From 8d95c91805bd5b6c983187e517c92e68cda7ea46 Mon Sep 17 00:00:00 2001
From: Manfred Georg <manfred.georg@gmail.com>
Date: Fri, 26 Sep 2014 09:44:25 -0700
Subject: [PATCH] set ffmpeg mutex to NULL on destruction.

---
 modules/videoio/src/cap_ffmpeg_impl.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/videoio/src/cap_ffmpeg_impl.hpp b/modules/videoio/src/cap_ffmpeg_impl.hpp
index 4a3b029b8..02aeec0aa 100644
--- a/modules/videoio/src/cap_ffmpeg_impl.hpp
+++ b/modules/videoio/src/cap_ffmpeg_impl.hpp
@@ -493,6 +493,7 @@ static int LockCallBack(void **mutex, AVLockOp op)
             localMutex->destroy();
             free(localMutex);
             localMutex = NULL;
+            *mutex = NULL;
         break;
     }
     return 0;