那句话是定义显示视频的位置
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;
using LzDirectShow;
namespace Capture
{
public partial class Form2 : Form
{
private bool firstActive; // 第一次激活窗口
private ArrayList capDevices; // 视频设备列表
private string fileName; // 保存视频avi文件
private IBaseFilter capFilter; // 视频设备的 filterinfo
private IGraphBuilder graphBuilder; // graphBuilder接口
private ICaptureGraphBuilder2 capGraph; // 捕捉Graph接口
private IVideoWindow videoWin; // 视频窗口界面
private IMediaControl mediaCtrl; // 媒体控制接口
private IMediaEventEx mediaEvt; // 媒体事件接口
private System.Windows.Forms.Button okButton;
private System.Windows.Forms.Button cancelButton;
/// <summary> 必需的设计器变量. </summary>
private System.ComponentModel.Container components = null;
private const int WM_GRAPHNOTIFY = 0x00008001; // 消息从图
private const int WS_CHILD = 0x40000000; // 视频窗口的属性
private const int WS_CLIPCHILDREN = 0x02000000;
private const int WS_CLIPSIBLINGS = 0x04000000;
public Form2()
{
InitializeComponent();
ListViewItem item = null;
//foreach (DsDevice d in devs)
//{
// item = new ListViewItem(d.Name);
// item.Tag = d;
// deviceListVw.Items.Add(item);
//}
}
private void Stop_Click(object sender, EventArgs e)
{
if (capGraph == null)
return;
Close();
}
private void Form2_Activated(object sender, EventArgs e)
{
if (firstActive) return;
firstActive = true;
if (!DsUtils.IsCorrectDirectXVersion())
{
MessageBox.Show(this, "DirectX 8.1 NOT installed!", "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
this.Close(); return;
}
if (!DsDev.GetDevicesOfCat(FilterCategory.VideoInputDevice, out capDevices))
{
MessageBox.Show(this, "No video capture devices found!", "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
this.Close(); return;
}
SaveFileDialog sd = new SaveFileDialog();
sd.FileName = @"CaptureNET.avi";
sd.Title = "Save Video Stream as...";
sd.Filter = "Video file (*.avi)|*.avi";
sd.FilterIndex = 1;
if (sd.ShowDialog() != DialogResult.OK)
{
//this.Close(); return;
}
fileName = sd.FileName;
DsDevice dev = null;
if (capDevices.Count == 1)
dev = capDevices[0] as DsDevice;
else
{
DeviceSelector selector = new DeviceSelector(capDevices);
selector.ShowDialog(this);
dev = selector.SelectedDevice;
}
if (dev == null)
{
this.Close(); return;
}
if (!StartupVideo(dev.Mon))
this.Close();
this.Text = "- capturing -";
}
--------------------编程问答--------------------
/// <summary>
/// Luoz:start all the inte易做图ces, graphs and preview window
/// </summary>
bool StartupVideo(IMoniker mon)
{
int hr;
try
{
if (!CreateCaptureDevice(mon))
return false;
if (!GetInte易做图ces())
return false;
if (!SetupGraph())
return false;
if (!SetupVideoWindow())
return false;
#if DEBUG
//DsROT.AddGraphToRot(graphBuilder, out rotCookie); // graphBuilder capGraph
#endif
hr = mediaCtrl.Run();
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
return true;
}
catch (Exception ee)
{
MessageBox.Show(this, "Could not start video stream\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return false;
}
}
/// <summary>
/// Luoz: 创建用户选择的设备设备
/// </summary>
bool CreateCaptureDevice(IMoniker mon)
{
object capObj = null;
try
{
Guid gbf = typeof(IBaseFilter).GUID;
mon.BindToObject(null, null, ref gbf, out capObj);
capFilter = (IBaseFilter)capObj; capObj = null;
return true;
}
catch (Exception ee)
{
MessageBox.Show(this, "Could not create capture device\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return false;
}
finally
{
if (capObj != null)
Marshal.ReleaseComObject(capObj); capObj = null;
}
}
/// <summary>
/// Luoz：创建使用COM组件的接口并获得
/// </summary>
/// <returns></returns>
bool GetInte易做图ces()
{
Type comType = null;
object comObj = null;
try
{
comType = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (comType == null)
throw new NotImplementedException(@"DirectShow FilterGraph not installed/registered!");
comObj = Activator.CreateInstance(comType);
graphBuilder = (IGraphBuilder)comObj; comObj = null;
//Guid clsid = Clsid.CaptureGraphBuilder2;
//Guid riid = typeof(ICaptureGraphBuilder2).GUID;
//comObj = DsBugWO.CreateDsInstance(ref clsid, ref riid);
//capGraph = (ICaptureGraphBuilder2)comObj; comObj = null;
comType = Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2);
comObj = Activator.CreateInstance(comType);
capGraph = (ICaptureGraphBuilder2)comObj; comObj = null;
mediaCtrl = (IMediaControl)graphBuilder;
videoWin = (IVideoWindow)graphBuilder;
mediaEvt = (IMediaEventEx)graphBuilder;
return true;
}
catch (Exception ee)
{
MessageBox.Show(this, "Could not get inte易做图ces\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return false;
}
finally
{
if (comObj != null)
Marshal.ReleaseComObject(comObj); comObj = null;
}
}
/// <summary>
/// "Luoz：打造捕捉图"
/// </summary>
/// <returns></returns>
bool SetupGraph()
{
int hr;
IBaseFilter mux = null;
IFileSinkFilter sink = null;
try
{
hr = capGraph.SetFiltergraph(graphBuilder);
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
hr = graphBuilder.AddFilter(capFilter, "Ds.NET Video Capture Device");
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
DsUtils.ShowCapPinDialog(capGraph, capFilter, this.Handle);
Guid sub = MediaSubType.Avi;
hr = capGraph.SetOutputFileName(ref sub, fileName, out mux, out sink);
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
Guid cat = PinCategory.Capture;
Guid med = MediaType.Video;
hr = capGraph.RenderStream(ref cat, ref med, capFilter, null, mux); // 流文件
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
cat = PinCategory.Preview;
med = MediaType.Video;
hr = capGraph.RenderStream(ref cat, ref med, capFilter, null, null); // 预览窗口
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
return true;
}
catch (Exception ee)
{
MessageBox.Show(this, "Could not setup graph\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return false;
}
finally
{
if (mux != null)
Marshal.ReleaseComObject(mux); mux = null;
if (sink != null)
Marshal.ReleaseComObject(sink); sink = null;
}
}
/// <summary>
/// Luoz： 预览
/// </summary>
bool SetupVideoWindow()
{
int hr;
try
{
// 设置视频窗口是主窗口的子窗口
hr = videoWin.put_Owner(panel1.Handle);
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
// Set video window style
hr = videoWin.put_WindowStyle(WS_CHILD | WS_CLIPCHILDREN);
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
//使用助手功能定位在客户端的视频窗口的所有者窗口矩形
//ResizeVideoWindow();
// 使视频窗口可见，现在它已正确定位
hr = videoWin.put_Visible(DsHlp.OATRUE);
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
hr = mediaEvt.SetNotifyWindow(this.Handle, WM_GRAPHNOTIFY, IntPtr.Zero);
if (hr < 0)
Marshal.ThrowExceptionForHR(hr);
return true;
}
catch (Exception ee)
{
MessageBox.Show(this, "Could not setup video window\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return false;
}
}
}
}
--------------------编程问答--------------------
知道的谢谢告诉下
--------------------编程问答--------------------
为什么就没有人回答我的问题啊
补充：.NET技术 , C#
