Windows | Technology Tutorials

This is the code we developed in Video Lesson #6 showing how to launch a webcam quicker and with less delay in OpenCV running on windows. The video above explains the code step by step, but for your convenience, I include the code below.

import cv2
print(cv2.__version__)
width=1280
height=720
cam=cv2.VideoCapture(1,cv2.CAP_DSHOW)
cam.set(cv2.CAP_PROP_FRAME_WIDTH, width)
cam.set(cv2.CAP_PROP_FRAME_HEIGHT,height)
cam.set(cv2.CAP_PROP_FPS, 30)
cam.set(cv2.CAP_PROP_FOURCC,cv2.VideoWriter_fourcc(*'MJPG'))
while True:
    ignore,  frame = cam.read()
    cv2.imshow('my WEBcam', frame)
    cv2.moveWindow('my WEBcam',0,0)
    if cv2.waitKey(1) & 0xff ==ord('q'):
        break
cam.release()

import cv2

print(cv2.__version__)

width=1280

height=720

cam=cv2.VideoCapture(1,cv2.CAP_DSHOW)

cam.set(cv2.CAP_PROP_FRAME_WIDTH, width)

cam.set(cv2.CAP_PROP_FRAME_HEIGHT,height)

cam.set(cv2.CAP_PROP_FPS, 30)

cam.set(cv2.CAP_PROP_FOURCC,cv2.VideoWriter_fourcc(*'MJPG'))

while True:

ignore, frame = cam.read()

cv2.imshow('my WEBcam', frame)

cv2.moveWindow('my WEBcam',0,0)

if cv2.waitKey(1) & 0xff ==ord('q'):

break

cam.release()

In this lesson we show how to move a frame in OpenCV, how to convert a color image to grayscale, and then how to display multiple video windows. For your convenience, I include the code below that we develop in this video.

import cv2
print(cv2.__version__)
cam=cv2.VideoCapture(1)
while True:
    ignore,  frame = cam.read()
    gray=cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
    cv2.imshow('my WEBcam', frame)
    cv2.moveWindow('my WEBcam',0,0)
    cv2.imshow('my grayFrame', gray)
    cv2.moveWindow('my grayFrame',640,0)

    cv2.imshow('my WEBcam2', frame)
    cv2.moveWindow('my WEBcam2',640,480)
    cv2.imshow('my grayFrame2', gray)
    cv2.moveWindow('my grayFrame2',0,480)
    

    if cv2.waitKey(1) & 0xff ==ord('q'):
        break
cam.release()

import cv2

print(cv2.__version__)

cam=cv2.VideoCapture(1)

while True:

ignore, frame = cam.read()

gray=cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)

cv2.imshow('my WEBcam', frame)

cv2.moveWindow('my WEBcam',0,0)

cv2.imshow('my grayFrame', gray)

cv2.moveWindow('my grayFrame',640,0)

cv2.imshow('my WEBcam2', frame)

cv2.moveWindow('my WEBcam2',640,480)

cv2.imshow('my grayFrame2', gray)

cv2.moveWindow('my grayFrame2',0,480)

if cv2.waitKey(1) & 0xff ==ord('q'):

break

cam.release()

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Technology Tutorials

Tag Archives: Windows

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Making The World a Better Place One High Tech Project at a Time. Enjoy!