Groupview stereo images and multiple frames

Stereo image and video (multiple frames) mode for groupview app.

applications/groupview/src/main.cpp

@@ -110,7 +110,6 @@ void modeLeftRight(ftl::Configurable *root) {
 	int key;
 
 	Mat show;
-	cv::namedWindow("Cameras", cv::WINDOW_KEEPRATIO | cv::WINDOW_NORMAL);
 	
 	while (ftl::running) {
 		while (!new_frames) {
@@ -124,7 +123,7 @@ void modeLeftRight(ftl::Configurable *root) {
 		mutex.unlock();
 		
 		stack(rgb, show);
-
+		cv::namedWindow("Cameras", cv::WINDOW_KEEPRATIO | cv::WINDOW_NORMAL);
 		cv::imshow("Cameras", show);
 
 		key = cv::waitKey(100);
@@ -197,8 +196,6 @@ void modeFrame(ftl::Configurable *root, int frames=1) {
 	vector<cv::Mat> rgb(sources.size());
 	vector<cv::Mat> depth(sources.size());
 
-	cv::namedWindow("Cameras", cv::WINDOW_KEEPRATIO | cv::WINDOW_NORMAL);
-
 	while (ftl::running) {
 		for (auto s : sources) s->grab(30);
 		for (size_t i = 0; i < sources.size(); i++) {
@@ -207,6 +204,7 @@ void modeFrame(ftl::Configurable *root, int frames=1) {
 		}
 
 		stack(rgb, show);
+		cv::namedWindow("Cameras", cv::WINDOW_KEEPRATIO | cv::WINDOW_NORMAL);
 		cv::imshow("Cameras", show);
 
 		auto key = cv::waitKey(20);
@@ -231,8 +229,6 @@ void modeVideo(ftl::Configurable *root) {
 	vector<cv::Mat> rgb(sources.size());
 	vector<cv::Mat> depth(sources.size());
 
-	cv::namedWindow("Cameras", cv::WINDOW_KEEPRATIO | cv::WINDOW_NORMAL);
-
 	int count = 0;
 	int remaining = 0;
 
@@ -257,6 +253,7 @@ void modeVideo(ftl::Configurable *root) {
 		}
 
 		stack(rgb, show);
+		cv::namedWindow("Cameras", cv::WINDOW_KEEPRATIO | cv::WINDOW_NORMAL);
 		cv::imshow("Cameras", show);
 
 		auto key = cv::waitKey(20);