B4J Question USB-cameras enumeration

[peacemaker]

HI, All

Any solution how to detect USB-cameras to list them for user choice ?

 

[thetahsk]

HI, All

Any solution how to detect USB-cameras to list them for user choice ?

What application-libraries do you use for image grabbing ?

For easy enumeration USB camera's you can use powershell scripts.

'try one of these for detecting USB Camera through Powershell

Get-PnpDevice -PresentOnly | Where-Object { $_.Class -match '^Camera' }

Get-PnpDevice -PresentOnly | Where-Object { $_.InstanceId -match '^USB' }

Get-PnpDevice -PresentOnly | Where-Object { $_.Class -match '^Media' }

Running PowerShell scripts

This is really a really cool snippet. It makes it very simple to run Windows 10 PowerShell scripts. It doesn't require special permissions. Public Sub PowerShellScript(s As String) As ResumableSub s = s.Replace(CRLF, ";").Replace("""", "'") Dim shl As Shell...

www.b4x.com

 

[peacemaker]

Thanks for the way !

I use jOPenCV to work with cameras. It requires the camera int index 0, 1, 2...

Get-PnpDevice -PresentOnly | Where-Object { $_.Class -match '^Camera' }

This command returns:

Status     Class           FriendlyName                                                                     InstanceId
------     -----           ------------                                                                     ----------
OK         Camera          HP Wide Vision HD Camera                                                         USB\VID_...

Get-PnpDevice -PresentOnly | Where-Object { $_.InstanceId -match '^USB' }

Result is not only cameras:

Status     Class           FriendlyName                                                                     InstanceId
------     -----           ------------                                                                     ----------
OK         Bluetooth       Realtek Bluetooth 4.2 Adapter                                                    USB\VID_...
OK         Camera          HP Wide Vision HD Camera                                                         USB\VID_...
OK         USB             ������ᠫ�� USB-���業����                                                   USB\VID_...
OK         HIDClass        USB-���ன�⢮ �����                                                             USB\VID_...
OK         HIDClass        USB-���ன�⢮ �����                                                             USB\VID_...
OK         USB             ���⠢��� USB ���ன�⢮                                                         USB\VID_...
OK         USB             ��୥��� USB-���業���� (USB�3.0)                                              USB\ROOT...
OK         USB             ���⠢��� USB ���ன�⢮                                                         USB\VID_...
OK         USB             ��୥��� USB-���業���� (USB�3.0)                                              USB\ROOT...

Get-PnpDevice -PresentOnly | Where-Object { $_.Class -match '^Media' }

Result (here there are only audio devices, indeed "media"):

Status     Class           FriendlyName                                                                     InstanceId
------     -----           ------------                                                                     ----------
OK         MEDIA           Galaxy A7 (2017) A2DP SNK                                                        BTHENUM\...
OK         MEDIA           Redmi1 A2DP SNK                                                                  BTHENUM\...
OK         MEDIA           Nokia 3.1 Hands-Free HF Audio                                                    BTHHFENU...
OK         MEDIA           Realtek(R) Audio                                                                 HDAUDIO\...
OK         MEDIA           AMD High Definition Audio Device                                                 HDAUDIO\...
OK         MEDIA           Redmi1 Hands-Free HF Audio                                                       BTHHFENU...
OK         MEDIA           Galaxy A7 (2017) Hands-Free HF Audio                                             BTHHFENU...
OK         MEDIA           Nokia 3.1 A2DP SNK                                                               BTHENUM\...

But it needs to get cameras indexes.