基于AForge实现C#摄像头视频录制功能

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Timers;
 
//using AForge
using AForge;
using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Video.FFMPEG;
using AForge.Controls;
 
namespace video_record
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
 
    //关闭窗口响应函数
    private void button2_Click(object sender, EventArgs e)
    {
      if (this.writer.IsOpen)
      {
        MessageBox.Show("视频流还没有写完，请点击结束录制。", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return;
      }
      this.videoSource.SignalToStop();
      this.videoSource.WaitForStop();
      this.videoSourcePlayer.SignalToStop();
      this.videoSourcePlayer.WaitForStop();
      this.Hide();
      this.Close();
      this.Dispose();
    }
 
    private FilterInfoCollection videoDevices; //摄像头设备
    private VideoCaptureDevice videoSource;   //视频的来源选择
    private VideoSourcePlayer videoSourcePlayer;  //AForge控制控件
    private VideoFileWriter writer;   //写入到视频
    private bool is_record_video = false;  //是否开始录像
    System.Timers.Timer timer_count;
    int tick_num = 0;
 
    //窗体初始化函数
    private void Form1_Load(object sender, EventArgs e)
    {
      this.label5.Visible = false;
 
      this.videoSourcePlayer = new AForge.Controls.VideoSourcePlayer();
      this.videoSource = new VideoCaptureDevice();
      this.writer = new VideoFileWriter();
 
      //设置视频编码格式
      this.comboBox_videoecode.Items.Add("Raw");
      this.comboBox_videoecode.Items.Add("MPEG2");
      this.comboBox_videoecode.Items.Add("FLV1");
      this.comboBox_videoecode.Items.Add("H263p");
      this.comboBox_videoecode.Items.Add("MSMPEG4v3");
      this.comboBox_videoecode.Items.Add("MSMPEG4v2");
      this.comboBox_videoecode.Items.Add("WMV2");
      this.comboBox_videoecode.Items.Add("WMV1");
      this.comboBox_videoecode.Items.Add("MPEG4");
      this.comboBox_videoecode.SelectedIndex = 1;
 
      //设置视频来源
      try
      {
        // 枚举所有视频输入设备
        videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
 
        if (videoDevices.Count == 0)
          throw new ApplicationException();  //没有找到摄像头设备
 
        foreach (FilterInfo device in videoDevices)
        {
          this.comboBox_camera.Items.Add(device.Name);
        }
        //this.comboBox_camera.SelectedIndex = 0;  //注释掉，选择摄像头来源的时候才会才会触发显示摄像头信息
      }
      catch (ApplicationException)
      {
        videoDevices = null;
        MessageBox.Show("没有找到摄像头设备", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
      }
 
      //秒表
      this.timer_count = new System.Timers.Timer();  //实例化Timer类，设置间隔时间为10000毫秒；
      this.timer_count.Elapsed += new System.Timers.ElapsedEventHandler(tick_count);  //到达时间的时候执行事件；
      this.timer_count.AutoReset = true;  //设置是执行一次（false）还是一直执行(true)；
      this.timer_count.Interval = 1000;
    }
 
    //视频源选择下拉框选择之后的响应函数
    private void comboBox_camera_SelectedIndexChanged(object sender, EventArgs e)
    {
      int selected_index = this.comboBox_camera.SelectedIndex;
      this.videoSource = new VideoCaptureDevice(videoDevices[selected_index].MonikerString);
      // set NewFrame event handler
      videoSource.NewFrame += new NewFrameEventHandler(show_video);
      videoSource.Start();
      videoSourcePlayer.VideoSource = videoSource;
      videoSourcePlayer.Start();
      this.label5.Text = "连接中...";
      this.label5.Visible = true;
      isshowed = true;
    }
 
    bool isshowed = true;
    //新帧的触发函数
    private void show_video(object sender, NewFrameEventArgs eventArgs)
    {
      if (isshowed)
      {
        this.label5.Visible = false;
        isshowed = false;
      }
      Bitmap bitmap = eventArgs.Frame;  //获取到一帧图像
      pictureBox1.Image = Image.FromHbitmap(bitmap.GetHbitmap());
      if (is_record_video)
      {
        writer.WriteVideoFrame(bitmap);
      }
    }
 
    //拍摄图像按钮响应函数
    private void button1_Click(object sender, EventArgs e)
    {
      if (this.videoSource.IsRunning && this.videoSourcePlayer.IsRunning)
      {
        Bitmap bitmap = this.videoSourcePlayer.GetCurrentVideoFrame();
        bitmap.Save("img.jpeg", System.Drawing.Imaging.ImageFormat.Jpeg);
      }
      else
        MessageBox.Show("摄像头没有运行", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
 
    //开始录像按钮响应函数
    private void button_start_Click(object sender, EventArgs e)
    {
      int width = 640;  //录制视频的宽度
      int height = 480;  //录制视频的高度
      int fps = 9;
 
      //创建一个视频文件
      String video_format = this.comboBox_videoecode.Text.Trim(); //获取选中的视频编码
      if (this.videoSource.IsRunning && this.videoSourcePlayer.IsRunning)
      {
        if (-1 != video_format.IndexOf("MPEG"))
        {
          writer.Open("test.avi", width, height, fps, VideoCodec.MPEG4);
        }
        else if (-1 != video_format.IndexOf("WMV"))
        {
          writer.Open("test.wmv", width, height, fps, VideoCodec.WMV1);
        }
        else
        {
          writer.Open("test.mkv", width, height, fps, VideoCodec.Default);
        }
      }
      else
        MessageBox.Show("没有视频源输入，无法录制视频。", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
 
      timer_count.Enabled = true;//是否执行System.Timers.Timer.Elapsed事件；
      this.label5.Visible = true;
      this.label5.Text = "REC";
      this.is_record_video = true;
    }
 
 
    //停止录制视频响应函数
    private void button_stop_Click(object sender, EventArgs e)
    {
      this.label5.Visible = false;
      this.is_record_video = false;
      this.writer.Close();
      this.timer_count.Enabled = false;
      tick_num = 0;
    }
 
    //暂停按钮响应函数
    private void button3_Click(object sender, EventArgs e)
    {
      if (this.button3.Text.Trim() == "暂停录像")
      {
        this.is_record_video = false;
        this.label5.Visible = false;
        this.button3.Text = "恢复录像";
        timer_count.Enabled = false;  //暂停计时
        return;
      }
      if (this.button3.Text.Trim() == "恢复录像")
      {
        this.is_record_video = true;
        timer_count.Enabled = true;   //恢复计时
        this.label5.Visible = true;
        this.button3.Text = "暂停录像";
      }
    }
 
    //计时器响应函数
    public void tick_count(object source, System.Timers.ElapsedEventArgs e)
    {
      tick_num++;
      int temp = tick_num;
 
      int sec = temp % 60;
 
      int min = temp / 60;
      if (60 == min)
      {
        min = 0;
        min++;
      }
 
      int hour = min / 60;
 
      String tick = hour.ToString() + "：" + min.ToString() + "：" + sec.ToString();
      this.label4.Text = tick;
    }
    
 
  }
}