[GH-ISSUE #1430] [Bug] Crashing frequently when importing an mp4 #1048

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opened 2026-02-26 09:33:24 +03:00 by kerem · 0 comments

kerem commented

2026-02-26 09:33:24 +03:00

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Originally created by @Sasani-Likes-Penguins on GitHub (Dec 24, 2025).
Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/1430

Originally assigned to: @NickeManarin on GitHub.

When I try opening an mp4 with ffmpeg or Media Player the app crashes around 90% of the time. It does the same while saving a gif as well. Sometimes it disappears without an error, but this is the one I get:

DialogResult can be set only after Window is created and shown as dialog.

at System.Windows.Window.set_DialogResult(Nullable`1 value)
at ScreenToGif.Windows.Other.VideoSource.<Window_Loaded>b__10_5() in R:\Source\ScreenToGif\ScreenToGif\Windows\Other\VideoSource.xaml.cs:line 88
at System.Windows.Threading.DispatcherOperation.InvokeDelegateCore()
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
--- End of stack trace from previous location ---
at System.Windows.Threading.DispatcherOperation.Wait(TimeSpan timeout)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherOperation operation, CancellationToken cancellationToken, TimeSpan timeout)
at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority, CancellationToken cancellationToken, TimeSpan timeout)
at System.Windows.Threading.Dispatcher.Invoke(Action callback)
at ScreenToGif.Windows.Other.VideoSource.<Window_Loaded>b__10_3(Object _, EventArgs _) in R:\Source\ScreenToGif\ScreenToGif\Windows\Other\VideoSource.xaml.cs:line 85
at ScreenToGif.ViewModel.VideoSourceViewModel.GetFiles(String folder) in R:\Source\ScreenToGif\ScreenToGif.ViewModel\VideoSourceViewModel.cs:line 827
at ScreenToGif.ViewModel.VideoSourceViewModel.<>c__DisplayClass124_0.b__1(Object sender, DataReceivedEventArgs e) in R:\Source\ScreenToGif\ScreenToGif.ViewModel\VideoSourceViewModel.cs:line 736
at System.Diagnostics.AsyncStreamReader.FlushMessageQueue(Boolean rethrowInNewThread)
--- End of stack trace from previous location ---
at System.Threading.QueueUserWorkItemCallback.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()

Originally created by @Sasani-Likes-Penguins on GitHub (Dec 24, 2025). Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/1430 Originally assigned to: @NickeManarin on GitHub. When I try opening an mp4 with ffmpeg or Media Player the app crashes around 90% of the time. It does the same while saving a gif as well. Sometimes it disappears without an error, but this is the one I get: DialogResult can be set only after Window is created and shown as dialog. at System.Windows.Window.set_DialogResult(Nullable`1 value) at ScreenToGif.Windows.Other.VideoSource.<Window_Loaded>b__10_5() in R:\Source\ScreenToGif\ScreenToGif\Windows\Other\VideoSource.xaml.cs:line 88 at System.Windows.Threading.DispatcherOperation.InvokeDelegateCore() at System.Windows.Threading.DispatcherOperation.InvokeImpl() --- End of stack trace from previous location --- at System.Windows.Threading.DispatcherOperation.Wait(TimeSpan timeout) at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherOperation operation, CancellationToken cancellationToken, TimeSpan timeout) at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority, CancellationToken cancellationToken, TimeSpan timeout) at System.Windows.Threading.Dispatcher.Invoke(Action callback) at ScreenToGif.Windows.Other.VideoSource.<Window_Loaded>b__10_3(Object _, EventArgs _) in R:\Source\ScreenToGif\ScreenToGif\Windows\Other\VideoSource.xaml.cs:line 85 at ScreenToGif.ViewModel.VideoSourceViewModel.GetFiles(String folder) in R:\Source\ScreenToGif\ScreenToGif.ViewModel\VideoSourceViewModel.cs:line 827 at ScreenToGif.ViewModel.VideoSourceViewModel.<>c__DisplayClass124_0.<GetMultipleScreencaps>b__1(Object sender, DataReceivedEventArgs e) in R:\Source\ScreenToGif\ScreenToGif.ViewModel\VideoSourceViewModel.cs:line 736 at System.Diagnostics.AsyncStreamReader.FlushMessageQueue(Boolean rethrowInNewThread) --- End of stack trace from previous location --- at System.Threading.QueueUserWorkItemCallback.Execute() at System.Threading.ThreadPoolWorkQueue.Dispatch() at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()