VideoCapture leaking handles

[opencv-pushbot]

Transferred from http://code.opencv.org/issues/4327

|| Jim Curry on 2015-05-09 17:17
|| Priority: Normal
|| Affected: branch 'master' (3.0-dev)
|| Category: highgui-camera
|| Tracker: Bug
|| Difficulty: 
|| PR: 
|| Platform: x64 / Windows

VideoCapture leaking handles

I am using OpenCV VideoCapture on Win 7-64 with Python 2.7.9 to capture images from several webcams. The code works but leaks handles severely. I have reduced the code to the snippet below and still see the leak. I have tried OpenCV versions 2.4.10 and 3.0.0rc1 and a version from about a year ago. This was originally asked at http://answers.opencv.org/ and I was advised to bring it here. Any ideas on how to correct this would be appreciated. Thanks.

<pre>
import cv2
def webcam():
    n=0
    while n<4:
        cap=cv2.VideoCapture(n)
        cap.release()
        cv2.waitKey(1)
        n=n+1
while True:
    webcam()
</pre>

History

Vadim Pisarevsky on 2015-05-14 18:35

Since you have the hardware configuration where you can reproduce the problem and we don't, I wonder if the problem exists in C++ version as well. I mean, we need to figure out whether it's highgui or python bindings problem
-   Category set to highgui-camera

Jim Curry on 2015-05-16 14:38

The issue does exist in C++ using both 2.4.10 and 3.0.0rc1.

Jim Curry on 2015-06-04 23:34

This issue is now confirmed in 2.4.11 and 3.0.0.

[venkat330]

Any updates or fixes on this bug??/

I am facing same issue under 👍
WIN7 + MINGW WIN32 + opencv2.4.11 / 3.0/2.4.6

Code sample: http://answers.opencv.org/question/68078/possible-memory-leak-cause-videocapture/