diff --git a/lang/C.wiki b/lang/C.wiki
index 5d3dee2..a11c7b9 100644
--- a/lang/C.wiki
+++ b/lang/C.wiki
@@ -16,6 +16,8 @@ standard library functions
  - string to long
 * man fgets
  - get string from file
+* *calloc* 
+  - Allocates memory and sets it to zero
 
 == Also See ==
 
diff --git a/tech/ffmpeg.wiki b/tech/ffmpeg.wiki
index f32ca39..51a3fb2 100644
--- a/tech/ffmpeg.wiki
+++ b/tech/ffmpeg.wiki
@@ -21,7 +21,8 @@ ffmpeg -i in.mp4 -ss 00:00:30.0 -c copy -t 00:00:10.0 out.mp4
 
 == Library ==
 
-The C library for ffmpeg has poor documentation.
+The C library for ffmpeg has poor documentation. It is also known as 
+*libav*
 
 Movie files consist of several components in the FFMPEG model.