bugfix

src/main.cpp

@@ -42,7 +42,7 @@ void test_yolo()
 
     std::shared_ptr<GNode::DrawNode> draw_node     = std::make_shared<GNode::DrawNode>("draw");
     std::shared_ptr<GNode::RecordNode> record_node = std::make_shared<GNode::RecordNode>("record");
-    record_node->set_record_path("result/");
+    record_node->set_record_path("result/result.mp4");
     record_node->set_fps(25);
     record_node->set_fourcc(cv::VideoWriter::fourcc('M', 'J', 'P', 'G'));