Videoin can't find devices

Hello, I’m not new to vvvv, but now after a couple of years not using it, I wanted to start exploring vl and opencv.
However, after installing opencv dependencies, I’m having this problem with detecting my laptop cam, at the very beginning, and can’t get rid of it.

I’m using vvvv alpha 38.2 x64 + addons pack. (Also with beta I have the same problem)

i think latest alpha and gamma preview have VL.OpenCV installed already.

also, if you click on details, what does the exception say?

1 Like

Thank you so much @tonfilm. Everything seems to work smoothly with gamma preview!

I didn’t find any solution there, and the exception in details was: “See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.”

I experienced a similar or the same problem. VideoIn works with gamma but not in alpha.

Here is the details from the error message:

See the end of this message for details on invoking 
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
   at VL.HDE.PatchEditor.Editors.EnumDynamicEditor..ctor(CanvasView canvasView, View parentView, Type type, IDynamicEnum value)
   at VL.HDE.PatchEditor.Editors.EditorFactory.<>c__DisplayClass5_0.<.cctor>b__25(CanvasView c, View p, Type t, Object v)
   at VL.HDE.PatchEditor.Editors.EditorFactory.GetEditor(CanvasView canvas, View parentView, Type type, Object value, IVLFactory factory)
   at VL.Lang.View.CanvasView.PinEditorMouseHandler.LaunchPinEditor(Boolean visible)
   at VL.Lang.View.CanvasView.PinEditorMouseHandler.MouseClick(VMouseEventArgs arg)
   at VL.Lang.View.MouseHandlerBase`1.MouseUp(VMouseEventArgs arg)
   at VL.Lang.View.CanvasView.CanvasDecisionMouseHandler.ClickMethod(VMouseEventArgs downArg, VMouseEventArgs upArg)
   at VL.Core.Viewer.Handler.<>c__DisplayClass16_1.<OnClick>b__1(VMouseEventArgs up)
   at VL.Core.Viewer.Handler.ParallelMouseHandler.MouseUp(VMouseEventArgs arg)
   at VL.Lang.View.CanvasView.CanvasDecisionMouseHandler.MouseUp(VMouseEventArgs arg)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.UserControl.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


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    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/dx11/nodes/plugins/texproc/VVVV.DX11.Nodes.TexProc.dll
----------------------------------------
VVVV.DX11.Nodes.Text
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/dx11/nodes/plugins/text/VVVV.DX11.Nodes.Text.dll
----------------------------------------
System.Runtime.Caching
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Runtime.Caching/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Runtime.Caching.dll
----------------------------------------
VVVV.CV.Core
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/Image/core/VVVV.CV.Core.dll
----------------------------------------
VVVV.CV.Nodes
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/Image/nodes/plugins/VVVV.CV.Nodes.dll
----------------------------------------
VVVV.Nodes.OpenCV.OptiTrack
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/Image/nodes/plugins/VVVV.Nodes.OpenCV.OptiTrack.dll
----------------------------------------
Microsoft.Build
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0 built by: NET472REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Build/v4.0_4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.dll
----------------------------------------
Microsoft.Build.Framework
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0 built by: NET472REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Build.Framework/v4.0_4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.Framework.dll
----------------------------------------
Microsoft.Internal.Tasks.Dataflow
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0 built by: NET472REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Internal.Tasks.Dataflow/v4.0_4.0.0.0__b77a5c561934e089/Microsoft.Internal.Tasks.Dataflow.dll
----------------------------------------
Microsoft.Build.Utilities.v4.0
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0 built by: NET472REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.Build.Utilities.v4.0/v4.0_4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.Utilities.v4.0.dll
----------------------------------------
1160322678._dynamic_.1
    Assembly Version: 3.1.5.0
    Win32 Version: 3.1.5.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.dx/nodes/plugins/TransformTestKeepLast/bin/Dynamic/1160322678._dynamic_.1.dll
----------------------------------------
mp.essentials
    Assembly Version: 3.1.9.0
    Win32 Version: 3.1.9
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/mp.essentials.dll
----------------------------------------
mp.pddn
    Assembly Version: 1.3.2.0
    Win32 Version: 1.3.2
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/md.core/mp.pddn.DLL
----------------------------------------
unvell.ReoGrid
    Assembly Version: 2.1.0.0
    Win32 Version: 2.1.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/unvell.ReoGrid.DLL
----------------------------------------
HidSharp
    Assembly Version: 2.0.8.0
    Win32 Version: 2.0.8.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/HidSharp.DLL
----------------------------------------
SimMetrics.Net
    Assembly Version: 1.0.5.0
    Win32 Version: 1.0.5.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/md.core/SimMetrics.Net.DLL
----------------------------------------
QuickGraph
    Assembly Version: 3.6.61114.0
    Win32 Version: 3.6.61114.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/QuickGraph.DLL
----------------------------------------
SharpMessage
    Assembly Version: 2.9.10.0
    Win32 Version: 2.9.10.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/SharpMessage.DLL
----------------------------------------
VVVV.Packs.Timing
    Assembly Version: 0.8.3.0
    Win32 Version: 0.8.3.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/vvvv-Message/core/VVVV.Packs.Timing.dll
----------------------------------------
GraphSharp
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/GraphSharp.DLL
----------------------------------------
EPPlus
    Assembly Version: 4.1.1.0
    Win32 Version: 4.1.1.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/EPPlus.DLL
----------------------------------------
md.stdl
    Assembly Version: 1.0.8.0
    Win32 Version: 1.0.8
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/md.core/md.stdl.DLL
----------------------------------------
System.Numerics
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0 built by: NET472REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Numerics/v4.0_4.0.0.0__b77a5c561934e089/System.Numerics.dll
----------------------------------------
vJoyInterfaceWrap
    Assembly Version: 0.2.1.6
    Win32 Version: 2.1.6.999
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/packs/mp.essentials/nodes/plugins/vJoyInterfaceWrap.DLL
----------------------------------------
Microsoft.CSharp
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Microsoft.CSharp/v4.0_4.0.0.0__b03f5f7f11d50a3a/Microsoft.CSharp.dll
----------------------------------------
System.Dynamic
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Dynamic/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Dynamic.dll
----------------------------------------
CodeEditor
    Assembly Version: 1.0.7020.2665
    Win32 Version: 1.0.7020.2665
    CodeBase: file:///C:/VVVV/VVVV_50ALPHA38.2_X64/LIB/NODES/EDITORS/CODEEDITOR.DLL
----------------------------------------
log4net
    Assembly Version: 1.2.10.0
    Win32 Version: 1.2.10.0
    CodeBase: file:///C:/VVVV/VVVV_50ALPHA38.2_X64/LIB/NODES/EDITORS/LOG4NET.DLL
----------------------------------------
ICSharpCode.TextEditor
    Assembly Version: 3.2.1.6466
    Win32 Version: 3.2.1.6466
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/ICSharpCode.TextEditor.DLL
----------------------------------------
System.Data
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3260.0 built by: NET472REL1LAST_C
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_64/System.Data/v4.0_4.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
MetadataViewProxies_2d33f62a-f5f9-4f19-8df0-ace7525ec92d
    Assembly Version: 0.0.0.0
    Win32 Version: 1.1.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/System.ComponentModel.Composition.CodePlex.dll
----------------------------------------
Accessibility
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0 built by: NET472REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Accessibility/v4.0_4.0.0.0__b03f5f7f11d50a3a/Accessibility.dll
----------------------------------------
VL.CoreLib
    Assembly Version: 0.99.0.0
    Win32 Version: 0.99.44.11726
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/VL.CoreLib.DLL
----------------------------------------
VL.DynamicAssembly_2
    Assembly Version: 0.0.0.0
    Win32 Version: 0.99.44.11726
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/Microsoft.Cci.ReflectionEmitter.dll
----------------------------------------
VL.DynamicAssembly_3
    Assembly Version: 0.0.0.0
    Win32 Version: 0.99.44.11726
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/Microsoft.Cci.ReflectionEmitter.dll
----------------------------------------
SkiaSharp
    Assembly Version: 1.68.0.0
    Win32 Version: 1.68.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/SkiaSharp.DLL
----------------------------------------
System.Numerics.Vectors
    Assembly Version: 4.1.4.0
    Win32 Version: 4.6.26515.06
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/System.Numerics.Vectors.DLL
----------------------------------------
VL.DynamicAssembly_4
    Assembly Version: 0.0.0.0
    Win32 Version: 0.99.44.11726
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/Microsoft.Cci.ReflectionEmitter.dll
----------------------------------------
VL.DynamicAssembly_5
    Assembly Version: 0.0.0.0
    Win32 Version: 0.99.44.11726
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/Microsoft.Cci.ReflectionEmitter.dll
----------------------------------------
OpenCvSharp
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/packs/OpenCvSharp4.4.0.1.20190326/lib/net461/OpenCvSharp.dll
----------------------------------------
VL.OpenCV
    Assembly Version: 0.2.83.0
    Win32 Version: 0.2.83
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/packs/VL.OpenCV.0.2.83-alpha/lib/net461/VL.OpenCV.dll
----------------------------------------
SkiaSharp.Extended.Svg
    Assembly Version: 1.60.0.0
    Win32 Version: 1.60.0.0
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/SkiaSharp.Extended.Svg.DLL
----------------------------------------
VL.DynamicAssembly_6
    Assembly Version: 0.0.0.0
    Win32 Version: 0.99.44.11726
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/core/Microsoft.Cci.ReflectionEmitter.dll
----------------------------------------
System.Management
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.3056.0 built by: NET472REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Management/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Management.dll
----------------------------------------
SharpDX.MediaFoundation
    Assembly Version: 4.0.1.0
    Win32 Version: 4.0.1
    CodeBase: file:///C:/VVVV/vvvv_50alpha38.2_x64/lib/packs/SharpDX.MediaFoundation.4.0.1/lib/net45/SharpDX.MediaFoundation.dll
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

edit: this error was with VL.OpenCV 0.2.84 and VL Version 99 from vvvv alpha. With VL.OpenCV 0.2.83 the VideoIn works.

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