turning_on_webcam.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "074d77ab",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "all good\n"
     ]
    }
   ],
   "source": [
    "# import the opencv library\n",
    "import cv2\n",
    "\n",
    "\n",
    "# define a video capture object\n",
    "cap = cv2.VideoCapture(0) \n",
    "if cap is None or not cap.isOpened():\n",
    "    print('Warning: unable to open video source: ', 0)\n",
    "else:\n",
    "    print('all good')\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "203c5253",
   "metadata": {},
   "outputs": [
    {
     "ename": "error",
     "evalue": "OpenCV(4.6.0) C:\\b\\abs_d8ltn27ay8\\croot\\opencv-suite_1676452046667\\work\\modules\\highgui\\src\\window.cpp:967: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'\n",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31merror\u001b[0m                                     Traceback (most recent call last)",
      "Cell \u001b[1;32mIn[3], line 3\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;28;01mwhile\u001b[39;00m \u001b[38;5;28;01mTrue\u001b[39;00m:\n\u001b[0;32m      2\u001b[0m     ret, frame \u001b[38;5;241m=\u001b[39m cap\u001b[38;5;241m.\u001b[39mread()\n\u001b[1;32m----> 3\u001b[0m     \u001b[43mcv2\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mimshow\u001b[49m\u001b[43m(\u001b[49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[38;5;124;43mframe\u001b[39;49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[43mframe\u001b[49m\u001b[43m)\u001b[49m\n\u001b[0;32m      4\u001b[0m     \u001b[38;5;28;01mif\u001b[39;00m cv2\u001b[38;5;241m.\u001b[39mwaitKey(\u001b[38;5;241m1\u001b[39m) \u001b[38;5;241m&\u001b[39m \u001b[38;5;241m0xFF\u001b[39m \u001b[38;5;241m==\u001b[39m \u001b[38;5;28mord\u001b[39m(\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mq\u001b[39m\u001b[38;5;124m'\u001b[39m):\n\u001b[0;32m      5\u001b[0m         \u001b[38;5;28;01mbreak\u001b[39;00m\n",
      "\u001b[1;31merror\u001b[0m: OpenCV(4.6.0) C:\\b\\abs_d8ltn27ay8\\croot\\opencv-suite_1676452046667\\work\\modules\\highgui\\src\\window.cpp:967: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'\n"
     ]
    }
   ],
   "source": [
    "while True:\n",
    "    ret, frame = cap.read()\n",
    "    cv2.imshow('frame', frame)\n",
    "    if cv2.waitKey(1) & 0xFF == ord('q'):\n",
    "        break\n",
    "cap.release()\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "63ff184b",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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