diff --git a/pose_detector_window.py b/pose_detector_window.py
index 2975637..b282d79 100644
--- a/pose_detector_window.py
+++ b/pose_detector_window.py
@@ -666,10 +666,12 @@ def main():
     )
 
     # Essential arguments
-    parser.add_argument('--input', '-i', required=True,
-                      help='Input source (path to video file or URL)')
-    parser.add_argument('--output', '-o', required=True,
-                      help='Output JSON file to save pose data')
+    parser.add_argument('--input', '-i', required=False,
+                      help='Input source (path to video file, URL, or camera index like "0" for webcam)')
+    parser.add_argument('--camera', '-c', action='store_true',
+                      help='Use default webcam (camera 0) as input source')
+    parser.add_argument('--output', '-o', required=False,
+                      help='Output JSON file to save pose data (optional for camera mode)')
     parser.add_argument('--model', type=str, default='n', choices=['n', 's', 'm', 'l', 'x'],
                       help='YOLOv11 model size (n=nano, s=small, m=medium, l=large, x=xlarge)')
     parser.add_argument('--device', type=str, default='auto',
@@ -693,6 +695,19 @@ def main():
 
     args = parser.parse_args()
 
+    # Handle camera/input source logic
+    if args.camera:
+        input_source = 0  # Default webcam
+        print("📷 Using default webcam (camera 0)")
+    elif args.input:
+        input_source = args.input
+    else:
+        parser.error("Either --input/-i or --camera/-c must be specified")
+
+    # Output is optional for camera mode
+    if not args.output and not args.camera:
+        parser.error("--output/-o is required when not using camera mode")
+
     # Validate filter window size
     if args.filter_window % 2 == 0:
         args.filter_window += 1
@@ -701,8 +716,8 @@ def main():
     print("\n" + "="*50)
     print("📹 JD-Clone YOLOv11 Pose Detector")
     print("="*50)
-    print(f"• Input: {args.input}")
-    print(f"• Output: {args.output}")
+    print(f"• Input: {input_source if not args.camera else 'Webcam (camera 0)'}")
+    print(f"• Output: {args.output if args.output else 'None (preview only)'}")
     print(f"• Model: YOLOv11-{args.model}")
     print(f"• Device: {args.device}")
     print(f"• Preview: {'Disabled' if args.no_preview else 'Enabled'}")
@@ -714,7 +729,7 @@ def main():
     # Run pose detection
     try:
         run_pose_detection(
-            input_source=args.input,
+            input_source=input_source,
             output_file=args.output,
             normalize=not args.no_normalize,
             detection_threshold=args.detection_threshold,