From d06c73861dece3ff7566eb857fc63225215b7b17 Mon Sep 17 00:00:00 2001
From: Ariel Elkin <arielelkin@gmail.com>
Date: Mon, 25 Aug 2014 15:13:13 -0300
Subject: [PATCH] Doc: update video processing tutorial code for OpenCV v2.4.9
 and v3a

---
 doc/tutorials/ios/video_processing/video_processing.rst | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/doc/tutorials/ios/video_processing/video_processing.rst b/doc/tutorials/ios/video_processing/video_processing.rst
index eb5da5b111..9e6905be40 100644
--- a/doc/tutorials/ios/video_processing/video_processing.rst
+++ b/doc/tutorials/ios/video_processing/video_processing.rst
@@ -199,11 +199,16 @@ From here you can start processing video frames. For example the following snipp
     {
         // Do some OpenCV stuff with the image
         Mat image_copy;
-        cvtColor(image, image_copy, CV_BGRA2BGR);
+        cvtColor(image, image_copy, COLOR_BGR2GRAY);
 
         // invert image
         bitwise_not(image_copy, image_copy);
-        cvtColor(image_copy, image, CV_BGR2BGRA);
+
+        //Convert BGR to BGRA (three channel to four channel)
+        Mat bgr;
+        cvtColor(image_copy, bgr, COLOR_GRAY2BGR);
+
+        cvtColor(bgr, image, COLOR_BGR2BGRA);
     }