From dd482c6a2936b57d4b588eb73832b9a7923f9fe7 Mon Sep 17 00:00:00 2001
From: jacobdang <kangdang@gmail.com>
Date: Sat, 17 Dec 2016 21:48:29 +0800
Subject: [PATCH] bug fix for #7846

---
 samples/gpu/video_writer.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/samples/gpu/video_writer.cpp b/samples/gpu/video_writer.cpp
index 80d2cfc47b..6b9cca3dfa 100644
--- a/samples/gpu/video_writer.cpp
+++ b/samples/gpu/video_writer.cpp
@@ -11,6 +11,7 @@
 #include "opencv2/cudacodec.hpp"
 #include "opencv2/highgui.hpp"
 
+using namespace cv;
 int main(int argc, const char* argv[])
 {
     if (argc != 2)