Hello,
is there a way to check if webcam is busy before taking an image? Python.exe would crash if camera is in use and following code is running
Python code:
from cv2 import *
while True:
#need to check here if camera is busy
cam = VideoCapture(0)
s, img = cam.read()
if s: # frame captured without any errors
imwrite("filename.jpg",img) #save image
Basically what you need to do before reading an image from a cam element.
VideoCapture cap(0); // open the default camera
if(!cap.isOpened()) // check if we succeeded
return -1;
This code will check if the cam opening actually worked. If the camera is busy, it will not get opened, since access isn't allowed, giving you a false for an opened camera socket.
Can you identify exactly at which command it crashes?
Try this:
You are actually doing my suggestion, but yeah it seems you don't have succeed in getting the videoCapture class. Are u sure that you have all the correct libraries included?
Asked: 2013-07-04 05:00:43 -0600
Seen: 5,343 times
Last updated: Jul 04 '13
