Question

如何使用Directshow.net调用此对话框？

Answer 1

假设你有一个IBaseFilter引用，这样的东西会起作用：

[DllImport("oleaut32.dll", CharSet = CharSet.Auto)]
    internal static extern int OleCreatePropertyFrame(
        IntPtr hwndOwner,
        uint x, uint y,
        [MarshalAs(UnmanagedType.LPWStr)]
        string caption,
        uint objectCount,
        [MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.IUnknown)]
        object[] lplpUnk,
        int cPages,
        IntPtr pageClsID,
        Guid lcid,
        uint dwReserved,
        IntPtr lpvReserved);

    public void DisplayPropertyPages(Form form, IBaseFilter filter)
    {
            var propertyPages = filter as ISpecifyPropertyPages;
            DsCAUUID pages;
            FilterInfo info;
            int hr = filter.QueryFilterInfo(out info);
            DsError.ThrowExceptionForHR(hr);
            if (propertyPages == null)
            {
                throw new ApplicationException("IBaseFilter doesn't implement ISpecifyPropertyPages");
            }
            hr = propertyPages.GetPages(out pages);
            DsError.ThrowExceptionForHR(hr);
            var filters = new IBaseFilter[1];
            filters[0] = filter;
            hr = OleCreatePropertyFrame(form.Handle, 0, 0, info.achName, 1, filters,
                pages.cElems, pages.pElems, Guid.Empty, 0, IntPtr.Zero);
            Marshal.FreeCoTaskMem(pages.pElems);
            DsError.ThrowExceptionForHR(hr);
    }

Answer 2

请检查MSDN中OleCreatePropertyFrame（）的说明。

Guid lcid无效。结果：托管调试助手'PInvokeStackImbalance'在'D：\ CVS \ Dev \ Filters \ H264 \ H264mfxEncoder \ Samples \ C＃\ H264EncoderTest \ bin \ Debug \ H264EncoderTest.vshost.exe'中检测到问题。附加信息：调用PInvoke函数'H264EncoderTest！H264EncoderTest.CGraph :: OleCreatePropertyFrame'使堆栈失衡。这很可能是因为托管PInvoke签名与非托管目标签名不匹配。检查PInvoke签名的调用约定和参数是否与目标非托管签名匹配。

必须是：uint lcid 和hr = OleCreatePropertyFrame（form.Handle，0,0，info.achName，1，filters，pages.cElems，pages.pElems，0,0，IntPtr.Zero）;

C＃：如何使用directshow.net来显示这个对话框？

2 个答案: