Check for camera disconnection / down

asked 2013-11-12 00:51:28 -0600

swejnc
1 ●1

updated 2013-11-12 05:00:23 -0600

berak
32993 ●7 ●81 ●312

I was capturing video from camera, I need to know if the camera is disconnected or down, is there a way to check?

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answered 2013-11-12 04:39:52 -0600

Pedro Batista

2213 ●5 ●18 ●42 https://lnkd.in/bw9XGH8

updated 2013-11-12 04:42:34 -0600

Try to read frame, if you can't it probably means that the camera was disconnected.

VideoCapture cap;
Mat frame;

cap.open(0);

    if(!cap.read(frame))
        {
            cout << "failed to read frame";
            return;
        }

There's also a cap.IsOpened() method that returns 1 or 0, if the VideoCapture object is opened or not.

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I need to check for more than one time, let say every loop of capturing, I need to know when the camera is down. Once the camera works, IsOpened() always return true even the camera goes down after that. If I use cap.open(0) in a loop, it cause memory leak.