Fix typos

Author: Wovchena

demos/background_subtraction_demo/cpp_gapi/main.cpp

@@ -6,7 +6,7 @@
 #include <utils/args_helper.hpp>
 #include <utils_gapi/stream_source.hpp>
 #include <utils/config_factory.h>
-#include <utils/ocv_common.h>
+#include <utils/ocv_common.hpp>
 
 #include <opencv2/gapi/streaming/cap.hpp>
 #include <opencv2/gapi/imgproc.hpp>
@@ -161,7 +161,7 @@ int main(int argc, char *argv[]) {
         cv::Size graphSize{static_cast<int>(frame_size.width / 4), 60};
         Presenter presenter(FLAGS_u, frame_size.height - graphSize.height - 10, graphSize);
 
-        LayzyVideoWriter videoWriter{FLAGS_o, cap->fps(), FLAGS_limit};
+        LazyVideoWriter videoWriter{FLAGS_o, cap->fps(), FLAGS_limit};
 
         bool isStart = true;
         uint64_t curr_frame_num = 0;

demos/human_pose_estimation_demo/cpp/main.cpp

@@ -325,9 +325,7 @@ int main(int argc, char *argv[]) {
             renderMetrics.update(renderingStart);
             metrics.update(result->metaData->asRef<ImageMetaData>().timeStamp,
                 outFrame, { 10, 22 }, cv::FONT_HERSHEY_COMPLEX, 0.65);
-            if (videoWriter.isOpened() && (FLAGS_limit == 0 || framesProcessed <= FLAGS_limit - 1)) {
-                videoWriter.write(outFrame);
-            }
+            videoWriter.write(outFrame);
             if (!FLAGS_no_show) {
                 cv::imshow("Human Pose Estimation Results", outFrame);
                 //--- Updating output window

demos/interactive_face_detection_demo/cpp_gapi/main.cpp

@@ -437,7 +437,7 @@ int main(int argc, char *argv[]) {
         stream.setSource<custom::CommonCapSrc>(cap);
 
         /** Save output result **/
-        LazyVideoWriter videoWriter{FLAGS_o, cap->fsp(), FLAGS_limit};
+        LazyVideoWriter videoWriter{FLAGS_o, cap->fps(), FLAGS_limit};
 
         bool isStart = true;
         const auto startTime = std::chrono::steady_clock::now();

demos/smart_classroom_demo/cpp/main.cpp

@@ -37,7 +37,7 @@ class Visualizer {
     cv::Mat top_persons_;
     const bool enabled_;
     const int num_top_persons_;
-    cv::VideoWriter& writer_;
+    LazyVideoWriter writer_;
     float rect_scale_x_;
     float rect_scale_y_;
     static int const max_input_width_ = 1920;
@@ -49,7 +49,7 @@ class Visualizer {
     static int const margin_size_ = 5;
 
 public:
-    Visualizer(bool enabled, cv::VideoWriter& writer, int num_top_persons) :
+    Visualizer(bool enabled, const LazyVideoWriter& writer, int num_top_persons) :
         enabled_(enabled), num_top_persons_(num_top_persons), writer_(writer), rect_scale_x_(0), rect_scale_y_(0) {
         if (!enabled_) {
             return;
@@ -89,12 +89,12 @@ class Visualizer {
         }
     }
 
-    void Show(size_t framesProcessed) const {
+    void Show(size_t framesProcessed) {
         if (enabled_) {
             cv::imshow(main_window_name_, frame_);
         }
 
-        writer_ << frame_;
+        writer_.write(frame_);
     }
 
     void DrawCrop(cv::Rect roi, int id, const cv::Scalar& color) const {