Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
2,771 questions
How cam i use regedit or WPF disable and enable camera immediately(Windows 10)
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haoming.hsu
1
Reputation point
I use WPF do a camera detection APP,
I want the app can turn off and turn on immediately even if the webcam already open
but I try many methods can't finish it
- regedit set Value=Allow or Deny
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\DeviceAccess\Global{E5323777-F976-4f5b-9B55-B94699C46E44}\Value - regedit set Value=Allow or Deny
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\CapabilityAccessManager\ConsentStore\webcam\Value - set LetAppsAccessCamera=00000002(use Administrator)
HKEY_LOCAL_MACHINE \ SOFTWARE \ Policies \ Microsoft \ Windows \ AppPrivacy\LetAppsAccessCamera - use devcon.exe run disable this USB camera, but if i want to enable this I have to reboot computer...
only this method can turn off webcam immediately, but my app can't trigger this action
click this button
{count} votes
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DaisyTian-1203 11,621 Reputation points2020-11-23T08:59:23.33+00:00 @haoming.hsu Did you try to close the camera by killing process? Such as using
Process.GetProcessById(processId,machineName).Kill();? -
haoming.hsu 1 Reputation point
2020-11-23T09:26:20.357+00:00 No.. This project can't colse process, only want disable and enable that process's camera :(
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Castorix31 85,131 Reputation points2020-11-23T14:45:54.403+00:00 On my OS (Windows 10, 1909)
the key
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager\ConsentStore\webcam
seems to work
I have only a Virtual Webcam to test, but if I set the value to deny and I launch a C# app which reads the Webcam, I get "access denied"...
(and I tested a change notification with RegNotifyChangeKeyValue) -
haoming.hsu 1 Reputation point
2020-11-24T00:25:07.867+00:00 I try three methods can't close alrealy opened webcam include your methods
you can try open windows10 default camera , and then edit this registry key, it doesn't colse immediately
It olny disable camera after restart -
DaisyTian-1203 11,621 Reputation points
2020-11-24T08:14:06.6+00:00 @haoming.hsu There may be no api in WPF to close the camer immediately. The Answer may give you some help, I have tested it and it works on closing camera immediately.
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haoming.hsu 1 Reputation point
2020-11-25T01:24:33.723+00:00 thank you, but I change guid = 6bdd1fc6-810f-11d0-bec7-08002be2092f to try close already opened camera,it dosent work
can you show your some test code, thank you~
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DaisyTian-1203 11,621 Reputation points
2020-11-26T01:37:06.903+00:00 @haoming.hsu I tested in below steps:
1.Replace the Guid with below value:
2.Replace the Instance Id with below value:
3.Set
falseparameter toEnableMouse(bool enable) -
haoming.hsu 1 Reputation point
2020-12-01T12:27:43.527+00:00 sorry, a little busy these days, this can work, but it can't enable after disable,
seems to need reboot , you can disable and enable repeat without reboot？
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