diff --git a/README.md b/README.md
index 6199c42..3c8b91a 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,10 @@ parts of them. This can boil down to something like
 ffmpeg -i concat:2014-20-01-00-00.mp3|2014-20-01-00-01.mp3 -acodec copy -ss 160 -t 1840 foo.mp3
 ```
 
+This continous recording needs to be configured so that:
+ - It can be split in multiple directories, but the granularity of this must be below one directory per day.
+ - The filename must be fully informative, without looking at the parent directories.
+
 How to run
 ===========