Synchronization problem causes Index out of range exception.

[vedrantrebovic]

It seems there is some problem with synchronization which causes index out of range exception.
Call stack:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
at System.Collections.Generic.List`1.get_Item(Int32 index)
at Unosquare.FFmpegMediaElement.FFmpegMediaFrameCache.SearchFrame(Decimal renderTime) in c:\xxx\ffmediaelement\ffmediaelement-master\Unosquare.FFmpegMediaElement\FFmpegMediaFrameCache.cs:line 290
at Unosquare.FFmpegMediaElement.FFmpegMediaFrameCache.GetFrame(Decimal renderTime, Boolean checkBounds) in c:\xxx\ffmediaelement\ffmediaelement-master\Unosquare.FFmpegMediaElement\FFmpegMediaFrameCache.cs:line 342
at Unosquare.FFmpegMediaElement.FFmpegMedia.RenderVideoImage(Object sender, EventArgs e) in c:\xxx\ffmediaelement\ffmediaelement-master\Unosquare.FFmpegMediaElement\FFmpegMedia.cs:line 602
at System.Windows.Threading.DispatcherTimer.FireTick(Object unused)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(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 MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(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 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, 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()

[mariodivece]

Hey, I need a sample video to see how this happens please! Any repro step[s you can provide?

[vedrantrebovic]

Hi. Put any mp4 (h264) videos playlist on loop. My application runs 6-10 videos in loop on second screen and this happened after some time.

[mariodivece]

Ok, thanks for the info. I indeed forgot to add synchronous locking to internal frame operations. It should be fixed now. Could you give it a shot with the latest commit and let me know your results? Thanks so much in advance.

[mariodivece]

no responses from @vedrantrebovic closing issue.

[vedrantrebovic]

Sorry I missed your comment. I will test it anyway.