System.AccessViolationException occurred in D3DRenderer

[mi1124]

Hi,

I get the following exception in D3DRenderer in SetBackBufferInternal():
System.AccessViolationException occurred. An attempt was made to read or write in the protected memory. This is often an indication that other memory is corrupted.

StackTrace:
bei MS.Win32.PresentationCore.UnsafeNativeMethods.InteropDeviceBitmap.Create(IntPtr d3dResource, Double dpiX, Double dpiY, UInt32 version, FrontBufferAvailableCallback pfnCallback, Boolean isSoftwareFallbackEnabled, SafeMILHandle& ppInteropDeviceBitmap, UInt32& pixelWidth, UInt32& pixelHeight)
bei System.Windows.Interop.D3DImage.SetBackBuffer(D3DResourceType backBufferType, IntPtr backBuffer, Boolean enableSoftwareFallback)
bei Vdi.VideoFramework.MediaPlayer.D3DRenderer.SetBackBufferInternal(IntPtr backBuffer) in D:\Sources\Repository\Main\Components\VideoFramework_2015\SourceCode\VideoFramework\MediaPlayer\D3DRenderer.cs:Zeile 387.

• this exception occurs after sometime when I try playing mulitple videos .
• I used [System.Runtime.ExceptionServices.HandleProcessCorruptedStateExceptionsAttribute()] on the function which was causing the AccessViolationException, but the application still crashes.

Any workaround for this exception?

[xmedeko]

Do you use EVR or VMR9 presenter?

Maybe it's a WPF bug, e.g. see https://social.msdn.microsoft.com/Forums/vstudio/en-US/621c4621-d494-4c02-8dd8-8b293e7b1ee1/access-violation-when-switching-monitor-mode?forum=wpf

[mi1124]

Using EVR Presenter. The crash is only happening if TWO or more monitors are connected. It seems it doesnt happen if only one monitor is connected to the PC.

[xmedeko]

Try VMR9 presenter. IMHO it's better than WPF-MediaKit EVR presenter. (I do not think VMR9 is generally better than EVR, just this this implementation of EVR is not perfect.)

[mi1124]

Sorry , it is not the number of monitors connected to the PC that is causing the crash.
The code crashes at - D3DImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, backBuffer, true);
with " Access Violation Exception in PresentationCore.dll. An attempt was made to read or write in the protected memory. This is often an indication that other memory is corrupted. "

Do you know how can I prevent backBuffer(i.e, pointer) from accessing protected memory?

[xmedeko]

It works for well for me and many others. You have either some other problem in your setup or you have hit some WPF bug. Try VMR9 renderer.

[olivegamestudio]

I'm having the same symptom (callstack crash). I have my videos set to VMR9 too.

I simply have a single screen setup, then whilst videos are playing plugin another screen to the setup and pop with an access violation.

[xmedeko]

How do play your videos on another screen? Can you reproduce the bug somehow with the Test Application? I use playing video on another screen - i.e. open WPF Window window on another screen with the player - and it works fine.

[olivegamestudio]

I have a couple of videos playing on the primary screen only. i dont put them on the secondary screen or move them at all. where can i find the test application?

[xmedeko]

You have written "then whilst videos are playing plugin another screen".
Test Application: https://github.com/Sascha-L/WPF-MediaKit/tree/master/Test%20Application
Also, try some other computer (with different graphics card), if you have dual or hybrid graphics card, try to switch to the other card.