Mediaportal 1.02 and For The Record 1.4RC (1 Viewer)

[thesystemera]

Got this a few times while watching S-Video feed from my PVR150..

Never had TV issues before... It is either MP1.02 or the latest For The Record..

Any one else having this issue?

2009-05-13 23:09:25.461695 [ERROR][7]: VMR9: Dispose() from wrong thread
2009-05-13 23:09:25.581695 [ERROR][7]: VMR9: Error removing filter - System.InvalidCastException: Specified cast is not valid.
at DirectShowLib.IGraphBuilder.RemoveFilter(IBaseFilter pFilter)
at MediaPortal.Player.VMR9Util.Dispose()

 

[tourettes]

2009-05-13 23:09:25.581695 [ERROR][7]: VMR9: Error removing filter - System.InvalidCastException: Specified cast is not valid.
at DirectShowLib.IGraphBuilder.RemoveFilter(IBaseFilter pFilter)
at MediaPortal.Player.VMR9Util.Dispose()

Sounds like 4TR is stopping the graph from a wrong thread.

 

[dvdfreak]

The For The Record recorder/tuner for TV server has a built-in mechanism to make sure the IController that's passed in with the plugin's Start() method it always accessed in a thread-safe way.

So far so good, however, the actual call itself may indeed come from a different thread and apparently this is causing the above issue

But what is the official way to call IController methods after a plugin's Start() has ended (in other words: from a background thread). The main thread is under control of TvService, so how can a plugin "play nice"?

With the required information I'll fix this asap.

[EDIT]
Perhaps I should simply use RemoteControl.Instance.Foo() when I make calls to the controller? Even though I'm on the same machine as TV server?

 

[dvdfreak]

After some pondering, I will change the For The Record recorder/tuner to use RemoteControl.Instance in version 1.4. So it will use TV server's remoting interface and in a way will act as a "client" of TV server, which it sort of also is

This will do away with any potential threading issues as far as the code in the recorder/tuner is concerned.

 

[thesystemera]

Thanks dvdfreak... Do you need any more logs or did that small bit of code describe it all... Any chance of a quck patch...

It is strange, seems to effect my timeshift as well.. Quite simply I'm having random drop outs with no particular time and consistancy... Have noticed seems to happen more when I'm flipping through my STB channels with my PVR-150...

Thanks for the prompt reply.. Think I'm gonna have to top you up over there

 

[thesystemera]

Hey I'm still having the above problem.. MediaPortal 1.02 and the latest 4TR

2009-05-31 21:03:58.362998 [ERROR][7]: VMR9: Dispose() from wrong thread
2009-05-31 21:03:58.506998 [ERROR][7]: VMR9: Error removing filter - System.InvalidCastException: Specified cast is not valid.
at DirectShowLib.IGraphBuilder.RemoveFilter(IBaseFilter pFilter)
at MediaPortal.Player.VMR9Util.Dispose()
2009-05-31 21:04:01.330998 [ERROR][MPMain]: VMR9: Error removing filter - System.Runtime.InteropServices.InvalidComObjectException: COM object that has been separated from its underlying RCW cannot be used.
at DirectShowLib.IGraphBuilder.RemoveFilter(IBaseFilter pFilter)
at MediaPortal.Player.VMR9Util.Dispose()
2009-05-31 21:04:01.567998 [ERROR][MPMain]: VMR9: Multiple instances of VMR9 running!!!
2009-05-31 21:04:01.568998 [ERROR][MPMain]: TSReaderPlayer:exception while creating DShow graph VMR9Helper: Multiple instances of VMR9 running!!! at MediaPortal.Player.VMR9Util.AddVMR9(IGraphBuilder graphBuilder)
at MediaPortal.Player.TSReaderPlayer.GetInterfaces(String filename)
2009-05-31 21:04:01.568998 [ERROR][MPMain]: TSReaderPlayer:GetInterfaces() failed


Once this error happens I can't do any thing what ever because basically 4TR has the tuner still in use and does not release it..

 

[dvdfreak]

I'm going to make a bold statement and call this a TV server bug. For The Record now uses RemoteControl.Instance to control TV server, and since this is the "official" API of TV server the problem must lie within it...

 

[thesystemera]

I agree.. Just trying to gather attention to the issue... It could be a codec issue but I've tried a few different codecs and still with no luck... AARRGG

 

[tourettes]

I'm going to make a bold statement and call this a TV server bug. For The Record now uses RemoteControl.Instance to control TV server, and since this is the "official" API of TV server the problem must lie within it...

If you look more closely the error log its not happening on the server side, but instead on the client side. I.e. when stopping the playback directshow graph someone is calling the stop from wrong thread.

I would look at the client plugin at first (not sure how much 4TR has own code for the client side).

 

[tourettes]

Hey I'm still having the above problem.. MediaPortal 1.02 and the latest 4TR

PLease uninstall 4TR and try to reproduce the issue so we know where to look from. TVE3 users haven't reported such issue (at least I haven't seen on the forums).