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video preview stopped after windows update (KB4598242)

Mar 03 (9 months ago)
henry lee wrote
Hi visioforge.
I'm using Samsung Flex 2, and I'm trying to "video preview" at demo application. (downloaded from github - .Net-SDK-s-samples-master\Video Capture SDK\WPF\CSharp\Main_Demo)

But, the preview grid showed only the first frame and froze before press the stop button.

Here's my log.

Thank you.
Reply
15 Answers
Mar 03 (9 months ago)
Roman Minyaylov agent wrote
Hi

Does it work using Video Preview mode instead of a custom source?

Thank you!
Mar 03 (9 months ago)
henry lee wrote
Hi

I'm using "Video Preview", not a "custom source" but it doesn't work.
Mar 03 (9 months ago)
henry lee wrote
I send the log at the top. ( I saw the log, but no errors in the log messages..)

And also allow the camera access.
Mar 03 (9 months ago)
Roman Minyaylov agent wrote
Mar 03 (9 months ago)
henry lee wrote
Sorry. I misunderstood it.

Here's my real log.

Thank you.
Mar 04 (9 months ago)
Roman Minyaylov agent wrote
Logs looks OK (except that you are started it several times).

Please try to run our demo apps for both, WinForms and WPF. Maybe we have some rendering issue.
Mar 12 (8 months ago)
henry lee wrote
Here's my log. (Winform)

Log that before I sent is WPF demo app.
(My solution is made by wpf, so I can't change framework.)

Thank you.
Mar 12 (8 months ago)
Roman Minyaylov agent wrote
Do you have same preview issue in WinForms app?
Mar 12 (8 months ago)
Roman Minyaylov agent wrote
Maybe you have some security software like Kaspersky that can block webcam?
Mar 13 (8 months ago)
henry lee wrote
No issue with the Winform Demo app.

I have no security app.
All of my customer that installed KB4598242 have the same issue.
Mar 15 (8 months ago)
Roman Minyaylov agent wrote
That's web-camera related update with known issues. I suggest to remove update and wait for a new version.

It's nothing to do from our side as I see.
Apr 01 (8 months ago)
henry lee wrote
I think it's not a "known issues". It's "Update" about security.


```
Updates to improve security when using external devices, such as game controllers, printers, and web cameras.
```

So, I need a new version that contains new security codes.


Thank you.
Apr 03 (8 months ago)
Roman Minyaylov agent wrote
Do you have this issue in SDK WPF demo app?