diff --git a/src/main/java/org/jdetect/CameraApp.java b/src/main/java/org/jdetect/CameraApp.java
index 0985d92..1d84936 100644
--- a/src/main/java/org/jdetect/CameraApp.java
+++ b/src/main/java/org/jdetect/CameraApp.java
@@ -48,7 +48,6 @@ public class CameraApp extends JFrame {
     private List<String> outputLayers;
     private boolean detectionEnabled = true;
     private boolean modelLoaded = false;
-    private final int frameCount = 0;
     private long lastFpsUpdate = System.currentTimeMillis();
 
     public CameraApp() {
@@ -396,18 +395,7 @@ public class CameraApp extends JFrame {
     }
 
     private void downloadFile(String urlString, String fileName, DownloadProgressBar progressDialog) throws IOException {
-        URL url = new URL(urlString);
-        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
-        connection.setRequestProperty("User-Agent", "Mozilla/5.0");
-
-        // Handle redirects
-        int status = connection.getResponseCode();
-        if (status == HttpURLConnection.HTTP_MOVED_TEMP ||
-                status == HttpURLConnection.HTTP_MOVED_PERM ||
-                status == HttpURLConnection.HTTP_SEE_OTHER) {
-            String newUrl = connection.getHeaderField("Location");
-            connection = (HttpURLConnection) new URL(newUrl).openConnection();
-        }
+        final HttpURLConnection connection = getHttpURLConnection(urlString);
 
         int totalSize = connection.getContentLength();
 
@@ -432,6 +420,22 @@ public class CameraApp extends JFrame {
         }
     }
 
+    private static HttpURLConnection getHttpURLConnection(String urlString) throws IOException {
+        URL url = new URL(urlString);
+        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+        connection.setRequestProperty("User-Agent", "Mozilla/5.0");
+
+        // Handle redirects
+        int status = connection.getResponseCode();
+        if (status == HttpURLConnection.HTTP_MOVED_TEMP ||
+                status == HttpURLConnection.HTTP_MOVED_PERM ||
+                status == HttpURLConnection.HTTP_SEE_OTHER) {
+            String newUrl = connection.getHeaderField("Location");
+            connection = (HttpURLConnection) new URL(newUrl).openConnection();
+        }
+        return connection;
+    }
+
     private void updateFrame() {
         if (cap == null || !cap.isOpened()) {
             return;
@@ -468,9 +472,6 @@ public class CameraApp extends JFrame {
 
         SwingUtilities.invokeLater(() -> {
             BufferedImage bufferedImage = matToBufferedImage(frame);
-            if (bufferedImage == null) {
-                return;
-            }
 
             ImageIcon imageIcon = new ImageIcon(bufferedImage);