From: Nikita Manovich <nikita.manovich@gmail.com>
Date: Wed, 10 Jul 2013 13:43:47 +0000 (+0400)
Subject: Fixed VideoCapture::open() does not release previous capture sources (Bug #3150).
X-Git-Tag: accepted/tizen/6.0/unified/20201030.111113~3851^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=21211308d0afec717f987b7d08bfa8fa391514a4;p=platform%2Fupstream%2Fopencv.git

Fixed VideoCapture::open() does not release previous capture sources (Bug #3150).

VideoCapture didn't call release method and just ignored the new capture sources.
OpenCV documentation:
  bool VideoCapture::open(const string& filename);
  bool VideoCapture::open(int device);

The methods first call VideoCapture::release() to close the already opened file or camera.
---

diff --git a/modules/highgui/src/cap.cpp b/modules/highgui/src/cap.cpp
index a76cb42..ac3d658 100644
--- a/modules/highgui/src/cap.cpp
+++ b/modules/highgui/src/cap.cpp
@@ -490,14 +490,14 @@ VideoCapture::~VideoCapture()
 
 bool VideoCapture::open(const String& filename)
 {
-    if (!isOpened())
+    if (isOpened()) release();
     cap = cvCreateFileCapture(filename.c_str());
     return isOpened();
 }
 
 bool VideoCapture::open(int device)
 {
-    if (!isOpened())
+    if (isOpened()) release();
     cap = cvCreateCameraCapture(device);
     return isOpened();
 }