VideoCapture up 100 % CPU and memory leak

[Archie1978]

Hello, when I use VideoCaptureDevice, I had a 100% CPU and I'd memory leak.

Code:

      cameraCaptureDevice, err := gocv.VideoCaptureDevice(0)
        if err != nil {
                fmt.Fatal("Error device")
        }
        cameraCaptureDevice.Set(gocv.VideoCaptureFrameWidth, 1920)
        cameraCaptureDevice.Set(gocv.VideoCaptureFrameHeight, 1080)
       <- time.After(1000*time.Minute)

My stat after 6 seconde 10542 me 20 0 1468668 57088 24408 S 100.0%CPU 3.0 %RAM 0:06.52 Program_motherb

My stat 2 hour 10542 me 20 0 1534780 157760 24824 S 106.7 %CPU 8.3 %RAM 116:09.85 Program_motherb

Do you have solution for cpu and memory ?

[golubaca]

Yes, use that frames... OpenCV creates buffer for unprocessed frames, and you are just expanding that buffer without using it.

[Archie1978]

Ah ok, do we know the size of the buffer and stop video acquisition? See even reduce the reduce the size of the acquisition?

[Archie1978]

So I make this code:

    cameraCaptureDevice, err := gocv.VideoCaptureDevice(0)
    if err != nil {
            return nil, err
    }
    mat := gocv.NewMat()
    cameraCaptureDevice.Set(gocv.VideoCaptureFrameWidth, 1920)
    cameraCaptureDevice.Set(gocv.VideoCaptureFrameHeight, 1080)
    cameraCaptureDevice.Set(gocv.VideoCaptureFPS,1)

    for {
            err:=cameraCaptureDevice.Read(&mat)
            fmt.Println("camera",err)
    }
   <- time.After(1000*time.Minute)

The CPU capture is down to 40% when disabled loop :)

But when I created loop for reading, I had more 1 frame by second and Memory goes up always :(

[Archie1978]

I tryed this code but I had memory leak:

    stop:=false
    go func(){
            for {
                    if !stop {
                            cameraCaptureDevice.Read(&mat)
                    }else{
                            return
                    }
            }
    }()
    <-time.After(120*time.Minute)
    stop=true
    <-time.After(2*time.Second)
    cameraCaptureDevice.Close()
    <-time.After(999*time.Minute)

[deadprogram]

Sorry, I personally cannot tell what problem might be happening without seeing more of the code.

Most of the time, people's troubles are related to not calling Close() on any Mat that you have created, especially those created inside of a loop. This is why we use the profiler as part of our CI system to try to catch such issues. You can learn more about it and how to apply to testing your own code here: https://github.com/hybridgroup/gocv/blob/release/README.md#profiling