unable to Set FPS

[ghost]

Description

unable to change frame per second value.

Steps to Reproduce

// open webcam                                                
webcam, err = gocv.OpenVideoCapture(deviceID)
if err != nil {
    fmt.Printf("Error opening capture device: %v\n", deviceID)
    return
}
defer webcam.Close()

webcam.Set(5, 10)
log.Println(webcam.Get(5))

output

30

Your Environment

• Operating System and version: Ubuntu 20.04.2 LTS - 64bit
• OpenCV version used: opencv lib version: 4.5.3
• How did you install OpenCV? followed this -> https://pkg.go.dev/gocv.io/x/gocv#readme-ubuntu-linux
• GoCV version used: gocv version: 0.28.0
• Go version: go1.16.3
• Did you run the env.sh or env.cmd script before trying to go run or go build? No

[xiaoxfan]

same problem

[wgjtyu]

#913 same problem

[jiekechoo]

You should use webca.Grab(webcam.Get(gocv.VideoCaptureFPS) - yourFps) to skip frames before calling webcam.Read()