Fixed segmentation fault error in TRACK_vot::getNextFrame()

modules/datasets/samples/track_vot.cpp

@@ -82,8 +82,8 @@ int main(int argc, char *argv[])
 	for (int i = 0; i < dataset->getDatasetLength(datasetID); i++)
 	{
 		Mat frame;
-		dataset->getNextFrame(frame);
-
+		if (!dataset->getNextFrame(frame))
+			break;
 		//Draw Ground Truth BB
 		vector <Point2d> gtPoints =  dataset->getGT();
 		for (int j = 0; j < (int)(gtPoints.size()-1); j++)

modules/datasets/src/track_vot.cpp

@@ -210,7 +210,10 @@ namespace cv
 
 		bool  TRACK_votImpl::getNextFrame(Mat &frame)
 		{
-			frame = imread(data[activeDatasetID - 1][frameCounter]->imagePath);
+			if (frameCounter >= (int)data[activeDatasetID - 1].size())
+				return false;
+			string imgPath = data[activeDatasetID - 1][frameCounter]->imagePath;
+			frame = imread(imgPath);
 			frameCounter++;
 			return !frame.empty();
 		}

modules/tracking/samples/multiTracker_dataset.cpp

@@ -50,7 +50,7 @@ using namespace std;
 using namespace cv;
 using namespace cv::datasets;
 
-#define NUM_TEST_FRAMES 100
+#define NUM_TEST_FRAMES 1000
 
 static Mat image;
 static bool paused;
@@ -170,10 +170,8 @@ int main(int argc, char *argv[])
 			//Time measurment
 			int64 e1 = getTickCount();
 			if (initialized){
-				dataset->getNextFrame(frame);
-				if (frame.empty()){
+				if (!dataset->getNextFrame(frame))
 					break;
-				}
 				frame.copyTo(image);
 			}
 

modules/tracking/samples/tracker_dataset.cpp

@@ -169,10 +169,8 @@ int main(int argc, char *argv[])
 			//Time measurment
 			int64 e1 = getTickCount();
 			if (initialized){
-				dataset->getNextFrame(frame);
-				if (frame.empty()){
+				if (!dataset->getNextFrame(frame))
 					break;
-				}
 				frame.copyTo(image);
 			}