camera service error

Question

 

 

Sorry i'm newer about MSRDS.

I wanna use webcam to do some project, but some problem comes.

It had worked a few weeks before, but I install secondary camera to replace from build-in camera. 

It happened some errors as below:

 

====

Unable to start capture: System.Runtime.InteropServices.COMException (0x8007048F): 裝置沒有連線。 (發生例外狀況於 HRESULT: 0x8007048F)

Category	StdError
Level	q1:Error
Time	2011-11-12T10:29:12.1205243+08:00
Subject	Unable to start capture: System.Runtime.InteropServices.COMException (0x8007048F): 裝置沒有連線。 (發生例外狀況於 HRESULT: 0x8007048F)
Source	http://solalu-pc:50000/webcam/b67577a2-103a-4cb8-837a-b2c0fcecaf58
CodeSite	Boolean MoveNext()() at line:0, file

============

* The webcam actually works, but the site http://localhost:50000/Model/Webcam show something as below

=====

model/test8fdbcd3e-6ff6-4a85-91c3-9d94adc7588dtrueRunningprogram.activity.Diagramprogram.activity.Start.snippet.elementResponseOutput: Microsoft.Ccr.Core.EmptyValueMicrosoft.Ccr.Core.EmptyValueSimplevaluehttp://localhost/mountpoint/40204e56-0984-4c60-a855-1b82b2898e8a/DEBUG_program.activity.Start.pngRunningprogram.activity.Diagramprogram.activityTupleTupleStateType

=======

Could u help me? Thanks lot^^~~

 

Answer 1

You should not be getting a COMException unless there is some problem with the camera.

Try the following:

Run DssHost32 from a DSS Command prompt by typing:

bin\dsshost32 /p:50000 /t:50001

Start a web browser and go to: http://localhost:50000

On the left-hand side of the page select Control Panel in the menu.

When the list of services appears, scroll down to find the Webcam.

Click on the Create button beside Webcam.

Now click on Service Directory in th menu at left and see if there is a webcam service.

If there is a webcam service, click on it and you should see an image.

If there is no webcam service, click on Debug and Trace Messages in the menu at the left and see what errors came up.

 

Trevor

 

 

Answer 2

Thanks a lot for your reply.

Follow as your steps. There is a webcam service, and I can see an image.

But I click on Debug and Trace Messages which still show the similar info. as below

===

Unable to start capture: System.Runtime.InteropServices.COMException (0x8007048F): 裝置沒有連線。 (發生例外狀況於 HRESULT: 0x8007048F)

Category	StdError
Level	q1:Error
Time	2011-11-12T15:31:08.8527042+08:00
Subject	Unable to start capture: System.Runtime.InteropServices.COMException (0x8007048F): 裝置沒有連線。 (發生例外狀況於 HRESULT: 0x8007048F)
Source	http://XXXXXX-pc:50000/webcam/53f8d5b1-a90a-4c4c-99fd-45850c103844
CodeSite	Boolean MoveNext()() at line:0, file

===

I try to uninstall and re-install MSRDS this morning. But it doesn't solve my problem. Cry...XD

I don't know if my PC have some missing files or other software or drivers has some against MSRDS ???

Thanks a lot your help^^~~

Answer 3

Today, I try to install MSRDS(2008R3) in Windows visual PC XP mode, it works.

But it still doesn't work in windows 7 (64bit).

I try to use beta4 version before, I don't know why it can't run DSS.

So maybe my OS(windows7) really miss some important files for MSRDS ??? 

Answer 4

Can you try a different camera? What brand is the webcam that you are using? It is more likely that the camera driver is the problem.

Trevor

 

Answer 5

I totally solved my problem. @@

At first, I have only one build-in Webcam in my NB, and then I created a file about webcam and colorsegment to control my NXT.

At one day, I plugged second webcam by USB port, and then I created new file as the same as before but it doesn't work.!!!

Tonight, I still create a new file including webcam services, but I try to change Configuration from "Set initial configuration" to Use another service. Next, I change back to "Set initial configuration", I saw some different things. XD

Settings: WebcamState

Pose

ImageSize

"Cameras" -------------pop up first, I never seen that before.

==>CamerasInstance

"Selected"--------------I can choose which one webcam I want use, even Analog Tuner. @@

 

I think that maybe I have to change Configuration by manual to let MSRDS to update hardware support???

I would appreciate your reply and patience!!!  Finally, my project could be going on ^^~~Thanks a lot.