System.AccessViolationException is thrown when playing a media

[sepehr1014]

When trying to play a video in WPF, I get this exception:
System.AccessViolationException was unhandled
HResult=-2147467261
Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Source=Vlc.DotNet.Core.Interops
StackTrace:
at Vlc.DotNet.Core.Interops.VlcManager.AttachEvent(VlcEventManagerInstance eventManagerInstance, EventTypes eventType, EventCallback callback)
at Vlc.DotNet.Core.VlcMedia.RegisterEvents()
at Vlc.DotNet.Core.VlcMedia..ctor(VlcMediaPlayer player, VlcMediaInstance mediaInstance)
at Vlc.DotNet.Core.VlcMediaPlayer.OnMediaPlayerMediaChangedInternal(IntPtr ptr)
at Vlc.DotNet.Core.Interops.VlcManager.SetMediaToMediaPlayer(VlcMediaPlayerInstance mediaPlayerInstance, VlcMediaInstance mediaInstance)
at Vlc.DotNet.Core.VlcMediaPlayer.SetMedia(VlcMedia media)
at Vlc.DotNet.Core.VlcMediaPlayer.SetMedia(FileInfo file, String[] options)
at Vlc.DotNet.Forms.VlcControl.Play(FileInfo file, String[] options)
at WpfApplication64.MainWindow.btnPlay_Click(Object sender, RoutedEventArgs e) in c:\Visual Studio 2013 Projects\WpfApplication64\WpfApplication64\MainWindow.xaml.cs:line 54
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
at System.Windows.Controls.Primitives.ButtonBase.OnClick()
at System.Windows.Controls.Button.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.Run()
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at WpfApplication64.App.Main() in c:\Visual Studio 2013 Projects\WpfApplication64\WpfApplication64\obj\Debug\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
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:

[sepehr1014]

That occurs when targeting "Any CPU"

[ghost]

This exception occurs when closing application after playing video. I find two position will show this exception:

1. src\Vlc.DotNet.Core.Interops\VlcManager.DetachEvent.cs Line 16; Vlc.DotNet.Core.Interops.VlcManager.DetachEvent(VlcEventManagerInstance eventManagerInstance, EventTypes eventType, EventCallback callback)
   When I close sample application after stop video;
2. src\Vlc.DotNet.Core.Interops\VlcManager.ReleaseMediaPlayer.cs Line 14; Vlc.DotNet.Core.Interops.VlcManager.ReleaseMediaPlayer(VlcMediaPlayerInstance mediaPlayerInstance)
   When I directly close sample application without stop video.

[sepehr1014]

@ringboow exactly! I'm getting those two exceptions too!

[ghost]

And another issue, if we didn't play any video, when closing sample application, it will throw an ArgumentException, position is:
src\Vlc.DotNet.Core.Interops\VlcManager.IsPlaying.cs Line 11;
Vlc.DotNet.Core.Interops.VlcManager.IsPlaying(VlcMediaPlayerInstance mediaPlayerInstance)

I think if we can return false directly without throw any exception ?

[flowerhouse-dev]

Take a look at this comment regarding the AccessViolationException: #22 (comment)

[jeremyVignelles]

Old issue, please reopen if still experiencing this issue