使手闸编码器开始工作

Question

我无法让手制动器在C#为我工作。它一直抛出错误“值不能为空”。正如你在下面的截图中所看到的，我尝试了一些基于我所知道的东西。我很感谢你的任何指导，以帮助我完成这项工作。

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到目前为止，我尝试过的内容(点与错误displayed..Just FYI无关)：

1. 在我的电脑上安装了手闸
2. 添加了对HandBrakeInterop.dll的引用
3. 将所有其他必需的all复制到我的调试文件夹中，甚至尝试将它们添加为引用。
4. 尝试从x86/x64更改调试版本

我在哪里没有走上正确的轨道？

这是我的密码：

      HandBrake.Interop.HandBrakeInstance objHb = new HandBrake.Interop.HandBrakeInstance();
    HandBrake.Interop.Model.EncodeJob objJob = new HandBrake.Interop.Model.EncodeJob();
    objJob.SourceType = HandBrake.Interop.Model.SourceType.File;
    EncodingProfile objProfile = new EncodingProfile();
    objProfile.OutputFormat = Container.Mp4;
    objProfile.VideoEncodeRateType = VideoEncodeRateType.ConstantQuality;
    objProfile.IPod5GSupport = true;
    objProfile.PreferredExtension = OutputExtension.Mp4;
   // objJob.EncodingProfile = objProfile;
    objJob.SourcePath = AppDomain.CurrentDomain.BaseDirectory + "1.flv";
    objJob.OutputPath = AppDomain.CurrentDomain.BaseDirectory + "1.mp4";
    //objHb.Titles.Add(new HandBrake.Interop.SourceData.Title());

    XmlSerializer objSerializer = new XmlSerializer(typeof(EncodingProfile));


   MemoryStream mem=new MemoryStream(File.ReadAllBytes(AppDomain.CurrentDomain.BaseDirectory + "normal.xml"));
 var objPresetFromFile =  objSerializer.Deserialize(mem) as EncodingProfile;
 objJob.EncodingProfile = objPresetFromFile;
    objJob.UseDefaultChapterNames = true;
   // objJob.Title = 1;



    //HandBrake.Interop.Model.Encoders
    objHb.EncodeProgress += objHb_EncodeProgress;
    objHb.EncodeCompleted += objHb_EncodeCompleted;
    HandBrake.ApplicationServices.Parsing.Title title = new HandBrake.ApplicationServices.Parsing.Title();// new HandBrake.Interop.SourceData.Title();
    objHb.Initialize(5);
    //objHb.Titles = new System.Collections.Generic.List<HandBrake.Interop.SourceData.Title>();
    objHb.StartScan(AppDomain.CurrentDomain.BaseDirectory + "1.flv", 0);
    objJob.SourceType = HandBrake.Interop.Model.SourceType.File;
    objJob.RangeType = HandBrake.Interop.Model.VideoRangeType.Frames;

    objHb.StartEncode(objJob);

    Console.ReadLine();

编辑:根据要求，下面是从复制到剪贴板的异常的更多信息

System.ArgumentNullException was unhandled
  HResult=-2147467261
  Message=Value cannot be null.
Parameter name: source
  Source=System.Core
  ParamName=source
  StackTrace:
       at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
       at HandBrake.Interop.HandBrakeInstance.GetTitle(Int32 titleNumber) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 1604
       at HandBrake.Interop.HandBrakeInstance.GetTitleIndex(Int32 titleNumber) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 1614
       at HandBrake.Interop.HandBrakeInstance.StartEncode(EncodeJob job, Boolean preview, Int32 previewNumber, Int32 previewSeconds, Double overallSelectedLengthSeconds) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 411
       at HandBrake.Interop.HandBrakeInstance.StartEncode(EncodeJob jobToStart) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 395
       at HandBrakeTest.Program.Main(String[] args) in c:\Users\user\Documents\Visual Studio 2012\Projects\HandBrakeTest\HandBrakeTest\Program.cs:line 53
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

编辑：

1. 将手制动器实例和encodingjob实例移到main之外，使它们保持静态
2. 在扫描完成事件中调用StartEncode

现在，异常是Nullreferenceexception，详细信息如下：

System.NullReferenceException was unhandled by user code
  HResult=-2147467261
  Message=Object reference not set to an instance of an object.
  Source=HandBrakeInterop
  StackTrace:
       at HandBrake.Interop.InteropUtilities.ReadStructure[T](IntPtr structPtr) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\InteropUtilities.cs:line 31
       at HandBrake.Interop.HandBrakeInstance.StartEncode(EncodeJob job, Boolean preview, Int32 previewNumber, Int32 previewSeconds, Double overallSelectedLengthSeconds) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 412
       at HandBrake.Interop.HandBrakeInstance.StartEncode(EncodeJob jobToStart) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 395
       at HandBrakeTest.Program.objHb_ScanCompleted(Object sender, EventArgs e) in c:\Users\user\Documents\Visual Studio 2012\Projects\HandBrakeTest\HandBrakeTest\Program.cs:line 65
       at HandBrake.Interop.HandBrakeInstance.PollScanProgress() in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 811
       at HandBrake.Interop.HandBrakeInstance.<StartScan>b__2(Object o, ElapsedEventArgs e) in c:\HandBrake\Hudson\workspace\Release_WindowsGui64\0.9.9\win\CS\HandBrake.Interop\HandBrakeInterop\HandBrakeInstance.cs:line 752
       at System.Timers.Timer.MyTimerCallback(Object state)
  InnerException: 

提前谢谢。

Answer 1

我快速地看了一下源代码这里。StartScan实际上是一个异步调用，您必须在调用StartEncode之前等待引发ScanCompleted事件。

似乎正在发生的是Titles集合为null。这是在私有方法PollScanProgress中填充的，该方法似乎是通过计时器来检查扫描的进度。定时器是在StartScan中设置的。