Added post about DeckLink BlackMagic card.

know-how/hardware/_posts/2015-10-09-decklink-blackmagic.md

@@ -0,0 +1,23 @@
+---
+title: DeckLink BlackMagic Quad
+language: en
+layout: default
+created: 2015-10-09 11:16:16 +0100
+updated: 2015-10-09 11:16:16 +0100
+toc: false
+tags:
+  - know-how
+  - hardware
+  - decklink
+  - blackmagic
+---
+DeckLink BlackMagic Quad
+========================
+
+    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](http://stackoverflow.com/questions/19212047/ffmpeg-command-line-for-capturing-and-recording-audio-and-video-in-720p-from-d).