diff --git a/controller/README.md b/controller/README.md
index 3bf6f59..c333922 100644
--- a/controller/README.md
+++ b/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
+```