视频播放时抓图

using System ;

using System.Drawing ;

using System.Collections ;

using System.ComponentModel ;

using System.Windows.Forms ;

using System.Data ;

using Microsoft.DirectX.AudioVideoPlayback ;

using System.IO;

using System.Threading;

using System.Runtime.InteropServices;

using System.Drawing.Imaging;

using DexterLib;

namespace abc

{

/// <summary>

/// Form2 的摘要说明。

/// </summary>

public class Form2 : System.Windows.Forms.Form

{

private System.Windows.Forms.Panel panel1;

private System.Windows.Forms.Button button1;

private System.Windows.Forms.Button button2;

private System.Windows.Forms.OpenFileDialog openFileDialog1;

private Video MyVideo = null ;

private System.Windows.Forms.Timer timer1;

private System.Windows.Forms.Label label1;

private System.ComponentModel.IContainer components;

public Form2()

{

// Windows 窗体设计器支持所必需的

InitializeComponent();

// TODO: 在 InitializeComponent 调用后添加任何构造函数代码

}

/// <summary>

/// 清理所有正在使用的资源。

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if(components != null)

{

components.Dispose();

}

base.Dispose( disposing );

}

Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码

/// <summary>

/// 设计器支持所需的方法 - 不要使用代码编辑器修改

/// 此方法的内容。

/// </summary>

private void InitializeComponent()

{

this.components = new System.ComponentModel.Container();

this.panel1 = new System.Windows.Forms.Panel();

this.button1 = new System.Windows.Forms.Button();

this.button2 = new System.Windows.Forms.Button();

this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();

this.timer1 = new System.Windows.Forms.Timer(this.components);

this.label1 = new System.Windows.Forms.Label();

this.SuspendLayout();

// panel1

this.panel1.Dock = System.Windows.Forms.DockStyle.Top;

this.panel1.Location = new System.Drawing.Point(0, 0);

this.panel1.Name = "panel1";

this.panel1.Size = new System.Drawing.Size(292, 176);

this.panel1.TabIndex = 0;

// button1

this.button1.Location = new System.Drawing.Point(32, 216);

this.button1.Name = "button1";

this.button1.TabIndex = 1;

this.button1.Text = "打开";

this.button1.Click += new System.EventHandler(this.button1_Click);

// button2

this.button2.Location = new System.Drawing.Point(120, 216);

this.button2.Name = "button2";

this.button2.TabIndex = 2;

this.button2.Text = "抓图";

this.button2.Click += new System.EventHandler(this.button2_Click);

// openFileDialog1

this.openFileDialog1.FileOk += new System.ComponentModel.CancelEventHandler(this.openFileDialog1_FileOk);

// timer1

this.timer1.Enabled = true;

this.timer1.Interval = 1000;

this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

// label1

this.label1.Location = new System.Drawing.Point(216, 216);

this.label1.Name = "label1";

this.label1.Size = new System.Drawing.Size(72, 23);

this.label1.TabIndex = 3;

this.label1.Text = "label1";

// Form2

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(292, 273);

this.Controls.Add(this.label1);

this.Controls.Add(this.button2);

this.Controls.Add(this.button1);

this.Controls.Add(this.panel1);

this.Name = "Form2";

this.Text = "Form2";

this.ResumeLayout(false);

}

#endregion

private void button1_Click(object sender, System.EventArgs e)

{ int height = panel1.Height ;

　　 int width = panel1.Width ;

openFileDialog1.InitialDirectory = Application.StartupPath ;

if (this.openFileDialog1 .ShowDialog() ==DialogResult.OK)

　 {

　　 if ( MyVideo != null )

　　 {

　　　 MyVideo.Dispose ( ) ;

　　 }

　　 MyVideo = new Video ( openFileDialog1.FileName ) ;

　　 MyVideo.Owner = panel1 ;

　　 panel1.Width = width ;

　　 panel1.Height = height ;

　　 MyVideo.Play();

}

private void timer1_Tick(object sender, System.EventArgs e)

{

if (MyVideo!=null)

{

this.label1 .Text =MyVideo.CurrentPosition.ToString ();

}

private void openFileDialog1_FileOk(object sender, System.ComponentModel.CancelEventArgs e)

{

}

private void button2_Click(object sender, System.EventArgs e)

{

this.Scan(MyVideo.CurrentPosition ,this.openFileDialog1.FileName );

}

void Scan(double tempid ,string filename)

{ MediaDetClass md;

md = new MediaDetClass();

Image img;

md.Filename = filename;

string fBitmapName=System.DateTime.Now.ToString ("yyyyMMddhhmmss");

md.WriteBitmapBits( tempid, 320, 240, fBitmapName+".bmp" );

img = Image.FromFile( fBitmapName + ".bmp" );

img.Save( fBitmapName + ".jpg", ImageFormat.Jpeg );

img.Dispose();

System.IO.File.Delete( fBitmapName + ".bmp" );

}

效果为