最近做了一个基于Aforge，MMPEG 的 基于摄像头的，视频录像小软件
软件实现的工能如下：
1.自动开机录像。这里自动把摄像头的摄像大小设置成 320 * 320
try
{
Common.Setting set = new Common.Setting();
XmlSerialize xml = new XmlSerialize();
set = xml.DeSerialize();
this.Path = set.Path;
this.maxSize = set.MaxSize;
this.frameRate = set.FrameRate;
try
{
string dic = System.DateTime.Now.AddMonths(-2).ToString("yyyyMMdd") + "\\";
string mypath = @Path + dic;
System.IO.Directory.Delete(mypath,true);
}
catch (Exception ex) { }
// enumerate video devices
videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
if (videoDevices.Count == 0)
throw new ApplicationException();
device = videoDevices[0].MonikerString;
// create video source
VideoCaptureDevice videoSource = new VideoCaptureDevice(this.VideoDevice);
//videoSource.DesiredFrameRate = this.frameRate;
videoSource.DesiredFrameSize = new System.Drawing.Size(320, 240);
this.videoSourcePlayer.Size = new System.Drawing.Size(320, 240);
// open it
OpenVideoSource(videoSource);
}
catch (ApplicationException ex)
{
MessageBox.Show(ex.ToString());
this.Close();
}
2. 录像过程
bool StopREC = true;
bool CreateNewFile = true;
string myfile = "";
int FrameCountSame = 0;
private void videoSourcePlayer_NewFrame(object sender, ref Bitmap image)
{
count++;
System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(image);
SolidBrush drawBrush = new SolidBrush(Color.Red);
Font drawFont = new Font("Arial", 6, FontStyle.Bold, GraphicsUnit.Millimeter);
int xPos = image.Height - (image.Height - 25);
int yPos = 3;
string date = System.DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");//得到写到屏上的时间
string dic = System.DateTime.Now.ToString("yyyyMMdd")+"\\";
string dateFile = System.DateTime.Now.ToString("HH.mm.ss") + ".avi";
string mypath = @Path+dic;
System.IO.Directory.CreateDirectory(mypath);
gr.DrawString(date, drawFont, drawBrush, xPos, yPos);
#region 这里使用 wmv3的格式
//if (StopREC)
//{
// StopREC = false;
// writer = new AVIWriter("wmv3");
// writer.FrameRate = 8;
// writer.Open(@"d:\log" + System.DateTime.Now.ToString("yyyyMMddhhmmss") + ".avi", 640, 480);
// writer.AddFrame(image);
//}
//else
//{
// writer.AddFrame(image);
//}
#endregion
if (count > this.frameRate) { return; }
if (ifCreateFilePath(myfile)) { CreateNewFile = true; myfile = mypath + dateFile; }
if (StopREC)
{
StopREC = false;
this.CreateNewFile = false;
int width = 320;
int height = 240;
writer1 = new VideoFileWriter();
writer1.Open(@myfile, width, height, this.frameRate, VideoCodec.MPEG4);
//writer1.Open(@myfile, width, height);
try
{
writer1.WriteVideoFrame(image);
}
catch (Exception ex) {
LogErr(ex.ToString());
}
}
else {
if (this.CreateNewFile)
{
this.CreateNewFile = false;
if (writer1 != null)
{
writer1.Close();
writer1.Dispose();
}
int width = 320;
int height = 240;
writer1 = new VideoFileWriter();
writer1.Open(@myfile, width, height, this.frameRate, VideoCodec.MPEG4);
//writer1.Open(@myfile, width, height);
writer1.WriteVideoFrame(image);
}
else
{
writer1.WriteVideoFrame(image);
}
}
基本上蛮足需要。
1.通过Aforge 录像时，如果突然关机。不能接上一文件继续录像（我没找到相应办法）。
2.frameRate的问题，我看网上说，要达到 30 时才是最好的，但我的摄像头，在笔记本上就是达不到，只能到 10。所以我在录像时必须设置 这个值为 8 ，否则录像时，不是像快进，就是在放慢动作，而且超过8的帧数不要了（感觉这样不是很对，但先只能这样了）。
上面两个问题记录下来，以后找找资料再处理。