2. 实现
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;
}
}
}
