Fix cross-platform compatibility and add error handling

Co-authored-by: kr4phy <168257476+kr4phy@users.noreply.github.com>

cli.py

@@ -27,19 +27,34 @@ def main():
     print(f"Output will be saved to: {output_path}")
     print("\nProcessing...")
     
-    success = process_video(input_path, output_path)
-    
-    if success:
-        print("\n✓ Video processing completed successfully!")
-        print(f"✓ Result saved to: {output_path}")
+    try:
+        success = process_video(input_path, output_path)
         
-        if os.path.exists(output_path):
-            size = os.path.getsize(output_path)
-            print(f"✓ File size: {size:,} bytes")
-    else:
-        print("\n✗ Video processing failed!")
+        if success:
+            print("\n✓ Video processing completed successfully!")
+            print(f"✓ Result saved to: {output_path}")
+            
+            if os.path.exists(output_path):
+                size = os.path.getsize(output_path)
+                print(f"✓ File size: {size:,} bytes")
+        else:
+            print("\n✗ Video processing failed!")
+            sys.exit(1)
+    except Exception as e:
+        print(f"\n✗ Error during processing: {e}")
+        import traceback
+        traceback.print_exc()
         sys.exit(1)
 
 
 if __name__ == "__main__":
-    main()
+    try:
+        main()
+    except KeyboardInterrupt:
+        print("\n\nOperation cancelled by user.")
+        sys.exit(0)
+    except Exception as e:
+        print(f"\n✗ Unexpected error: {e}")
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)

create_sample_images.py

@@ -4,6 +4,7 @@ Create sample images to demonstrate lane detection
 import cv2
 import numpy as np
 import os
+import tempfile
 
 
 def create_sample_frames():
@@ -13,8 +14,9 @@ def create_sample_frames():
     from create_test_video import create_test_video
     from lane_detection import process_video
     
-    input_video = "/tmp/demo_input.mp4"
-    output_video = "/tmp/demo_output.mp4"
+    temp_dir = tempfile.gettempdir()
+    input_video = os.path.join(temp_dir, "demo_input.mp4")
+    output_video = os.path.join(temp_dir, "demo_output.mp4")
     
     # Create a test video with clear lanes
     print("Creating demo video...")
@@ -39,7 +41,7 @@ def create_sample_frames():
     
     if ret:
         # Save the frame
-        output_path = "/tmp/lane_detection_demo.png"
+        output_path = os.path.join(temp_dir, "lane_detection_demo.png")
         cv2.imwrite(output_path, frame)
         print(f"✓ Sample frame saved to: {output_path}")
         print(f"  Frame shows original (left) and lane detection (right)")
@@ -48,7 +50,7 @@ def create_sample_frames():
         height, width = frame.shape[:2]
         scale = 0.5
         small_frame = cv2.resize(frame, (int(width * scale), int(height * scale)))
-        small_output_path = "/tmp/lane_detection_demo_small.png"
+        small_output_path = os.path.join(temp_dir, "lane_detection_demo_small.png")
         cv2.imwrite(small_output_path, small_frame)
         print(f"✓ Smaller version saved to: {small_output_path}")
     else:

quickstart.py

@@ -5,6 +5,7 @@ Creates a test video, processes it, and verifies the output
 """
 import os
 import sys
+import tempfile
 
 
 def main():
@@ -35,8 +36,9 @@ def main():
     print("2. Creating test video...")
     from create_test_video import create_test_video
     
-    input_video = "/tmp/quickstart_input.mp4"
-    output_video = "/tmp/quickstart_output.mp4"
+    temp_dir = tempfile.gettempdir()
+    input_video = os.path.join(temp_dir, "quickstart_input.mp4")
+    output_video = os.path.join(temp_dir, "quickstart_output.mp4")
     
     create_test_video(input_video, duration_sec=2, fps=15)
     print()
@@ -77,4 +79,10 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    try:
+        main()
+    except Exception as e:
+        print(f"\n✗ Error: {e}")
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)