user16739: 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).

user1871: 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

16739: <p>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</p>

<p><strong>Kindly share the exact command to take this rtmp stream to Decklink Studio 4K card(SDI).</strong></p>
 1871: <p>As the <a href="https://ffmpeg.org/ffmpeg-devices.html#decklink-1" rel="nofollow">docs</a> say,</p>

<blockquote>
  <p>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</p>
</blockquote>

<p>If so, run</p>

<pre><code>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"
</code></pre>

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