Add the null video filter.

[libav.git] / doc / vfilters.texi

diff --git a/doc/vfilters.texi b/doc/vfilters.texi
index 9f20d46..45766cc 100644 (file)
--- a/doc/vfilters.texi
+++ b/doc/vfilters.texi
@@ -78,4 +78,8 @@ build.
 
 Below is a description of the currently available video filters.
 
+@section null
+
+Pass the source unchanged to the output.
+
 @bye