使用下面的代码可以直接采集和播放USB摄相头的视频;但是我调用C++编写的DLL,代理函数中接收返回的视频流; 然后用DrawDibDraw播放的时候有问题, 带驱动的可以直接播放,免驱动的播放的时候一直闪烁。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 System.Runtime.InteropServices;namespace WindowsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } const short WM_CAP = 1024; const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10; const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11; const int WM_CAP_EDIT_COPY = WM_CAP + 30; const int WM_CAP_SET_PREVIEW = WM_CAP + 50; const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52; const int WM_CAP_SET_SCALE = WM_CAP + 53; const int WS_CHILD = 1073741824; const int WS_VISIBLE = 268435456; const short SWP_NOMOVE = 2; const short SWP_NOSIZE = 1; const short SWP_NOZORDER = 4; const short HWND_BOTTOM = 1; int iDevice = 0; int hHwnd; [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SendMessageA")] static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] object lParam); [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetWindowPos")] static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags); [System.Runtime.InteropServices.DllImport("user32")] static extern bool DestroyWindow(int hndw); [System.Runtime.InteropServices.DllImport("avicap32.dll")] static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID); [System.Runtime.InteropServices.DllImport("avicap32.dll")] static extern bool capGetDriverDescriptionA(short wDriver, string lpszName, int cbName, string lpszVer, int cbVer);
RGB格式可以直接播放,但是直接播放YUY2格式,有问题.我采集和播放的是USB摄相头的视频.
然后让C#来播放.C#中通过代理函数来接收视频数据,接收到之后进行播放.好象现在有驱动的USB摄相头采集的原始视频是RGB格式,
免驱动的摄相头采集的原始视频是YUY格式...
然后用DrawDibDraw播放的时候有问题,
带驱动的可以直接播放,免驱动的播放的时候一直闪烁。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 System.Runtime.InteropServices;namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} const short WM_CAP = 1024;
const int WM_CAP_DRIVER_CONNECT = WM_CAP + 10;
const int WM_CAP_DRIVER_DISCONNECT = WM_CAP + 11;
const int WM_CAP_EDIT_COPY = WM_CAP + 30;
const int WM_CAP_SET_PREVIEW = WM_CAP + 50;
const int WM_CAP_SET_PREVIEWRATE = WM_CAP + 52;
const int WM_CAP_SET_SCALE = WM_CAP + 53;
const int WS_CHILD = 1073741824;
const int WS_VISIBLE = 268435456;
const short SWP_NOMOVE = 2;
const short SWP_NOSIZE = 1;
const short SWP_NOZORDER = 4;
const short HWND_BOTTOM = 1;
int iDevice = 0;
int hHwnd; [System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SendMessageA")]
static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)]
object lParam);
[System.Runtime.InteropServices.DllImport("user32", EntryPoint = "SetWindowPos")]
static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
[System.Runtime.InteropServices.DllImport("user32")]
static extern bool DestroyWindow(int hndw);
[System.Runtime.InteropServices.DllImport("avicap32.dll")]
static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
[System.Runtime.InteropServices.DllImport("avicap32.dll")]
static extern bool capGetDriverDescriptionA(short wDriver, string lpszName, int cbName, string lpszVer, int cbVer);
private void OpenPreviewWindow()
{
int iHeight = 320;
int iWidth = 200; hHwnd = capCreateCaptureWindowA(iDevice.ToString(), (WS_VISIBLE | WS_CHILD), 0, 0, 640, 480, picCapture.Handle.ToInt32(), 0); if (SendMessage(hHwnd, WM_CAP_DRIVER_CONNECT, iDevice, 0) == 1)
{
SendMessage(hHwnd, WM_CAP_SET_SCALE, 1, 0);
SendMessage(hHwnd, WM_CAP_SET_PREVIEWRATE, 66, 0);
SendMessage(hHwnd, WM_CAP_SET_PREVIEW, 1, 0);
SetWindowPos(hHwnd, HWND_BOTTOM, 0, 0, iWidth, iHeight, (SWP_NOMOVE | SWP_NOZORDER));
}
else
{
DestroyWindow(hHwnd);
}
} private void ClosePreviewWindow()
{
SendMessage(hHwnd, WM_CAP_DRIVER_DISCONNECT, iDevice, 0);
DestroyWindow(hHwnd);
} //picCapture为一个PictureBox
//device_number_textBox.Text=0为一个TextBox,值为0
private void button1_Click(object sender, EventArgs e)
{
iDevice = int.Parse(device_number_textBox.Text);
OpenPreviewWindow();
}
}
}
但是免驱动的,播放就不断地闪烁查询了下相关资料,安装驱动的默认采集格式是 RGB24,
免驱动的默认格式是YUY2,不知道是不是这个原因