C# 如何从emgu cv中的网络摄像头获取视频流？
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How to get video stream from webcam in emgu cv?
提问by TBT
I'm using emgu cv in c#.
我在 c# 中使用 emgu cv。
I need to know How I can get the video stream from my webcam(default webcam)in emgu cv?
我需要知道如何从 emgu cv 中的网络摄像头（默认网络摄像头）获取视频流？
采纳答案by Shiva
You can use the following code to make an app to capture and display video stream:
您可以使用以下代码制作一个应用程序来捕获和显示视频流：
public class CameraCapture
{
private Capture capture; //takes images from camera as image frames
private bool captureInProgress;
private void ProcessFrame(object sender, EventArgs arg)
{
Image<Bgr, Byte> ImageFrame = capture.QueryFrame(); //line 1
CamImageBox.Image = ImageFrame; //line 2
}
private void Form1_Load(object sender, EventArgs e)
{
if (capture == null)
{
try
{
capture = new Capture();
}
catch (NullReferenceException excpt)
{
MessageBox.Show(excpt.Message);
}
}
if (capture != null)
{
if (captureInProgress)
{ //if camera is getting frames then stop the capture and set button Text
// "Start" for resuming capture
btnStart.Text = "Start!"; //
Application.Idle -= ProcessFrame;
}
else
{
//if camera is NOT getting frames then start the capture and set button
// Text to "Stop" for pausing capture
btnStart.Text = "Stop";
Application.Idle += ProcessFrame;
}
captureInProgress = !captureInProgress;
}
}
}
回答by jlew
Not sure what you want to do with the data, but this will get you a single frame from the camera (and display it in a pictureBox on a WinForm)
不确定你想用数据做什么，但这会让你从相机中获得一个帧（并将它显示在 WinForm 上的图片框中）
private void Form1_Load(object sender, EventArgs e)
{
var capture = new Emgu.CV.Capture();
using (var nextFrame = capture.QueryFrame())
{
if (nextFrame != null)
{
pictureBox1.Image = nextFrame.ToBitmap();
}
}
}
