From e0d64df76351f97c1dea5babb09954afbaea63a7 Mon Sep 17 00:00:00 2001
From: Ilya Lavrenov <ilya.lavrenov@itseez.com>
Date: Thu, 16 Jun 2016 12:53:59 +0300
Subject: [PATCH] fixed -Wunused-result warning

---
 modules/highgui/src/cap_ffmpeg_impl.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/highgui/src/cap_ffmpeg_impl.hpp b/modules/highgui/src/cap_ffmpeg_impl.hpp
index dc3e10d490..da05bde324 100644
--- a/modules/highgui/src/cap_ffmpeg_impl.hpp
+++ b/modules/highgui/src/cap_ffmpeg_impl.hpp
@@ -2287,7 +2287,8 @@ bool OutputMediaStream_FFMPEG::open(const char* fileName, int width, int height,
     #if LIBAVFORMAT_BUILD < CALC_FFMPEG_VERSION(53, 2, 0)
         av_write_header(oc_);
     #else
-        avformat_write_header(oc_, NULL);
+        if (avformat_write_header(oc_, NULL) != 0)
+            return false;
     #endif
 
     return true;