avicap32 - avicap32.dll - DLL文件信息

DLL 文件： avicap32 或者 avicap32.dll

DLL 名称： Video For Windows API DLL

描述：

avicap32.dll是Windows API应用程序接口相关模块，用于对摄像头和其它视频硬件进行AVI电影和视频的截取。

属于： Windows NT 4.0

系统 DLL文件： Yes

常见错误： File Not Found, Missing File, Exception Errors

安全等级 (0-5): 0

间谍软件： 否

广告软件： 否

API编程使用方法：

'// Capture Function Declares

Declare Function capCreateCaptureWindow Lib "avicap32.dll" Alias "capCreateCaptureWindowA" _

(ByVal lpszWindowName As String, _

ByVal dwStyle As Long, _

ByVal x As Long, _

ByVal y As Long, _

ByVal nWidth As Long, _

ByVal nHeight As Long, _

ByVal hwndParent As Long, _

ByVal nID As Long) As Long 'returns HWND

Declare Function capGetDriverDescription Lib "avicap32.dll" Alias "capGetDriverDescriptionA" _

(ByVal dwDriverIndex As Long, _

ByVal lpszName As String, _

ByVal cbName As Long, _

ByVal lpszVer As String, _

ByVal cbVer As Long) As Long 'returns C BOOL

Delphi语法声明：

function capCreateCaptureWindowA(lpszWindowName : PCHAR;

dwStyle : longint;x : integer;y : integer;nWidth : integer;

nHeight : integer;ParentWin : HWND;nId : integer): HWND;

STDCALL EXTERNAL 'AVICAP32.DLL';

Delphi中可以使用如下代码启动摄像头捕捉：

hWndC := capCreateCaptureWindowA('My Own Capture Window',

WS_CHILD or WS_VISIBLE ,Panel1.Left,Panel1.Top,Panel1.Width,Panel1.Height,Form1.Handle,0);

if hWndC <> 0 then

begin

SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);

SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0);

SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0);

SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0);

SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0);

SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0);

SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0);

SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0);

end;

参数：

WM_CAP_START= WM_USER=1024;

// start of unicode messages

WM_CAP_UNICODE_START= WM_USER+100; //开始

WM_CAP_GET_CAPSTREAMPTR= (WM_CAP_START+ 1); //获得 CAPSTR EAMPTR

WM_CAP_SET_CALLBACK_ERROR= (WM_CAP_START+ 2); //设置回调错误

WM_CAP_SET_CALLBACK_STATUS= (WM_CAP_START+ 3); //设置回调状态

WM_CAP_SET_CALLBACK_YIELD= (WM_CAP_START+ 4); //设置回调出产

WM_CAP_SET_CALLBACK_FRAME= (WM_CAP_START+ 5); //设置回调结构

WM_CAP_SET_CALLBACK_VIDEOSTREAM= (WM_CAP_START+ 6); //设置回调视频流

WM_CAP_SET_CALLBACK_WAVESTREAM= (WM_CAP_START+ 7); //设置回调视频波流

WM_CAP_GET_USER_DATA =(WM_CAP_START+ 8); //获得使用者数据

WM_CAP_SET_USER_DATA =(WM_CAP_START+ 9) ; //设置使用者数据

WM_CAP_DRIVER_CONNECT =(WM_CAP_START+ 10); //驱动程序连接

WM_CAP_DRIVER_DISCONNECT =(WM_CAP_START+ 11); //断开启动程序连接

WM_CAP_DRIVER_GET_NAME =(WM_CAP_START+ 12); //获得驱动程序名字

WM_CAP_DRIVER_GET_VERSION =(WM_CAP_START+ 13); //获得驱动程序版本

WM_CAP_DRIVER_GET_CAPS =(WM_CAP_START+ 14); //获得驱动程序性能

WM_CAP_FILE_SET_CAPTURE_FILE =(WM_CAP_START+ 20); //设置捕获文件的文件名

WM_CAP_FILE_GET_CAPTURE_FILE =(WM_CAP_START+ 21); //获得捕获文件的文件名

WM_CAP_FILE_SAVEAS =(WM_CAP_START+ 23); //另存文件为

WM_CAP_FILE_SAVEDIB =(WM_CAP_START+ 25); //保存文件

// out of order to save on ifdefs

WM_CAP_FILE_ALLOCATE =(WM_CAP_START+ 22); //分派文件, 为捕获文件建一个指定大小的文件

WM_CAP_FILE_SET_INFOCHUNK =(WM_CAP_START+ 24); //设置开始文件

WM_CAP_EDIT_COPY =(WM_CAP_START+ 30); //编辑复制,把图象考入剪贴板

WM_CAP_SET_AUDIOFORMAT =(WM_CAP_START+ 35); //设置音频格式

WM_CAP_GET_AUDIOFORMAT =(WM_CAP_START+ 36); //捕获音频格式

WM_CAP_DLG_VIDEOFORMAT =(WM_CAP_START+ 41); //1065 打开视频格式设置对话框, 选择数字视频的框架大小和视频图像的色深，以及捕获视频图像的压缩格式。

WM_CAP_DLG_VIDEOSOURCE =(WM_CAP_START+ 42); //1066 打开属性设置对话框，设置对比度、亮度等。(视频源对话框) 选择视频输入通道和视频图像的动态参数。

WM_CAP_DLG_VIDEODISPLAY =(WM_CAP_START+ 43); //1067 打开视频显示对话框

WM_CAP_GET_VIDEOFORMAT =(WM_CAP_START+ 44); //1068 获得视频格式

WM_CAP_SET_VIDEOFORMAT =(WM_CAP_START+ 45); //1069 设置视频格式

WM_CAP_DLG_VIDEOCOMPRESSION =(WM_CAP_START+ 46); //1070 打开压缩设置对话框

WM_CAP_SET_PREVIEW =(WM_CAP_START+ 50); //设置预览模式

WM_CAP_SET_OVERLAY =(WM_CAP_START+ 51); //设置覆盖

WM_CAP_SET_PREVIEWRATE =(WM_CAP_START+ 52); //设置预览模式下图像的帧速度

WM_CAP_SET_SCALE =(WM_CAP_START+ 53); //设置预览视频的缩放比例

WM_CAP_GET_STATUS =(WM_CAP_START+ 54); //获得状态

WM_CAP_SET_SCROLL =(WM_CAP_START+ 55); //设置卷

WM_CAP_GRAB_FRame =(WM_CAP_START+ 60); //逮捕结构

WM_CAP_GRAB_FRame_NOSTOP =(WM_CAP_START+ 61); //停止逮捕结构,截取当前图象

WM_CAP_SEQUENCE =(WM_CAP_START+ 62); //次序，捕捉到文件

WM_CAP_SEQUENCE_NOFILE =(WM_CAP_START+ 63); //没有文件

WM_CAP_SET_SEQUENCE_SETUP =(WM_CAP_START+ 64); //设置当前捕获的帧频率

WM_CAP_GET_SEQUENCE_SETUP =(WM_CAP_START+ 65); //获得当前捕获的帧频率

WM_CAP_SET_MCI_DEVICE =(WM_CAP_START+ 66); //设置媒体控制接口

WM_CAP_GET_MCI_DEVICE =(WM_CAP_START+ 67); //获得媒体控制接口

WM_CAP_STOP =(WM_CAP_START+ 68); //停止捕捉

WM_CAP_ABORT =(WM_CAP_START+ 69); //异常中断

WM_CAP_SINGLE_FRame_OPEN =(WM_CAP_START+ 70); //打开单一的结构

WM_CAP_SINGLE_FRame_CLOSE =(WM_CAP_START+ 71); //关闭单一的结构

WM_CAP_SINGLE_FRame =(WM_CAP_START+ 72); //单一的结构

WM_CAP_PAL_OPEN =(WM_CAP_START+ 80); //打开视频

WM_CAP_PAL_SAVE =(WM_CAP_START+ 81); //保存视频

WM_CAP_PAL_PASTE =(WM_CAP_START+ 82); //粘贴视频

WM_CAP_PAL_AUTOCREATE =(WM_CAP_START+ 83); //自动创造

WM_CAP_PAL_MANUALCREATE =(WM_CAP_START+ 84); //手动创造

// Following added post VFW 1.1

WM_CAP_SET_CALLBACK_CAPCONTROL =(WM_CAP_START+ 85); // 设置收回的错误

WM_CAP_END =WM_CAP_SET_CALLBACK_CAPCONTROL;