Update README.md

controller/README.md

@@ -94,3 +94,13 @@ furthermore, this can be added at the end o the file:
 watchdog-timeout=15
 
 ```
+
+12. multiple cameras support
+```
+as multiple cameras need to be combined and avconv does not support the appropriate functionality an additional tool must be installed
+
+1. apt-get update
+2. sudo apt-get install imagemagick
+
+this is being used in /controller/config/__init__.py PICTURE_COMMAND when executing the "convert" command while combining multiple images
+```