diff --git a/README b/README
index 3d09d94..a24409c 100644
--- a/README
+++ b/README
@@ -59,7 +59,7 @@ Examples
 
 ./prpa -f drunk -f sepia -o bar.avi -c MP42 foo.avi
 ./prpa -f blur=50 -f reverse -o bar.avi -c XVID foo.avi
-./prpa -f inlay=1,0,0 -o bar.avi -c XVID foo.avi
+./prpa -f inlay=1,0,0 -o bar.avi -c XVID foo.avi inlayed.avi
 ./prpa -f strictinlay=255,137,42 -o bar.avi -c XVID orig.avi inlayed.avi
 
 time ./prpa -f drunk -f sepia -o bar.avi -c MP42 foo.avi
diff --git a/src/filterSample/rotate.cc b/src/filterSample/rotate.cc
index b6385d9..a611fe0 100644
--- a/src/filterSample/rotate.cc
+++ b/src/filterSample/rotate.cc
@@ -9,7 +9,7 @@ void* Rotate::operator()(void* para)
 
   if (direction_ == 0) // rotate-h
     for (size_t i = 0; i < mat->rows; ++i)
-      for (size_t j = mat->cols / 2 + 1; j > 0; --j)
+      for (size_t j = 0; j < mat->cols / 2; ++j)
       {
         cv::Vec3b tmp = mat->at<cv::Vec3b>(i, j);
         mat->at<cv::Vec3b>(i, j) = mat->at<cv::Vec3b>(i, mat->cols - j - 1);
@@ -17,7 +17,7 @@ void* Rotate::operator()(void* para)
       }
 
   else if (direction_ == 2 || direction_ == -2) // rotate-v
-    for (size_t i = mat->rows / 2 + 1; i > 0; --i)
+    for (size_t i = 0; i < mat->rows / 2; ++i)
       for (size_t j = 0; j < mat->cols; ++j)
       {
         cv::Vec3b tmp = mat->at<cv::Vec3b>(i, j);
diff --git a/src/main.cc b/src/main.cc
index a76029b..900edb9 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -20,7 +20,8 @@ bool parse_cli(Configuration& conf, int argc, char** argv)
     ("help,h", "produce help message")
     ("filter,f", po::value<std::vector<std::string>>(), "apply a filter; "
      "choose between grey, reverse, cartoon, drunk, count, color=B,G,R, sepia,"
-     " blur[=X], merge, interlace, inlay=B,G,R, strictinlay=B,G,R")
+     " blur[=X], rotate-x, rotate-y, merge, interlace, inlay=B,G,R,"
+     " strictinlay=B,G,R")
     ("input-file,i", po::value<std::vector<std::string>>(), "file to treat")
     ("output,o", po::value<std::string>(), "output file")
     ("codec,c", po::value<std::string>(), "output codec")