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