Implementation of python opencv Capturing Camera and Displaying Content

1. Capture the camera and display it in real time

import cv2
import numpy as np
import pickle
import matplotlib.pyplot as plt
 
cap = cv2.VideoCapture(0)
 
while True:
  ret,frame = cap.read()
  # Our operations on the frame come here
  gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
  # Display the resulting frame
  cv2.imshow('frame',gray)
  if cv2.waitKey(1) & 0xFF == ord('q'):
    break
 
# When everything done, release the capture
cap.release()
cv2.destroyAllWindows() 

2. Capture pictures from the camera

import cv2
import numpy as np
import pickle
import matplotlib.pyplot as plt
 
cap = cv2.VideoCapture(0)
index = 0
while True:
  ret,frame = cap.read()
  # Our operations on the frame come here
  gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
  # Display the resulting frame
  cv2.imshow('frame',gray)
  if cv2.waitKey(1) & 0xFF == ord('p'):
    cv2.imwrite("kk.jpg",frame)
    index = index + 1
  if cv2.waitKey(1) & 0xFF == ord('q'):
    break
 
# When everything done, release the capture
cap.release()
cv2.destroyAllWindows() 

Added: python----Capture images from local cameras and webcams

import cv2

#  Get the local camera 
# folder_path  Storage directory of intercepted pictures 
def get_img_from_camera_local(folder_path):
  cap = cv2.VideoCapture(0)
  i = 1
  while True:
    ret, frame = cap.read()
    cv2.imshow("capture", frame)
    print str(i)
    cv2.imwrite(folder_path + str(i) + '.jpg', frame) #  Store as an image 
    if cv2.waitKey(1) & 0xFF == ord('q'):
      break
    i += 1
  cap.release()
  cv2.destroyAllWindows()

#  Get webcam, format: rtsp://username:pwd@ip/
# folder_path  Storage directory of intercepted pictures 
def get_img_from_camera_net(folder_path):
  cap = cv2.VideoCapture('rtsp://username:pwd@ip/')
  i = 1
  while True:
    ret, frame = cap.read()
    cv2.imshow("capture", frame)
    print str(i)
    cv2.imwrite(folder_path + str(i) + '.jpg', frame) #  Store as an image 
    if cv2.waitKey(1) & 0xFF == ord('q'):
      break
    i += 1
  cap.release()
  cv2.destroyAllWindows()

#  Test 
if __name__ == '__main__':
  folder_path = 'D:\\img_from_camera\\'
  get_img_from_camera_local(folder_path)