Fix recv_raw_column.py height mismatch and update script paths in docs

- Fixed HEIGHT from 480 to 640 to match actual videotestsrc output
- Added DEBUG flag to control debug output visibility
- Added cv2.namedWindow() for proper window initialization
- Updated all Python script references in markdown files to scripts/ folder
- Updated network_guide.md with correct frame dimensions and Python receiver option

scripts/recv_raw_column.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+# /// script
+# requires-python = "<=3.10"
+# dependencies = [
+#   "opencv-python",
+#   "numpy",
+# ]
+# ///
+
+import socket
+import numpy as np
+import cv2
+
+# Debug flag - set to True to see frame reception details
+DEBUG = False
+
+# Stream parameters (match your GStreamer sender)
+WIDTH = 1
+HEIGHT = 640  # Default videotestsrc height
+CHANNELS = 3
+FRAME_SIZE = WIDTH * HEIGHT * CHANNELS  # bytes
+
+UDP_IP = "0.0.0.0"
+UDP_PORT = 5000
+
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+sock.bind((UDP_IP, UDP_PORT))
+
+print(f"Receiving raw {WIDTH}x{HEIGHT} RGB frames on UDP port {UDP_PORT}")
+if DEBUG:
+    print(f"Expected frame size: {FRAME_SIZE} bytes")
+
+cv2.namedWindow("Raw Column Stream", cv2.WINDOW_NORMAL)
+
+frame_count = 0
+while True:
+    data, addr = sock.recvfrom(65536)
+    
+    if len(data) != FRAME_SIZE:
+        if DEBUG:
+            print(f"Received {len(data)} bytes (expected {FRAME_SIZE}), skipping...")
+        continue
+    
+    if DEBUG:
+        frame_count += 1
+        if frame_count % 30 == 0:
+            print(f"Received {frame_count} frames")
+
+    frame = np.frombuffer(data, dtype=np.uint8).reshape((HEIGHT, WIDTH, CHANNELS))
+
+    # scale for visibility
+    frame_large = cv2.resize(
+        frame, (200, HEIGHT), interpolation=cv2.INTER_NEAREST
+    )
+
+    cv2.imshow("Raw Column Stream", frame_large)
+
+    if cv2.waitKey(1) == 27:  # ESC to quit
+        break
+
+cv2.destroyAllWindows()