如何路线exe异常回到维生素b6程序？

Question

我有一个维生素b6应用程序，这将呼叫的mencoder.exe 这一部分下将一些文件享受高品质的格式。我得到这个古怪的未经处理的异常问题，从mencoder每当我试图把这一opendivx文件。

此刻，我不清楚是否是这个编译码器是罪魁祸首。不管怎么样，我已经尝试修改命令行，甚至下载的最新版本mencoder.

所以转换工作正常和唯一的问题是，mencoder会崩溃的结束，作为视频文件不知怎的，超过100％至102％的.因此，我的问题是如何路线，这个例外的处理方式通过我的维生素b6应用程序，这样的丑陋的错误弹出会不会显示？

我甚至包含的例外捕获的编码，但它没有赶上，例外。

    ' Function GetCommandOutput
'
' sCommandLine:  [in] Command line to launch
' blnStdOut        [in,opt] True (defualt) to capture output to STDOUT
' blnStdErr        [in,opt] True to capture output to STDERR. False is default.
' blnOEMConvert:   [in,opt] True (default) to convert DOS characters to Windows, False to skip conversion
'
' Returns:       String with STDOUT and/or STDERR output
'
Public Function GetCommandOutput(sCommandLine As String, _
                                 Optional blnStdOut As Boolean = True, _
                                 Optional blnStdErr As Boolean = False, _
                                 Optional blnOEMConvert As Boolean = True, _
                                 Optional encoderType As String) As String

    Dim hPipeRead   As Long, hPipeWrite1 As Long, hPipeWrite2 As Long
    Dim hCurProcess As Long
    Dim sa          As SECURITY_ATTRIBUTES
    Dim si          As STARTUPINFO
    Dim pi          As PROCESS_INFORMATION
    Dim baOutput()  As Byte
    Dim sNewOutPut  As String
    Dim lBytesRead  As Long
    Dim fTwoHandles As Boolean
    Dim lRet        As Long

    Const BUFSIZE = 1024      ' pipe buffer size

    On Error GoTo ErrorHandler

    ' At least one of them should be True, otherwise there's no point in calling the function
    If (Not blnStdOut) And (Not blnStdErr) Then
        Err.Raise 5         ' Invalid Procedure call or Argument
    End If

    ' If both are true, we need two write handles. If not, one is enough.
    fTwoHandles = blnStdOut And blnStdErr
    ReDim baOutput(BUFSIZE - 1) As Byte

    With sa
        .nLength = Len(sa)
        .bInheritHandle = 1    ' get inheritable pipe handles
    End With

    If CreatePipe(hPipeRead, hPipeWrite1, sa, BUFSIZE) = 0 Then

        Exit Function

    End If

    hCurProcess = GetCurrentProcess()
    ' Replace our inheritable read handle with an non-inheritable. Not that it
    ' seems to be necessary in this case, but the docs say we should.
    Call DuplicateHandle(hCurProcess, hPipeRead, hCurProcess, hPipeRead, 0&, 0&, DUPLICATE_SAME_ACCESS Or DUPLICATE_CLOSE_SOURCE)

    ' If both STDOUT and STDERR should be redirected, get an extra handle.
    If fTwoHandles Then
        Call DuplicateHandle(hCurProcess, hPipeWrite1, hCurProcess, hPipeWrite2, 0&, 1&, DUPLICATE_SAME_ACCESS)
    End If

    With si
        .cb = Len(si)
        .dwFlags = STARTF_USESHOWWINDOW Or STARTF_USESTDHANDLES
        .wShowWindow = SW_HIDE          ' hide the window

        If fTwoHandles Then
            .hStdOutput = hPipeWrite1
            .hStdError = hPipeWrite2
        ElseIf blnStdOut Then
            .hStdOutput = hPipeWrite1
        Else
            .hStdError = hPipeWrite1
        End If

    End With

    Dim totalSeconds As Double

    If CreateProcess(vbNullString, sCommandLine, ByVal 0&, ByVal 0&, 1, 0&, ByVal 0&, vbNullString, si, pi) Then
        ' Close thread handle - we don't need it
        Call CloseHandle(pi.hThread)
        ' Also close our handle(s) to the write end of the pipe. This is important, since
        ' ReadFile will *not* return until all write handles are closed or the buffer is full.
        Call CloseHandle(hPipeWrite1)
        hPipeWrite1 = 0

        If hPipeWrite2 Then
            Call CloseHandle(hPipeWrite2)
            hPipeWrite2 = 0
        End If

        Do

            ' Add a DoEvents to allow more data to be written to the buffer for each call.
            ' This results in fewer, larger chunks to be read.
            'DoEvents
            If ReadFile(hPipeRead, baOutput(0), BUFSIZE, lBytesRead, ByVal 0&) = 0 Then

                Exit Do

            End If

            If blnOEMConvert Then
                ' convert from "DOS" to "Windows" characters
                sNewOutPut = String$(lBytesRead, 0)
                Call OemToCharBuff(baOutput(0), sNewOutPut, lBytesRead)
            Else
                ' perform no conversion (except to Unicode)
                sNewOutPut = Left$(StrConv(baOutput(), vbUnicode), lBytesRead)
            End If

            GetCommandOutput = GetCommandOutput & sNewOutPut
            ' If you are executing an application that outputs data during a long time,
            ' and don't want to lock up your application, it might be a better idea to
            ' wrap this code in a class module in an ActiveX EXE and execute it asynchronously.
            ' Then you can raise an event here each time more data is available.
            'Debug.Print sNewOutPut + vbNewLine

            If encoderType = "ffmpeg" Then
                If totalSeconds < 1 Then
                    totalSeconds = GetFFmpegFileTotalSeconds(sNewOutPut)
                End If

                Call CalculateFFMpegProgress(sNewOutPut, totalSeconds)
            Else
                Call CalculateMencoderProgress(sNewOutPut)
            End If

            'RaiseEvent OutputAvailable(sNewOutput)
        Loop

        ' When the process terminates successfully, Err.LastDllError will be
        ' ERROR_BROKEN_PIPE (109). Other values indicates an error.
        Call CloseHandle(pi.hProcess)
    Else
        GetCommandOutput = "Failed to create process, check the path of the command line."
    End If

    ' clean up
    Call CloseHandle(hPipeRead)

    If hPipeWrite1 Then
        Call CloseHandle(hPipeWrite1)
    End If

    If hPipeWrite2 Then
        Call CloseHandle(hPipeWrite2)
    End If
    Exit Function

ErrorHandler:
    Call WriteErrorLog(Err, "Class clsThread : Sub GetCommandOutput")
End Function

更新：

而如果你们是好奇什么样的应用程序是输的时候它会崩溃，这就是：

1重复的框架(s)!

Pos:83.2s2504f(99%)112.65》Trem:0min6兆A-V:0.008[571:79]] 1重复的框架(s)!

Pos:83.4s2510f(102%)112.74》Trem:0min6兆A-V:0.006[571:79] 1重复的框架(s)!

Pos:83.6s2516f(102%)112.84》Trem:0min6兆A-V:0.004[571:79] 1重复的框架(s)!

[mpeg4@0x1ac53a0]隐瞒40直流电，交流40,40MV一个错误-V:0.003[571:79]

alt文本http://img21.imageshack.us/img21/4539/exception.png

谢谢:)

Answer 1

您可以尝试使用SetUnhandledExceptionFilter API来捕获异常。我以前使用过它，但只有有限的成功。 我相信这个代码最初无论是从哪里来的，在很大程度上受到影响，或者被激发，在5月99 Visual Basic程序员杂志的文章称“也不例外错误，我亲爱的华生医生”由乔纳森Lunman。

Public Const SYSEXC_MAXIMUM_PARAMETERS = 15
'Not exactly as in API, shorter declaration, but internally the same
Type CONTEXT
  Dbls(0 To 66) As Double
  Longs(0 To 6) As Long
End Type

Type SYSEXC_RECORD
    ExceptionCode As Long
    ExceptionFlags As Long
    pExceptionRecord As Long
    ExceptionAddress As Long
    NumberParameters As Long
    ExceptionInformation(SYSEXC_MAXIMUM_PARAMETERS) As Long
End Type    
Type SYSEXC_POINTERS
    pExceptionRecord As SYSEXC_RECORD
    ContextRecord As CONTEXT
End Type

Private Declare Function SetUnhandledExceptionFilter Lib "kernel32" _
    (ByVal lpTopLevelExceptionFilter As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
    (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Sub CopyExceptionRecord Lib "kernel32" Alias "RtlMoveMemory" (pDest As SYSEXC_RECORD, ByVal LPSYSEXC_RECORD As Long, ByVal lngBytes As Long)


Public Property Get ErrSysHandlerWasSet() As Boolean
    ErrSysHandlerWasSet = mSysHandlerWasSet
End Property


Public Sub ErrSysHandlerSet()
    If mSysHandlerWasSet Then ErrSysHandlerRelease
    Call SetUnhandledExceptionFilter(AddressOf SysExcHandler)
    mSysHandlerWasSet = True
End Sub

Public Sub ErrSysHandlerRelease()
    ErrPreserve 'This Sub may be called from error handler, so preserve errors
    On Error Resume Next
    If mSysHandlerWasSet Then Call SetUnhandledExceptionFilter(0)
    mSysHandlerWasSet = False
    ErrRestore
End Sub

'========================== Private stuff ===========================================
Private Function SysExcHandler(ByRef ExcPtrs As SYSEXC_POINTERS) As Long
  Dim ExcRec As SYSEXC_RECORD, strExc As String
  ExcRec = ExcPtrs.pExceptionRecord
  Do Until ExcRec.pExceptionRecord = 0
    CopyExceptionRecord ExcRec, ExcRec.pExceptionRecord, Len(ExcRec)
  Loop
  strExc = GetExcAsText(ExcRec.ExceptionCode)
  Err.Raise ERR_SYSEXCEPTION, SRC_SYSHANDLER, _
    "(&H" & Hex$(ExcRec.ExceptionCode) & ") " & strExc
End Function

Private Function GetExcAsText(ByVal ExcNum As Long) As String
    Select Case ExcNum
        Case SYSEXC_ACCESS_VIOLATION:          GetExcAsText = "Access violation"
        Case SYSEXC_DATATYPE_MISALIGNMENT:     GetExcAsText = "Datatype misalignment"
        Case SYSEXC_BREAKPOINT:                GetExcAsText = "Breakpoint"
        Case SYSEXC_SINGLE_STEP:               GetExcAsText = "Single step"
        Case SYSEXC_ARRAY_BOUNDS_EXCEEDED:     GetExcAsText = "Array bounds exceeded"
        Case SYSEXC_FLT_DENORMAL_OPERAND:      GetExcAsText = "Float Denormal Operand"
        Case SYSEXC_FLT_DIVIDE_BY_ZERO:        GetExcAsText = "Divide By Zero"
        Case SYSEXC_FLT_INEXACT_RESULT:        GetExcAsText = "Floating Point Inexact Result"
        Case SYSEXC_FLT_INVALID_OPERATION:     GetExcAsText = "Invalid Operation"
        Case SYSEXC_FLT_OVERFLOW:              GetExcAsText = "Float Overflow"
        Case SYSEXC_FLT_STACK_CHECK:           GetExcAsText = "Float Stack Check"
        Case SYSEXC_FLT_UNDERFLOW:             GetExcAsText = "Float Underflow"
        Case SYSEXC_INT_DIVIDE_BY_ZERO:        GetExcAsText = "Integer Divide By Zero"
        Case SYSEXC_INT_OVERFLOW:              GetExcAsText = "Integer Overflow"
        Case SYSEXC_PRIVILEGED_INSTRUCTION:    GetExcAsText = "Privileged Instruction"
        Case SYSEXC_IN_PAGE_ERROR:             GetExcAsText = "In Page Error"
        Case SYSEXC_ILLEGAL_INSTRUCTION:       GetExcAsText = "Illegal Instruction"
        Case SYSEXC_NONCONTINUABLE_EXCEPTION:  GetExcAsText = "Non Continuable Exception"
        Case SYSEXC_STACK_OVERFLOW:            GetExcAsText = "Stack Overflow"
        Case SYSEXC_INVALID_DISPOSITION:       GetExcAsText = "Invalid Disposition"
        Case SYSEXC_GUARD_PAGE_VIOLATION:      GetExcAsText = "Guard Page Violation"
        Case SYSEXC_INVALID_HANDLE:            GetExcAsText = "Invalid Handle"
        Case SYSEXC_CONTROL_C_EXIT:            GetExcAsText = "Control-C Exit"
    End Select
End Function

查看 SetUnhandledExceptionFilter功能在MSDN获得更多信息。

Answer 2

如果这个应用程序是Windows XP下运行的或以后试试看使用量例外处理。你能写出一套简单的C++Dll或使用API呼吁陷阱的各种活动中发生的Win32API。

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