Reading Composite Video Format from Video Capture Card

[joecon]

Hi,

 This is my first project using CVI.

I need to add the ability to have a program read & verify that the correct video standard/format is out put by a product under test, it may be either PAL or NTSC.

The existing hadrware consists of a 'std' PC video capture card (VS-8883DV-PRO, shows as 88XDV in device manager) which is fed with the UUT composit video. Currently AMCap utility displays the video picture, & the menus allow the format detected to be viewed. Test software for main body of testing is CVI/ Teststand.

Is it possible to read the format information with CVI ?  I beleive it should be possible with directshow but not sure how this could be implemented in CVI?

Thanks in advance.

[DanBrowne]

Hi,

Firstly, how is the AMCap utility detecting the format of the signal, and therefore displaying the picture? This will dictate whether or not you can read the format information in CVI.

Another possibilty would be to use Image Processing in CVI in order to indirectly determine the format of the video signal, as things like the vertical resolution (number of lines) will be different depending on whether it is PAL or NTSC format. This would be easy enough to determine by look at the image buffer dimensions.

Regards,

Dan