先建一個新專案，
依序加入 ASFWriter1, Filter1, FilterGraph1, VideoWindow1, 4個元件
以下在ObjectInspector視窗設定屬性，
FilterGraph1
Mode = gmCapture
VideoWindow1
FilterGraph = FilterGraph1
Filter1
BaseFilter = DirectShow Filters->"WM ASF Writer"
FilterGraph = FilterGraph1
ASFWriter1
FileName = c:\temp.asf
FilterGraph = FilterGraph1
Port = 3333
Profile = wmp_V80_255VideoPDA <=這是內定值

//===================================================================
//以下是程式碼
//===================================================================
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
vInitAsfWriter();
}

IBaseFilter *SourceFilter = NULL;
IBaseFilter *VideoFilter = NULL;
TSysDevEnum *SysDev = NULL;

void TForm1::vInitAsfWriter()
{
SysDev = new TSysDevEnum(CLSID_VideoInputDeviceCategory);
ICaptureGraphBuilder2 *GraphBuilder = NULL;
IBaseFilter *ASFWrite = NULL;

Filter1->BaseFilter->Moniker = SysDev->GetMoniker(0);

FilterGraph1->Active = true;
CheckDSError(FilterGraph1->QueryInterface(IID_ICaptureGraphBuilder2, &GraphBuilder));
CheckDSError(ASFWriter1->QueryInterface(IID_IBaseFilter, &ASFWrite));
CheckDSError(VideoWindow1->QueryInterface(IID_IBaseFilter, &VideoFilter));
CheckDSError(Filter1->QueryInterface(IID_IBaseFilter, &SourceFilter));

GraphBuilder->RenderStream(&PIN_CATEGORY_PREVIEW, NULL, SourceFilter, NULL, VideoFilter);
GraphBuilder->RenderStream(&PIN_CATEGORY_CAPTURE, NULL, SourceFilter, NULL, ASFWrite);

FilterGraph1->Play();

if(GraphBuilder) GraphBuilder->Release();
if(VideoFilter) VideoFilter->Release();
if(SourceFilter) SourceFilter->Release();
}
//===================================================================
//程式結束
//===================================================================

這時 FilterGraph1->Play() 一執行，就會產生一個"...無法指出的的錯誤..."，然後程式結束。
將ASFWriter1 改成以下
Profile = wmp_V80_288VideoOnly <=這是新值
這次可以正常執行，可是.........問題粉大!!!!!!!!!!!!!
1) 都沒捕捉到聲音，我用Media Player播放temp.asf，然後看影片資訊,視訊轉碼器是Window Media Video V8，但是音訊轉碼器是空的，
2) 為啥ASFWriter1的Profile 只能指定為wmp_V80_288VideoOnly，一使用其他的值，馬上 "...無法指出的的錯誤..."
網路上說可以改Profile，可是怎改啊!!!!!!!!!!
3) ASFWriter1的c:\temp.asf, 能讓他不產生嗎？我是要網路監控，要是讓他一整天儲存下來還得了，外加影響程式效能...
我有在網上找到說要刪除文件的sink就行，可是... sink在哪啊!!!。救人喔。

這些問題已經卡了我好久了，網路上找了好久的資料，程式碼改來改去，還是不行，
只好請各位大蝦幫忙了。
拜託拜託

taishyang 重新編輯於 2007-04-24 10:23:02， 註解 無‧