高分求救C# 实现 摄像头拍摄,类似Amcap

C# 实现 摄像头拍摄,类似Amcap,摄像头上有个快门按钮.按下去就会自动截图的功能.
或者怎样用C# 获取 摄像头按下快门键的 信号.

6 个解决方案

#1

可以调用系统的摄像头。

public struct videohdr_tag
        {
            public byte[] lpData;
            public int dwBufferLength;
            public int dwBytesUsed;
            public int dwTimeCaptured;
            public int dwUser;
            public int dwFlags;
            public int[] dwReserved;
        }

[DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int capCreateCaptureWindowA([MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
        [DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool capGetDriverDescriptionA(short wDriver, [MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszName, int cbName, [MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszVer, int cbVer);
        [DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool DestroyWindow(int hndw);
        [DllImport("user32", EntryPoint = "SendMessageA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)]   object lParam);
        [DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
        [DllImport("vfw32.dll")]
        public static extern string capVideoStreamCallback(int hwnd, videohdr_tag videohdr_tag);
        [DllImport("vicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool capSetCallbackOnFrame(int hwnd, string s);

private void OpenCapture()
        {//打开摄像头
            int intWidth = this.panel1.Width;
            int intHeight = this.panel1.Height;
            int intDevice = 0;
            string refDevice = intDevice.ToString();
            //创建视频窗口并得到句柄
            hHwnd = CameraForm.capCreateCaptureWindowA(ref   refDevice, 1342177280, 0, 0, 640, 480, this.panel1.Handle.ToInt32(), 0);
            if (CameraForm.SendMessage(hHwnd, 0x40a, intDevice, 0) > 0)
            {
                CameraForm.SendMessage(this.hHwnd, 0x435, -1, 0);
                CameraForm.SendMessage(this.hHwnd, 0x434, 0x42, 0);
                CameraForm.SendMessage(this.hHwnd, 0x432, -1, 0);
                CameraForm.SetWindowPos(this.hHwnd, 1, 0, 0, intWidth, intHeight, 6);
            }
            else
            {
                CameraForm.DestroyWindow(this.hHwnd);
            }
        }

        public void DestroyCaptrue()
{
            //停止视频注销视频句柄
            CameraForm.SendMessage(this.hHwnd, 0x40b, 0, 0);
            CameraForm.DestroyWindow(this.hHwnd);
}

public void PicShot()
{//截图
try
            {
                CameraForm.SendMessage(this.hHwnd, 0x41e, 0, 0);
                IDataObject obj1 = Clipboard.GetDataObject();
                if (obj1.GetDataPresent(typeof(Bitmap)))
                {
                    Image image1 = (Image)obj1.GetData(typeof(Bitmap));
                    SaveFileDialog SaveFileDialog1 = new SaveFileDialog();
                    SaveFileDialog1.FileName = DateTime.Now.ToString("yyyyMMddhhmmss");
                    SaveFileDialog1.Filter = "Image Files(*.JPG;*.GIF)|*.JPG;*.GIF|All files (*.*)|*.*";
                    if (SaveFileDialog1.ShowDialog() == DialogResult.OK)
                    {
                        image1.Save(SaveFileDialog1.FileName, ImageFormat.Bmp);
                    }
                }
            }
            catch
            {
            }
}

#2

引用 1 楼 CHEN504390172 的回复:

可以调用系统的摄像头。

public struct videohdr_tag
        {
            public byte[] lpData;
            public int dwBufferLength;
            public int dwBytesUsed;
            public int dwTimeCaptured;
            public int dwUser;
            public int dwFlags;
            public int[] dwReserved;
        }

[DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int capCreateCaptureWindowA([MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
        [DllImport("avicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool capGetDriverDescriptionA(short wDriver, [MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszName, int cbName, [MarshalAs(UnmanagedType.VBByRefStr)]   ref   string lpszVer, int cbVer);
        [DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool DestroyWindow(int hndw);
        [DllImport("user32", EntryPoint = "SendMessageA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)]   object lParam);
        [DllImport("user32", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
        [DllImport("vfw32.dll")]
        public static extern string capVideoStreamCallback(int hwnd, videohdr_tag videohdr_tag);
        [DllImport("vicap32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public static extern bool capSetCallbackOnFrame(int hwnd, string s);

private void OpenCapture()
        {//打开摄像头
            int intWidth = this.panel1.Width;
            int intHeight = this.panel1.Height;
            int intDevice = 0;
            string refDevice = intDevice.ToString();
            //创建视频窗口并得到句柄
            hHwnd = CameraForm.capCreateCaptureWindowA(ref   refDevice, 1342177280, 0, 0, 640, 480, this.panel1.Handle.ToInt32(), 0);
            if (CameraForm.SendMessage(hHwnd, 0x40a, intDevice, 0) > 0)
            {
                CameraForm.SendMessage(this.hHwnd, 0x435, -1, 0);
                CameraForm.SendMessage(this.hHwnd, 0x434, 0x42, 0);
                CameraForm.SendMessage(this.hHwnd, 0x432, -1, 0);
                CameraForm.SetWindowPos(this.hHwnd, 1, 0, 0, intWidth, intHeight, 6);
            }
            else
            {
                CameraForm.DestroyWindow(this.hHwnd);
            }
        }

        public void DestroyCaptrue()
{
            //停止视频注销视频句柄
            CameraForm.SendMessage(this.hHwnd, 0x40b, 0, 0);
            CameraForm.DestroyWindow(this.hHwnd);
}

public void PicShot()
{//截图
try
            {
                CameraForm.SendMessage(this.hHwnd, 0x41e, 0, 0);
                IDataObject obj1 = Clipboard.GetDataObject();
                if (obj1.GetDataPresent(typeof(Bitmap)))
                {
                    Image image1 = (Image)obj1.GetData(typeof(Bitmap));
                    SaveFileDialog SaveFileDialog1 = new SaveFileDialog();
                    SaveFileDialog1.FileName = DateTime.Now.ToString("yyyyMMddhhmmss");
                    SaveFileDialog1.Filter = "Image Files(*.JPG;*.GIF)|*.JPG;*.GIF|All files (*.*)|*.*";
                    if (SaveFileDialog1.ShowDialog() == DialogResult.OK)
                    {
                        image1.Save(SaveFileDialog1.FileName, ImageFormat.Bmp);
                    }
                }
            }
            catch
            {
            }
}

这个好像不行.我之前有试过.可能是我不会用.需要什么控件的?

#3

上面用的是VFW，建议还是用DirectX Show吧，有开源项目

#4

还有好多呢，aForge＼emgu cv。。。

#5

我发个demo到你邮箱

#6

现在我用Aforge.net framework 实现的.效果不错.