix_fmt uyvy422 -vf scale=720x576 \
-c:a pcm_s16le -ar 48000 -ac 2 \
-f nut - | /bmd/bmdplay -C 0 -m 2 -f pipe:0

Kindly share the exact command to take this rtmp stream to Decklink Studio 4K card(SDI).
As the docs say,


  you need the Blackmagic DeckLink SDK and you need to configure with
  the appropriate --extra-cflags and --extra-ldflags. On Windows, you
  need to run the IDL files through widl


If so, run

ffmpeg -re -i rtmp://server/live/streamname -c:v rawvideo -pix_fmt uyvy422 -vf scale=720x576 -c:a pcm_s16le -ar 48000 -ac 2 -f decklink "Device"


where Device is to replaced with the name of 'Decklink Studio 4K' as indicated by ffmpeg -f lavfi -i nullsrc -f decklink -list_devices 1 dummy