菜鸟求解，大虾们请指教。————在线等

以下部分是对以上类中方法的调用
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Vedio.BLL;
using Vedio.Models;
using Vedio.DAL;
namespace VedioWeb
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        VediocameraManager vm = new VediocameraManager();
        VedionameManager vr = new VedionameManager();
        Label lab = null;
        cVideo video;
        private void Form2_Load(object sender, EventArgs e)
        {
            List<Vediocamera> li = vm.GetVediocameraListByAll();
            for (int i = 0; i < vm.getcount(); i++)
            {
                 lab=new Label();
                 lab.Name = li[i].CameraID.ToString();
                 lab.Text = li[i].CameraName;
                 lab.Location = new Point(40, 40 + (i * 40));
                 //所有的标签都绑定到同一事件
                 lab.Click += new System.EventHandler(btn_click);
                 panel1.Controls.Add(lab);
            }
            video = new cVideo(pictureBox1.Handle, 0, 0, pictureBox1.Width, pictureBox1.Height);
            video.StartVideo();
        }
        /// <summary>
        /// 摄像头列表的单击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void btn_click(object sender, EventArgs e)
        {
           
        
        
        }
        /// <summary>
        /// pannel加载事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void panel2_Paint(object sender, PaintEventArgs e)
        {
            axRealAudio1.Visible = false;
            List<Vediocamera> lm=vm.GetVediocameraListByAll();
            tv_info.Nodes.Clear();
            TreeNode tvr = null;
            foreach (Vediocamera item in lm)
            {
                tvr = new TreeNode(item.CameraName);
                List<string> yy = vr.getmany(item.CameraID);
                foreach (string yn in yy)
                {
                    TreeNode tn = new TreeNode(yn);
                    tvr.Nodes.Add(tn);
                }
                tv_info.Nodes.Add(tvr);
            }
           
        }
        /// <summary>
        /// 树形菜单的选择事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tv_info_AfterSelect(object sender, TreeViewEventArgs e)
        {
            if (tv_info.SelectedNode.Level ==0)
            {
                MessageBox.Show("此节点不可选择");
                return;
            }
            else
            {
                axRealAudio1.Visible = true;
                string nm = tv_info.SelectedNode.Text;
                this.axRealAudio1.SetControls("ImageWindow,controlpanel");
                this.axRealAudio1.Source ="C:/Documents and Settings/Administrator/桌面/VedioProgess/VedioWeb/bin/Debug/" + nm + "";
                 //mencoder -oac faac -faacopts br=64:mpeg=2:object=1 -srate 44100 -vf scale=400:240,harddup -ofps 15 -ovc xvid -xvidencopts bitrate=320 待压缩的文件 -o 输出文件名.mp4
                
                this.axRealAudio1.SetLoop(true);
                this.axRealAudio1.SetFullScreen();
                this.axRealAudio1.SetWantErrors(true);
                this.axRealAudio1.AutoStart = true; 
            }
        }
        /// <summary>
        /// 开始录像
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_start_Click(object sender, EventArgs e)
        {
            video.StarKinescope(@"d:\" + DateTime.Today.Month.ToString() + DateTime.Today.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + ".3GP");
            btn_cancel.Enabled = true;
            btn_start.Enabled = false;
        }
        /// <summary>
        /// 拍摄照片
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_vedio_Click(object sender, EventArgs e)
        {
            video.Images(@"d:\" + DateTime.Today.Month.ToString() + DateTime.Today.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + ".JPG");  
        }
        /// <summary>
        /// 结束录制
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_cancel_Click(object sender, EventArgs e)
        {
            video.StopKinescope();
            btn_start.Enabled = true;
            btn_cancel.Enabled = false;
        }
        /// <summary>
        /// 退出程序
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_exit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
｝
｝
这个实例运行没错，视频截图也可以实现，但是视频录制有点问题，视频在刚开始录制的时候会有一点点卡，录制的视频内容似乎只是录制了卡的这一段时间，卡的时间也不相同，停止录制的按钮并没有起到作用，对此我很疑惑，请各位大侠帮我看看到底是什么问题。本人不胜感激