automatically configure video acquisition (WDM)

[bimbim]

Hi everybody,

I'm using since a few month WDM drivers based on ActiveX video capture object (videocap, I think). As I can't buy IMAQ vision, the USB for video camera provided by NI can't be used.

It's works fine but I can't configure automatically the settings of the acquisition such as resolution, number of frame, etc. The driver just calls the device property page and we have to manually select the setting we want to use.

As the default setting for resolution is 320x240, and we always work in 720x576, the user has to select himself these setting in the displayed window.

So, I'd like to know wether :

 - someone knows how to change the default settings of a standard video acquisition board based on WDM so that the re-configuration is not necessary anymore?

 - someone knows another ActiveX object that provides full controls of the video acquisition, and how to use it correctly?

 - anyone has ever build a function that configures automatically the controls of the top level window?

I'm really looking forward to your answer.

Thank you in advance.

Bim

[Benjamin_M]

Hello,

It is difficult for National Instruments to help you because we don't support any ActiveX driver. Indeed, ActiveX is just a tool to help LabVIEW user to interface with other application and we can't provide any information about ActiveX developp by others companies. However, try to contact the manufactuer of the WDM driver, I'm sure he will be able to give you more information and so, help you to build your application.

Regards,

Benjamin M
NIF

[rolfk]

---

bimbim wrote:

Hi everybody,

I'm using since a few month WDM drivers based on ActiveX video capture object (videocap, I think). As I can't buy IMAQ vision, the USB for video camera provided by NI can't be used.

It's works fine but I can't configure automatically the settings of the acquisition such as resolution, number of frame, etc. The driver just calls the device property page and we have to manually select the setting we want to use.

As the default setting for resolution is 320x240, and we always work in 720x576, the user has to select himself these setting in the displayed window.

So, I'd like to know wether :

 - someone knows how to change the default settings of a standard video acquisition board based on WDM so that the re-configuration is not necessary anymore?

 - someone knows another ActiveX object that provides full controls of the video acquisition, and how to use it correctly?

 - anyone has ever build a function that configures automatically the controls of the top level window?

I'm really looking forward to your answer.

Thank you in advance.

Bim

---

IVision, while not for free really is quite somewhat cheaper than IMAQ Vision and should support programmatic control of DirectX video capture devices.

Rolf Kalbermatter

Message Edited by rolfk on 01-02-2006 01:14 PM