From e45f46c102b5b7c3ee1434bd546e6aaeca812928 Mon Sep 17 00:00:00 2001
From: Tim Zeuner <zeunerti74726@th-nuernberg.de>
Date: Wed, 30 Nov 2022 18:55:20 +0100
Subject: [PATCH] Proper error message, Check if grab() was successfull

---
 AutonomousMode/Input/input.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/AutonomousMode/Input/input.cpp b/AutonomousMode/Input/input.cpp
index ca704d2..e2c5173 100644
--- a/AutonomousMode/Input/input.cpp
+++ b/AutonomousMode/Input/input.cpp
@@ -39,17 +39,19 @@ Mat Input::readWebcam()
     Mat image;
 
     if(!cap.isOpened()) {
-        cout << "Fehler";
+        cout << "Video capture not opened" << std::endl;
         return Mat();
     }
 
-    cap.grab();
+    if(!cap.grab()) {
+        cout << "Could not grab frame from camera" << std::endl;
+        return Mat();
+    }   
     cap.retrieve(image);
-    
     return image;  
 }
 
 void Input::freeWebcam()
 {
     this->cap.release();
-}
\ No newline at end of file
+}